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Recovery: Where TAVR gains advantage over SAVR
A post hoc analysis of the first randomized clinical to show the superiority of an interventional technique for aortic valve repair over surgery in terms of postoperative death has found the period of 30 days to 4 months after the procedure to be the most perilous for surgery patients, when their risk of death was almost twice that of interventional patients, likely because surgery patients were more vulnerable to complications and were less likely to go home after the procedure.
“This mortality difference was largely driven by higher rates of technical failure, surgical complications, and lack of recovery following surgery,” said Vincent A. Gaudiani, MD, of El Camino Hospital, Mountain View, Calif., and his coauthors (J Thorac Cardiovasc Surg. 2017;153:1293-99). The analysis investigated causes and timing of death in the CoreValve US Pivotal High-Risk Trial, a randomized, high-risk trial of the CoreValve self-expanding bioprosthesis (Medtronic). The trial favored transcatheter aortic valve replacement (TAVR) over surgical aortic valve replacement (SAVR).
The post hoc analysis evaluated all-cause mortality through the first year based on three time periods: early, up to 30 days; recovery, 31-120 days; and late, 121-365 days. Death rates for the two procedures were similar in the early and late postoperative periods, but deviated significantly in the recovery period: 4% for TAVR vs. 7.9% for SAVR (P = .25). SAVR patients were more likely affected by the overall influence of physical stress associated with surgery, the study found, whereas rates of technical failure and complications were similar between the two groups. “This suggests that early TAVR results can improve with technical refinements and that high-risk surgical patients will benefit from reducing complications,” wrote Dr. Gaudiani and his coauthors.
They noted the CoreValve trial findings, in terms of the survival differences between TAVR and SAVR, are significant because previous trials that compared TAVR and SAVR, including the Placement of Aortic Transcatheter Valves A trial (Lancet. 2015;385:2477-84), showed equivalent survival between the two procedures at up to 5 years. “This unique finding is provocative and the reason for this survival difference is important to understanding TAVR and SAVR and improving both therapies,” said Dr. Gaudiani and his coauthors.
While SAVR patients had a higher overall death rate in the recovery period, TAVR patients had a larger proportion of cardiovascular deaths – 12 of 15 (80%) vs. 16 of 27 (59.3%) for SAVR. The leading noncardiovascular cause of death in the SAVR group was sepsis (six), followed by malignancy (one), chronic obstructive pulmonary disease (one) and other (three). “Although these deaths were adjudicated as noncardiovascular by the CEC [clinical events committee], our review showed that some of these patients had never really recovered from the initial procedure,” the researchers wrote.
In the early period, death rates were 3.3% for TAVR and 4.5% for SAVR, a nonsignificant difference. TAVR patients who died had higher rates of peripheral vascular disease and recent falls; SAVR patients who died were more likely to have had a pacemaker. In the late period, the death rates were 7.5% for TAVR and 7.7% for SAVR, and the researchers also found no significant difference in the number of cardiovascular deaths (4.4% and 4.2%, respectively). “Hierarchical causes of death were primarily due to other reasons deemed unrelated to the initial aortic valve replacement,” noted Dr. Gaudiani and his coauthors.
However, the study also found that TAVR patients were significantly more likely to go home after hospital discharge rather than to a rehabilitation facility or another hospital – 66.9% vs. 39.7% (P less than .001).
In the SAVR group, five cardiovascular deaths in the recovery period occurred because the operation failed to correct aortic stenosis – all related to placement of a valve too small for the patient. “Placing a valve appropriately sized to the patient should be a priority for surgeons if we are to improve our outcomes,” the researchers noted. “Most other deaths were the result of patients’ inability to cope with the physical trauma of surgery.”
Dr. Gaudiani disclosed that he is a consultant and paid instructor for Medtronic, St. Jude Medical, and Edwards Lifesciences. Coauthors disclosed relationships with Edwards Lifesciences, Terumo, Gore Medical, Medtronic, Boston Scientific, and other device companies.
In his invited discussion, Craig R. Smith, MD, of New York, noted that comparisons “are odious” and that comparing clinical trials requires caution. (J Thorac Cardiovasc Surg. 2017;153:1300-1) He also acknowledged that surgeons would hope for evidence that the findings of the CoreValve US Pivotal High-Risk Trial were somehow wrong.
Dr. Smith raised a question about the CoreValve trial, which was designed to enroll high-risk patients, “but actually enrolled at the upper end of the intermediate risk range with a Society of Thoracic Surgeons (STS) score of 7.4 versus 11.3 in the high-risk PARTNER 1.” However, he noted that it would not be fair to consider the self-expanding TAVR trial intermediate risk, because the intermediate risk PARTNER 2 trial had an STS score of 5.8. And while outcomes for SAVR in the CoreValve trial were within the expected variable of less than 1 using the STS Predicted Risk for Mortality, the “bulge” of deaths in the recovery phase raises “a whiff of concern.”
Dr. Smith said that the early technical mortalities with TAVR in the trial are already disappearing with experience. He also noted that Dr. Gaudiani and his coauthors pointed out the frequency of failure to repair and failure to recover. “Whether competing against TAVR in a randomized trial or operating on TAVR in eligible patients in the future, as the authors have emphasized, it behooves us to correct the problem as completely as possible and take the best possible care of our patients afterward,” Dr. Smith said. He also noted the difference in discharge rates home “illustrates a very significant advantage of TAVR.”
Dr. Smith disclosed he has received reimbursement for expenses in his leadership role in the Placement of Aortic Transcatheter Valves (PARTNER) trials.
In his invited discussion, Craig R. Smith, MD, of New York, noted that comparisons “are odious” and that comparing clinical trials requires caution. (J Thorac Cardiovasc Surg. 2017;153:1300-1) He also acknowledged that surgeons would hope for evidence that the findings of the CoreValve US Pivotal High-Risk Trial were somehow wrong.
Dr. Smith raised a question about the CoreValve trial, which was designed to enroll high-risk patients, “but actually enrolled at the upper end of the intermediate risk range with a Society of Thoracic Surgeons (STS) score of 7.4 versus 11.3 in the high-risk PARTNER 1.” However, he noted that it would not be fair to consider the self-expanding TAVR trial intermediate risk, because the intermediate risk PARTNER 2 trial had an STS score of 5.8. And while outcomes for SAVR in the CoreValve trial were within the expected variable of less than 1 using the STS Predicted Risk for Mortality, the “bulge” of deaths in the recovery phase raises “a whiff of concern.”
Dr. Smith said that the early technical mortalities with TAVR in the trial are already disappearing with experience. He also noted that Dr. Gaudiani and his coauthors pointed out the frequency of failure to repair and failure to recover. “Whether competing against TAVR in a randomized trial or operating on TAVR in eligible patients in the future, as the authors have emphasized, it behooves us to correct the problem as completely as possible and take the best possible care of our patients afterward,” Dr. Smith said. He also noted the difference in discharge rates home “illustrates a very significant advantage of TAVR.”
Dr. Smith disclosed he has received reimbursement for expenses in his leadership role in the Placement of Aortic Transcatheter Valves (PARTNER) trials.
In his invited discussion, Craig R. Smith, MD, of New York, noted that comparisons “are odious” and that comparing clinical trials requires caution. (J Thorac Cardiovasc Surg. 2017;153:1300-1) He also acknowledged that surgeons would hope for evidence that the findings of the CoreValve US Pivotal High-Risk Trial were somehow wrong.
Dr. Smith raised a question about the CoreValve trial, which was designed to enroll high-risk patients, “but actually enrolled at the upper end of the intermediate risk range with a Society of Thoracic Surgeons (STS) score of 7.4 versus 11.3 in the high-risk PARTNER 1.” However, he noted that it would not be fair to consider the self-expanding TAVR trial intermediate risk, because the intermediate risk PARTNER 2 trial had an STS score of 5.8. And while outcomes for SAVR in the CoreValve trial were within the expected variable of less than 1 using the STS Predicted Risk for Mortality, the “bulge” of deaths in the recovery phase raises “a whiff of concern.”
Dr. Smith said that the early technical mortalities with TAVR in the trial are already disappearing with experience. He also noted that Dr. Gaudiani and his coauthors pointed out the frequency of failure to repair and failure to recover. “Whether competing against TAVR in a randomized trial or operating on TAVR in eligible patients in the future, as the authors have emphasized, it behooves us to correct the problem as completely as possible and take the best possible care of our patients afterward,” Dr. Smith said. He also noted the difference in discharge rates home “illustrates a very significant advantage of TAVR.”
Dr. Smith disclosed he has received reimbursement for expenses in his leadership role in the Placement of Aortic Transcatheter Valves (PARTNER) trials.
A post hoc analysis of the first randomized clinical to show the superiority of an interventional technique for aortic valve repair over surgery in terms of postoperative death has found the period of 30 days to 4 months after the procedure to be the most perilous for surgery patients, when their risk of death was almost twice that of interventional patients, likely because surgery patients were more vulnerable to complications and were less likely to go home after the procedure.
“This mortality difference was largely driven by higher rates of technical failure, surgical complications, and lack of recovery following surgery,” said Vincent A. Gaudiani, MD, of El Camino Hospital, Mountain View, Calif., and his coauthors (J Thorac Cardiovasc Surg. 2017;153:1293-99). The analysis investigated causes and timing of death in the CoreValve US Pivotal High-Risk Trial, a randomized, high-risk trial of the CoreValve self-expanding bioprosthesis (Medtronic). The trial favored transcatheter aortic valve replacement (TAVR) over surgical aortic valve replacement (SAVR).
The post hoc analysis evaluated all-cause mortality through the first year based on three time periods: early, up to 30 days; recovery, 31-120 days; and late, 121-365 days. Death rates for the two procedures were similar in the early and late postoperative periods, but deviated significantly in the recovery period: 4% for TAVR vs. 7.9% for SAVR (P = .25). SAVR patients were more likely affected by the overall influence of physical stress associated with surgery, the study found, whereas rates of technical failure and complications were similar between the two groups. “This suggests that early TAVR results can improve with technical refinements and that high-risk surgical patients will benefit from reducing complications,” wrote Dr. Gaudiani and his coauthors.
They noted the CoreValve trial findings, in terms of the survival differences between TAVR and SAVR, are significant because previous trials that compared TAVR and SAVR, including the Placement of Aortic Transcatheter Valves A trial (Lancet. 2015;385:2477-84), showed equivalent survival between the two procedures at up to 5 years. “This unique finding is provocative and the reason for this survival difference is important to understanding TAVR and SAVR and improving both therapies,” said Dr. Gaudiani and his coauthors.
While SAVR patients had a higher overall death rate in the recovery period, TAVR patients had a larger proportion of cardiovascular deaths – 12 of 15 (80%) vs. 16 of 27 (59.3%) for SAVR. The leading noncardiovascular cause of death in the SAVR group was sepsis (six), followed by malignancy (one), chronic obstructive pulmonary disease (one) and other (three). “Although these deaths were adjudicated as noncardiovascular by the CEC [clinical events committee], our review showed that some of these patients had never really recovered from the initial procedure,” the researchers wrote.
In the early period, death rates were 3.3% for TAVR and 4.5% for SAVR, a nonsignificant difference. TAVR patients who died had higher rates of peripheral vascular disease and recent falls; SAVR patients who died were more likely to have had a pacemaker. In the late period, the death rates were 7.5% for TAVR and 7.7% for SAVR, and the researchers also found no significant difference in the number of cardiovascular deaths (4.4% and 4.2%, respectively). “Hierarchical causes of death were primarily due to other reasons deemed unrelated to the initial aortic valve replacement,” noted Dr. Gaudiani and his coauthors.
However, the study also found that TAVR patients were significantly more likely to go home after hospital discharge rather than to a rehabilitation facility or another hospital – 66.9% vs. 39.7% (P less than .001).
In the SAVR group, five cardiovascular deaths in the recovery period occurred because the operation failed to correct aortic stenosis – all related to placement of a valve too small for the patient. “Placing a valve appropriately sized to the patient should be a priority for surgeons if we are to improve our outcomes,” the researchers noted. “Most other deaths were the result of patients’ inability to cope with the physical trauma of surgery.”
Dr. Gaudiani disclosed that he is a consultant and paid instructor for Medtronic, St. Jude Medical, and Edwards Lifesciences. Coauthors disclosed relationships with Edwards Lifesciences, Terumo, Gore Medical, Medtronic, Boston Scientific, and other device companies.
A post hoc analysis of the first randomized clinical to show the superiority of an interventional technique for aortic valve repair over surgery in terms of postoperative death has found the period of 30 days to 4 months after the procedure to be the most perilous for surgery patients, when their risk of death was almost twice that of interventional patients, likely because surgery patients were more vulnerable to complications and were less likely to go home after the procedure.
“This mortality difference was largely driven by higher rates of technical failure, surgical complications, and lack of recovery following surgery,” said Vincent A. Gaudiani, MD, of El Camino Hospital, Mountain View, Calif., and his coauthors (J Thorac Cardiovasc Surg. 2017;153:1293-99). The analysis investigated causes and timing of death in the CoreValve US Pivotal High-Risk Trial, a randomized, high-risk trial of the CoreValve self-expanding bioprosthesis (Medtronic). The trial favored transcatheter aortic valve replacement (TAVR) over surgical aortic valve replacement (SAVR).
The post hoc analysis evaluated all-cause mortality through the first year based on three time periods: early, up to 30 days; recovery, 31-120 days; and late, 121-365 days. Death rates for the two procedures were similar in the early and late postoperative periods, but deviated significantly in the recovery period: 4% for TAVR vs. 7.9% for SAVR (P = .25). SAVR patients were more likely affected by the overall influence of physical stress associated with surgery, the study found, whereas rates of technical failure and complications were similar between the two groups. “This suggests that early TAVR results can improve with technical refinements and that high-risk surgical patients will benefit from reducing complications,” wrote Dr. Gaudiani and his coauthors.
They noted the CoreValve trial findings, in terms of the survival differences between TAVR and SAVR, are significant because previous trials that compared TAVR and SAVR, including the Placement of Aortic Transcatheter Valves A trial (Lancet. 2015;385:2477-84), showed equivalent survival between the two procedures at up to 5 years. “This unique finding is provocative and the reason for this survival difference is important to understanding TAVR and SAVR and improving both therapies,” said Dr. Gaudiani and his coauthors.
While SAVR patients had a higher overall death rate in the recovery period, TAVR patients had a larger proportion of cardiovascular deaths – 12 of 15 (80%) vs. 16 of 27 (59.3%) for SAVR. The leading noncardiovascular cause of death in the SAVR group was sepsis (six), followed by malignancy (one), chronic obstructive pulmonary disease (one) and other (three). “Although these deaths were adjudicated as noncardiovascular by the CEC [clinical events committee], our review showed that some of these patients had never really recovered from the initial procedure,” the researchers wrote.
In the early period, death rates were 3.3% for TAVR and 4.5% for SAVR, a nonsignificant difference. TAVR patients who died had higher rates of peripheral vascular disease and recent falls; SAVR patients who died were more likely to have had a pacemaker. In the late period, the death rates were 7.5% for TAVR and 7.7% for SAVR, and the researchers also found no significant difference in the number of cardiovascular deaths (4.4% and 4.2%, respectively). “Hierarchical causes of death were primarily due to other reasons deemed unrelated to the initial aortic valve replacement,” noted Dr. Gaudiani and his coauthors.
However, the study also found that TAVR patients were significantly more likely to go home after hospital discharge rather than to a rehabilitation facility or another hospital – 66.9% vs. 39.7% (P less than .001).
In the SAVR group, five cardiovascular deaths in the recovery period occurred because the operation failed to correct aortic stenosis – all related to placement of a valve too small for the patient. “Placing a valve appropriately sized to the patient should be a priority for surgeons if we are to improve our outcomes,” the researchers noted. “Most other deaths were the result of patients’ inability to cope with the physical trauma of surgery.”
Dr. Gaudiani disclosed that he is a consultant and paid instructor for Medtronic, St. Jude Medical, and Edwards Lifesciences. Coauthors disclosed relationships with Edwards Lifesciences, Terumo, Gore Medical, Medtronic, Boston Scientific, and other device companies.
FROM THE JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY
Key clinical point: Differences in survival between transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) in high-risk patients appear to be driven primarily by issues with disease repair and patient recovery from SAVR.
Major finding: During the recovery period (31-120 days) the death rate was 4% for TAVR vs. 7.9% for SAVR (P = .025).
Data source: Post hoc analysis of CoreValve US Pivotal High-Risk Trial involving 750 patients and 45 sites with outcomes reported through 3 years.
Disclosures: Dr. Gaudiani disclosed that he is a consultant and paid instructor for Medtronic, St. Jude Medical, and Edwards Lifesciences. Coauthors disclosed relationships with Edwards Lifesciences, Terumo, Gore Medical, Medtronic, Boston Scientific, and other device companies.
New trial shows thymectomy benefits myasthenia gravis
The effectiveness of thymectomy as a cure for myasthenia gravis has long been debated, but the publication of Myasthenia Gravis Thymectomy Treatment (MGTX) trial results, showing that thymectomy improved outcomes over 3 years in patients with nonthymomatous myasthenia gravis, has gone a long way toward settling the debate, Joshua R. Sonett, MD, and his coauthors noted in a feature expert opinion (J Thorac Cardiovasc Surg. 2017;154:306-9).
The MGTX trial randomized patients with nonthymomatous MG into two treatment groups: medical therapy alone or thymectomy with medical therapy (N Engl J Med. 2016;375:511-22). For uniformity, the study mandated one type of thymectomy, an extended transsternal approach. The study was 12 years in the making, with 6 years of patient accrual followed by 3 years of surveillance, Dr. Sonett and his coauthors noted.
Those markers include an average quantitative myasthenia score of 6.15 for the thymectomy group vs. 8.99 for the medical therapy group (P less than .0001); a lower dose of prednisone to attain improved neurologic status (44 mg vs. 60 mg; P less than .001); time-weighted average score on the Myasthenia Gravis Activities of Daily Living scale (2.24 vs. 3.41; P = .008); azathioprine use (17% vs. 48%; P less than .001); percentage of patients who had minimal-manifestation status at month 36 (67% vs. 47%; P = .03); and hospitalization for myasthenia-related symptoms (9% vs. 37%). “Interestingly,” the researchers wrote, “despite these quantitative results, no difference was seen in the quality of life measured surveys.”
An ancillary study, Bio-MGTX, was performed simultaneously to investigate pathologic and serum markers. “Many questions still need to be answered in regard to the role of thymectomy in MG,” Dr. Sonett and his coauthors maintained. They include an analysis of radiologic predictors of success with thymectomy, and the role of thymectomy in seronegative MG, ocular MG and elderly patients.
“Future studies may be directed at achieving a more rapid and consistent time to a complete symptom response,” they said.
The MGTX trial does support the use of high-dose prednisone induction combined with thymectomy to achieve higher complete early remission rates, but Bio-MGTX data may help to refine induction protocols. “The debate will likely continue in regard to widespread adoption of extended transsternal maximal thymectomy,” the researchers wrote. “What was categorically measured in this trial was the effect of maximal thymectomy, as sternotomy offers no particular independent therapeutic benefit.”
The structure of the MGTX trial despite its small cohort (126) “enabled the medical and surgical community to definitively answer an important question,” they noted. Nonetheless, further investigation of the role of thymectomy in MG is “sorely needed.”
Patients may need up to 3 years to achieve an optimal response, and complete cure in a shorter time frame should be the goal for each patient. Multimodal therapy should be the basis of MG treatment. “Continued progress in the management of MG will require diligent, multidisciplinary teams designing and completing prospective studies like the MGTX,” the researchers wrote.
Dr. Sonett and his coauthors had no financial relationships to disclose. The MGTX trial was funded by the U.S. National Institute of Neurological Disorders and Stroke. There was no commercial support for the trial.
In the MGTX trial, patients in the thymectomy group still needed a high average dose of prednisone, and the rates of remission may decrease over time, Michael K. Hsin, MD, of Queen Mary Hospital, Hong Kong, wrote in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:310-1). But he added that the trial did finally answer in a positive manner whether thymectomy could serve a beneficial role.
He also noted that the MGTX trial left at least four questions unanswered:
• The long-term effect of thymectomy on MG status with regard to future relapse.
• The role of surgery in the era of advances in medical treatment, including azathioprine to reduce the prednisone dose and emergence of stem-cell transplantation.
• The extent to which MGTX findings can be applied to acetylcholine receptor-negative pediatric patients.
• Whether alternative techniques to extended transsternal thymectomy can achieve comparable results.
Dr. Hsin had no financial relationships to disclose.
In the MGTX trial, patients in the thymectomy group still needed a high average dose of prednisone, and the rates of remission may decrease over time, Michael K. Hsin, MD, of Queen Mary Hospital, Hong Kong, wrote in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:310-1). But he added that the trial did finally answer in a positive manner whether thymectomy could serve a beneficial role.
He also noted that the MGTX trial left at least four questions unanswered:
• The long-term effect of thymectomy on MG status with regard to future relapse.
• The role of surgery in the era of advances in medical treatment, including azathioprine to reduce the prednisone dose and emergence of stem-cell transplantation.
• The extent to which MGTX findings can be applied to acetylcholine receptor-negative pediatric patients.
• Whether alternative techniques to extended transsternal thymectomy can achieve comparable results.
Dr. Hsin had no financial relationships to disclose.
In the MGTX trial, patients in the thymectomy group still needed a high average dose of prednisone, and the rates of remission may decrease over time, Michael K. Hsin, MD, of Queen Mary Hospital, Hong Kong, wrote in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:310-1). But he added that the trial did finally answer in a positive manner whether thymectomy could serve a beneficial role.
He also noted that the MGTX trial left at least four questions unanswered:
• The long-term effect of thymectomy on MG status with regard to future relapse.
• The role of surgery in the era of advances in medical treatment, including azathioprine to reduce the prednisone dose and emergence of stem-cell transplantation.
• The extent to which MGTX findings can be applied to acetylcholine receptor-negative pediatric patients.
• Whether alternative techniques to extended transsternal thymectomy can achieve comparable results.
Dr. Hsin had no financial relationships to disclose.
The effectiveness of thymectomy as a cure for myasthenia gravis has long been debated, but the publication of Myasthenia Gravis Thymectomy Treatment (MGTX) trial results, showing that thymectomy improved outcomes over 3 years in patients with nonthymomatous myasthenia gravis, has gone a long way toward settling the debate, Joshua R. Sonett, MD, and his coauthors noted in a feature expert opinion (J Thorac Cardiovasc Surg. 2017;154:306-9).
The MGTX trial randomized patients with nonthymomatous MG into two treatment groups: medical therapy alone or thymectomy with medical therapy (N Engl J Med. 2016;375:511-22). For uniformity, the study mandated one type of thymectomy, an extended transsternal approach. The study was 12 years in the making, with 6 years of patient accrual followed by 3 years of surveillance, Dr. Sonett and his coauthors noted.
Those markers include an average quantitative myasthenia score of 6.15 for the thymectomy group vs. 8.99 for the medical therapy group (P less than .0001); a lower dose of prednisone to attain improved neurologic status (44 mg vs. 60 mg; P less than .001); time-weighted average score on the Myasthenia Gravis Activities of Daily Living scale (2.24 vs. 3.41; P = .008); azathioprine use (17% vs. 48%; P less than .001); percentage of patients who had minimal-manifestation status at month 36 (67% vs. 47%; P = .03); and hospitalization for myasthenia-related symptoms (9% vs. 37%). “Interestingly,” the researchers wrote, “despite these quantitative results, no difference was seen in the quality of life measured surveys.”
An ancillary study, Bio-MGTX, was performed simultaneously to investigate pathologic and serum markers. “Many questions still need to be answered in regard to the role of thymectomy in MG,” Dr. Sonett and his coauthors maintained. They include an analysis of radiologic predictors of success with thymectomy, and the role of thymectomy in seronegative MG, ocular MG and elderly patients.
“Future studies may be directed at achieving a more rapid and consistent time to a complete symptom response,” they said.
The MGTX trial does support the use of high-dose prednisone induction combined with thymectomy to achieve higher complete early remission rates, but Bio-MGTX data may help to refine induction protocols. “The debate will likely continue in regard to widespread adoption of extended transsternal maximal thymectomy,” the researchers wrote. “What was categorically measured in this trial was the effect of maximal thymectomy, as sternotomy offers no particular independent therapeutic benefit.”
The structure of the MGTX trial despite its small cohort (126) “enabled the medical and surgical community to definitively answer an important question,” they noted. Nonetheless, further investigation of the role of thymectomy in MG is “sorely needed.”
Patients may need up to 3 years to achieve an optimal response, and complete cure in a shorter time frame should be the goal for each patient. Multimodal therapy should be the basis of MG treatment. “Continued progress in the management of MG will require diligent, multidisciplinary teams designing and completing prospective studies like the MGTX,” the researchers wrote.
Dr. Sonett and his coauthors had no financial relationships to disclose. The MGTX trial was funded by the U.S. National Institute of Neurological Disorders and Stroke. There was no commercial support for the trial.
The effectiveness of thymectomy as a cure for myasthenia gravis has long been debated, but the publication of Myasthenia Gravis Thymectomy Treatment (MGTX) trial results, showing that thymectomy improved outcomes over 3 years in patients with nonthymomatous myasthenia gravis, has gone a long way toward settling the debate, Joshua R. Sonett, MD, and his coauthors noted in a feature expert opinion (J Thorac Cardiovasc Surg. 2017;154:306-9).
The MGTX trial randomized patients with nonthymomatous MG into two treatment groups: medical therapy alone or thymectomy with medical therapy (N Engl J Med. 2016;375:511-22). For uniformity, the study mandated one type of thymectomy, an extended transsternal approach. The study was 12 years in the making, with 6 years of patient accrual followed by 3 years of surveillance, Dr. Sonett and his coauthors noted.
Those markers include an average quantitative myasthenia score of 6.15 for the thymectomy group vs. 8.99 for the medical therapy group (P less than .0001); a lower dose of prednisone to attain improved neurologic status (44 mg vs. 60 mg; P less than .001); time-weighted average score on the Myasthenia Gravis Activities of Daily Living scale (2.24 vs. 3.41; P = .008); azathioprine use (17% vs. 48%; P less than .001); percentage of patients who had minimal-manifestation status at month 36 (67% vs. 47%; P = .03); and hospitalization for myasthenia-related symptoms (9% vs. 37%). “Interestingly,” the researchers wrote, “despite these quantitative results, no difference was seen in the quality of life measured surveys.”
An ancillary study, Bio-MGTX, was performed simultaneously to investigate pathologic and serum markers. “Many questions still need to be answered in regard to the role of thymectomy in MG,” Dr. Sonett and his coauthors maintained. They include an analysis of radiologic predictors of success with thymectomy, and the role of thymectomy in seronegative MG, ocular MG and elderly patients.
“Future studies may be directed at achieving a more rapid and consistent time to a complete symptom response,” they said.
The MGTX trial does support the use of high-dose prednisone induction combined with thymectomy to achieve higher complete early remission rates, but Bio-MGTX data may help to refine induction protocols. “The debate will likely continue in regard to widespread adoption of extended transsternal maximal thymectomy,” the researchers wrote. “What was categorically measured in this trial was the effect of maximal thymectomy, as sternotomy offers no particular independent therapeutic benefit.”
The structure of the MGTX trial despite its small cohort (126) “enabled the medical and surgical community to definitively answer an important question,” they noted. Nonetheless, further investigation of the role of thymectomy in MG is “sorely needed.”
Patients may need up to 3 years to achieve an optimal response, and complete cure in a shorter time frame should be the goal for each patient. Multimodal therapy should be the basis of MG treatment. “Continued progress in the management of MG will require diligent, multidisciplinary teams designing and completing prospective studies like the MGTX,” the researchers wrote.
Dr. Sonett and his coauthors had no financial relationships to disclose. The MGTX trial was funded by the U.S. National Institute of Neurological Disorders and Stroke. There was no commercial support for the trial.
FROM THE JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY
Key clinical point: A recently published prospective randomized trial provides definitive evidence that thymectomy significantly improves outcomes of patients with myasthenia gravis.
Major finding: Patients who underwent thymectomy had an average quantitative myasthenia score of 6.15 vs. 8.99 for the medical therapy group, a significant difference.
Data source: Myasthenia Gravis Thymectomy Trial, a prospective trial of 126 patients randomized to thymectomy with medical therapy or medical therapy alone.
Disclosures: Dr. Sonett and his coauthors had no financial relationships to disclose. The MGTX trial was funded by the U.S. National Institute of Neurological Disorders and Stroke. There was no commercial support for the trial.
Pulmonary metastasectomy may be useful for soft-tissue sarcoma spread
The rate of soft-tissue sarcoma has nearly doubled over the past two decades, and up to 50% of patients with tissue sarcoma develop lung metastasis. A single-center study of 539 patients who had treatment for soft-tissue sarcoma has revealed disease and treatment characteristics that may aid patient selection and help predict overall and disease-free survival after diagnosis and treatment.
“Histologic subtype and size of the primary tumor were significantly associated with overall survival,” said lead author Neel P. Chudgar, MD, and his coauthors in the July issue of the Journal of Thoracic and Cardiovascular Surgery (2017;154:319-30).
“Patients who underwent pulmonary metastasectomy [PM] for pleomorphic sarcoma/malignant fibrous histocytoma had the shortest median overall survival (23.6 months), whereas those who underwent PM for leiomyosarcoma had a median overall survival of 42 months,” he said.
The study subjects had pulmonary metastasectomies at Memorial Sloan Kettering Cancer Center, New York, during September 1991–June 2014. The median overall survival was 33.2 months, and median disease-free survival was 6.8 months for the entire cohort.
Among the disease characteristics associated with a lower hazard ratio of death shown by multivariable analyses were leiomyosarcoma histologic subtype (HR, 0.57), primary tumor size of 10 cm or less (HR, 1.00 vs. HR, 1.37 for those greater than 10 cm), increasing time from primary tumor resection to development of metastases (HR, 0.4 at less than 24 months vs. 1.0 at less than 6 months), solitary lung metastasis (HR, 1.0 vs. 1.8 for one year or more), and minimally invasive resection (HR, 0.71), all of which were statistically significant differences. Disease-free interval of more than one year and one pulmonary metastasis were significantly associated with lower hazard of disease recurrence.
Of patients, 70% had pulmonary metastasectomy as their primary treatment. The remainder had induction chemotherapy. In addition, 71% had open procedures over the 23-year study period, but minimally invasive operations became more common with time, increasing more than fourfold from the first half of the study period, vs. the last. They accounted for more than half of all procedures in the last five years of the study.
With regard to tumor type, fibrosarcoma was associated with longest median overall survival (65.2 months). Dr. Chudgar and his colleagues noted that 43% of these patients had low-grade primary tumors. Patients with low-grade tumors of all types had a median overall survival of 71.8 months, vs. 30.8 months for those with high-grade tumors.
“Our results indicate that therapeutic-intent pulmonary metastasectomy for soft-tissue sarcoma can be associated with prolonged survival,” Dr. Chudgar and his coauthors said. “The median survivals in our study are comparable with those in previous studies.” However, their analysis went beyond previous studies because they identified positive prognostic factors.
Dr. Chudgar and his coauthors acknowledge that various studies have drawn conflicting conclusions about the validity of histologic subtype as a prognostic factor, but their study differs from previous studies because it is a single-center cohort, “which increases the power to potentially identify significant differences, and we focused on soft-tissue sarcoma exclusively to enhance the homogeneity of the study population.”
Nonetheless, the researchers noted some limitations of their study, namely their collective analysis of the various soft-tissue sarcoma subtypes and the lack of a control group. Soft tissue sarcoma, because of its heterogeneous nature, challenges the adoption of precision medicine for this cancer type, but, until clinicians better understand the underlying mechanism of metastasis in these tumor types, Dr. Chudgar and his coauthors said, pulmonary metastasectomy “remains the best available treatment for soft tissue sarcoma pulmonary metastases.”
Dr. Chudgar and his coauthors had no financial relationships to disclose.
The findings that surgery for pulmonary metastases achieves “relatively good median survival” that Dr. Chudgar and coauthors reported are “especially impressive when considering that more than 25% of these patients with metastatic cancer had five or more pulmonary lesions,” said Mark F. Berry, MD, MHS, of Stanford University in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:117-8).
Dr. Berry also said, however, that surgeons still must consider these results cautiously for several reasons. One, the study is retrospective and uncontrolled. Two, the study does not address whether the researchers selected healthy patients “with favorable disease characteristics” for pulmonary metastasectomy. “The sobering reality is that most patients still had recurrence relatively soon after complete pulmonary resection,” Dr. Berry said.
The study does support the current practice of pulmonary metastasectomy, which many patients may prefer for its invasive nature, compared with systemic chemotherapy treatment, he said. “Overall, surgeons can use this study to aid patient selection [and] to support the clinical decision to pursue resection of soft-tissue sarcoma pulmonary metastases for patients judged to be appropriate surgical candidates,” Dr. Berry concluded.
Dr. Berry had reported no financial disclosures.
The findings that surgery for pulmonary metastases achieves “relatively good median survival” that Dr. Chudgar and coauthors reported are “especially impressive when considering that more than 25% of these patients with metastatic cancer had five or more pulmonary lesions,” said Mark F. Berry, MD, MHS, of Stanford University in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:117-8).
Dr. Berry also said, however, that surgeons still must consider these results cautiously for several reasons. One, the study is retrospective and uncontrolled. Two, the study does not address whether the researchers selected healthy patients “with favorable disease characteristics” for pulmonary metastasectomy. “The sobering reality is that most patients still had recurrence relatively soon after complete pulmonary resection,” Dr. Berry said.
The study does support the current practice of pulmonary metastasectomy, which many patients may prefer for its invasive nature, compared with systemic chemotherapy treatment, he said. “Overall, surgeons can use this study to aid patient selection [and] to support the clinical decision to pursue resection of soft-tissue sarcoma pulmonary metastases for patients judged to be appropriate surgical candidates,” Dr. Berry concluded.
Dr. Berry had reported no financial disclosures.
The findings that surgery for pulmonary metastases achieves “relatively good median survival” that Dr. Chudgar and coauthors reported are “especially impressive when considering that more than 25% of these patients with metastatic cancer had five or more pulmonary lesions,” said Mark F. Berry, MD, MHS, of Stanford University in his invited commentary (J Thorac Cardiovasc Surg. 2017;154:117-8).
Dr. Berry also said, however, that surgeons still must consider these results cautiously for several reasons. One, the study is retrospective and uncontrolled. Two, the study does not address whether the researchers selected healthy patients “with favorable disease characteristics” for pulmonary metastasectomy. “The sobering reality is that most patients still had recurrence relatively soon after complete pulmonary resection,” Dr. Berry said.
The study does support the current practice of pulmonary metastasectomy, which many patients may prefer for its invasive nature, compared with systemic chemotherapy treatment, he said. “Overall, surgeons can use this study to aid patient selection [and] to support the clinical decision to pursue resection of soft-tissue sarcoma pulmonary metastases for patients judged to be appropriate surgical candidates,” Dr. Berry concluded.
Dr. Berry had reported no financial disclosures.
The rate of soft-tissue sarcoma has nearly doubled over the past two decades, and up to 50% of patients with tissue sarcoma develop lung metastasis. A single-center study of 539 patients who had treatment for soft-tissue sarcoma has revealed disease and treatment characteristics that may aid patient selection and help predict overall and disease-free survival after diagnosis and treatment.
“Histologic subtype and size of the primary tumor were significantly associated with overall survival,” said lead author Neel P. Chudgar, MD, and his coauthors in the July issue of the Journal of Thoracic and Cardiovascular Surgery (2017;154:319-30).
“Patients who underwent pulmonary metastasectomy [PM] for pleomorphic sarcoma/malignant fibrous histocytoma had the shortest median overall survival (23.6 months), whereas those who underwent PM for leiomyosarcoma had a median overall survival of 42 months,” he said.
The study subjects had pulmonary metastasectomies at Memorial Sloan Kettering Cancer Center, New York, during September 1991–June 2014. The median overall survival was 33.2 months, and median disease-free survival was 6.8 months for the entire cohort.
Among the disease characteristics associated with a lower hazard ratio of death shown by multivariable analyses were leiomyosarcoma histologic subtype (HR, 0.57), primary tumor size of 10 cm or less (HR, 1.00 vs. HR, 1.37 for those greater than 10 cm), increasing time from primary tumor resection to development of metastases (HR, 0.4 at less than 24 months vs. 1.0 at less than 6 months), solitary lung metastasis (HR, 1.0 vs. 1.8 for one year or more), and minimally invasive resection (HR, 0.71), all of which were statistically significant differences. Disease-free interval of more than one year and one pulmonary metastasis were significantly associated with lower hazard of disease recurrence.
Of patients, 70% had pulmonary metastasectomy as their primary treatment. The remainder had induction chemotherapy. In addition, 71% had open procedures over the 23-year study period, but minimally invasive operations became more common with time, increasing more than fourfold from the first half of the study period, vs. the last. They accounted for more than half of all procedures in the last five years of the study.
With regard to tumor type, fibrosarcoma was associated with longest median overall survival (65.2 months). Dr. Chudgar and his colleagues noted that 43% of these patients had low-grade primary tumors. Patients with low-grade tumors of all types had a median overall survival of 71.8 months, vs. 30.8 months for those with high-grade tumors.
“Our results indicate that therapeutic-intent pulmonary metastasectomy for soft-tissue sarcoma can be associated with prolonged survival,” Dr. Chudgar and his coauthors said. “The median survivals in our study are comparable with those in previous studies.” However, their analysis went beyond previous studies because they identified positive prognostic factors.
Dr. Chudgar and his coauthors acknowledge that various studies have drawn conflicting conclusions about the validity of histologic subtype as a prognostic factor, but their study differs from previous studies because it is a single-center cohort, “which increases the power to potentially identify significant differences, and we focused on soft-tissue sarcoma exclusively to enhance the homogeneity of the study population.”
Nonetheless, the researchers noted some limitations of their study, namely their collective analysis of the various soft-tissue sarcoma subtypes and the lack of a control group. Soft tissue sarcoma, because of its heterogeneous nature, challenges the adoption of precision medicine for this cancer type, but, until clinicians better understand the underlying mechanism of metastasis in these tumor types, Dr. Chudgar and his coauthors said, pulmonary metastasectomy “remains the best available treatment for soft tissue sarcoma pulmonary metastases.”
Dr. Chudgar and his coauthors had no financial relationships to disclose.
The rate of soft-tissue sarcoma has nearly doubled over the past two decades, and up to 50% of patients with tissue sarcoma develop lung metastasis. A single-center study of 539 patients who had treatment for soft-tissue sarcoma has revealed disease and treatment characteristics that may aid patient selection and help predict overall and disease-free survival after diagnosis and treatment.
“Histologic subtype and size of the primary tumor were significantly associated with overall survival,” said lead author Neel P. Chudgar, MD, and his coauthors in the July issue of the Journal of Thoracic and Cardiovascular Surgery (2017;154:319-30).
“Patients who underwent pulmonary metastasectomy [PM] for pleomorphic sarcoma/malignant fibrous histocytoma had the shortest median overall survival (23.6 months), whereas those who underwent PM for leiomyosarcoma had a median overall survival of 42 months,” he said.
The study subjects had pulmonary metastasectomies at Memorial Sloan Kettering Cancer Center, New York, during September 1991–June 2014. The median overall survival was 33.2 months, and median disease-free survival was 6.8 months for the entire cohort.
Among the disease characteristics associated with a lower hazard ratio of death shown by multivariable analyses were leiomyosarcoma histologic subtype (HR, 0.57), primary tumor size of 10 cm or less (HR, 1.00 vs. HR, 1.37 for those greater than 10 cm), increasing time from primary tumor resection to development of metastases (HR, 0.4 at less than 24 months vs. 1.0 at less than 6 months), solitary lung metastasis (HR, 1.0 vs. 1.8 for one year or more), and minimally invasive resection (HR, 0.71), all of which were statistically significant differences. Disease-free interval of more than one year and one pulmonary metastasis were significantly associated with lower hazard of disease recurrence.
Of patients, 70% had pulmonary metastasectomy as their primary treatment. The remainder had induction chemotherapy. In addition, 71% had open procedures over the 23-year study period, but minimally invasive operations became more common with time, increasing more than fourfold from the first half of the study period, vs. the last. They accounted for more than half of all procedures in the last five years of the study.
With regard to tumor type, fibrosarcoma was associated with longest median overall survival (65.2 months). Dr. Chudgar and his colleagues noted that 43% of these patients had low-grade primary tumors. Patients with low-grade tumors of all types had a median overall survival of 71.8 months, vs. 30.8 months for those with high-grade tumors.
“Our results indicate that therapeutic-intent pulmonary metastasectomy for soft-tissue sarcoma can be associated with prolonged survival,” Dr. Chudgar and his coauthors said. “The median survivals in our study are comparable with those in previous studies.” However, their analysis went beyond previous studies because they identified positive prognostic factors.
Dr. Chudgar and his coauthors acknowledge that various studies have drawn conflicting conclusions about the validity of histologic subtype as a prognostic factor, but their study differs from previous studies because it is a single-center cohort, “which increases the power to potentially identify significant differences, and we focused on soft-tissue sarcoma exclusively to enhance the homogeneity of the study population.”
Nonetheless, the researchers noted some limitations of their study, namely their collective analysis of the various soft-tissue sarcoma subtypes and the lack of a control group. Soft tissue sarcoma, because of its heterogeneous nature, challenges the adoption of precision medicine for this cancer type, but, until clinicians better understand the underlying mechanism of metastasis in these tumor types, Dr. Chudgar and his coauthors said, pulmonary metastasectomy “remains the best available treatment for soft tissue sarcoma pulmonary metastases.”
Dr. Chudgar and his coauthors had no financial relationships to disclose.
FROM THE JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY
Key clinical point: Characteristics that determine survival in patients with sarcomatous pulmonary metastases are tumor subtype and size, number of and time to metastases, and minimally invasive surgery.
Major finding: Patients with leiomyosarcoma histologic subtype tumor had a hazard ratio of 0.57 (P = .001), and those with a primary tumor size of 10 cm or less had an HR of 1, vs. an HR of 1.37 for those greater than 10 cm (P = .006)
Data source: A single-institution study of 539 patients who had pulmonary mastectomy for metastatic soft tissue sarcoma from September 1991 to June 2014.
Disclosures: Dr. Chudgar and his coauthors had no financial relationships to disclose.
Outcomes/costs similar for minimally invasive vs. sternotomy-based mitral surgery
NEW YORK – Minimally invasive mitral valve surgery provides outcomes that match those of conventional sternotomy without increasing use of resources, and lower costs after surgery offset potentially higher operation costs, according to a single-center, propensity-matched analysis of almost 500 patients presented at the meeting sponsored by the American Association for Thoracic Surgery.
“Minimally invasive mitral surgery has excellent outcomes with fewer transfusions and less time ventilated in this representative cohort,” said Robert Hawkins, MD, of the University of Virginia, Charlottesville, in reporting the results.
“While operative times were longer, surgical costs remained statistically similar, and minimally invasive mitral surgery was associated with similar total costs in more complex mitral cases.”
Dr. Hawkins said this study included higher risk patients to attempt to overcome shortcomings of previously published reports that skewed toward lower-risk, highly selective mitral repairs for degenerative mitral disease. “They’re not really representative of the current state of minimally invasive mitral valve surgery as it currently stands in the higher risk patient population,” he said of previous studies.
Major outcomes were similar in both groups. “The mitral valve repair rate was about 81% for both groups, and the tricuspid valve repair rate was 8.8%,” Dr. Hawkins said. “About 35% had atrial fibrillation surgery, including both ablation and left atrial appendage ligation.”
Dr. Hawkins characterized outcomes in both surgical groups as “excellent,” and added, “The operative mortality rate was 1.3% and the major morbidity rate was 11% and not different between groups.”
Some key operative characteristics differed between the two groups. “As expected the cross clamp times and bypass times for the minimally invasive approaches were longer,” Dr. Hawkins said. Also, those who had minimally invasive mitral surgery had a “dramatic decrease” in transfusion rates.
With regard to resource utilization, minimally invasive surgery had longer operative times – an average of 291 minutes vs. 222 minutes (P less than .0001) – but similar or improved use of postoperative resources. “We see that the minimally invasive approach leads to decreased treatment and ancillary costs without a statistically significant difference in surgical costs despite the longer operative times,” Dr. Hawkins said.
However, he noted the high variability of total hospital costs in higher-risk populations complicate any head-to-head comparisons of resource utilization between the conventional and minimally invasive approaches, so the researchers attempted to drill down to identify predictors of resource use. Using a regression model, they found that minimally invasive approach may actually save money, although this finding was not statistically significant (–$1,524; P = 0.83).
“We see that the major drivers of costs are complications,” Dr. Hawkins said. “Morbidity and mortality led to a $54,000 cost increase, and the addition of tricuspid repair also led to about $60,000 higher costs, which is more likely related to higher risk and thus complications. The costs of higher-acuity cases are driven by the complications and not the approach.”
Dr. Hawkins reported no financial relationships. Dr. Ailawadi disclosed consulting agreements with Edwards Lifesciences, Abbott, Medtronic, and AtriCure.
NEW YORK – Minimally invasive mitral valve surgery provides outcomes that match those of conventional sternotomy without increasing use of resources, and lower costs after surgery offset potentially higher operation costs, according to a single-center, propensity-matched analysis of almost 500 patients presented at the meeting sponsored by the American Association for Thoracic Surgery.
“Minimally invasive mitral surgery has excellent outcomes with fewer transfusions and less time ventilated in this representative cohort,” said Robert Hawkins, MD, of the University of Virginia, Charlottesville, in reporting the results.
“While operative times were longer, surgical costs remained statistically similar, and minimally invasive mitral surgery was associated with similar total costs in more complex mitral cases.”
Dr. Hawkins said this study included higher risk patients to attempt to overcome shortcomings of previously published reports that skewed toward lower-risk, highly selective mitral repairs for degenerative mitral disease. “They’re not really representative of the current state of minimally invasive mitral valve surgery as it currently stands in the higher risk patient population,” he said of previous studies.
Major outcomes were similar in both groups. “The mitral valve repair rate was about 81% for both groups, and the tricuspid valve repair rate was 8.8%,” Dr. Hawkins said. “About 35% had atrial fibrillation surgery, including both ablation and left atrial appendage ligation.”
Dr. Hawkins characterized outcomes in both surgical groups as “excellent,” and added, “The operative mortality rate was 1.3% and the major morbidity rate was 11% and not different between groups.”
Some key operative characteristics differed between the two groups. “As expected the cross clamp times and bypass times for the minimally invasive approaches were longer,” Dr. Hawkins said. Also, those who had minimally invasive mitral surgery had a “dramatic decrease” in transfusion rates.
With regard to resource utilization, minimally invasive surgery had longer operative times – an average of 291 minutes vs. 222 minutes (P less than .0001) – but similar or improved use of postoperative resources. “We see that the minimally invasive approach leads to decreased treatment and ancillary costs without a statistically significant difference in surgical costs despite the longer operative times,” Dr. Hawkins said.
However, he noted the high variability of total hospital costs in higher-risk populations complicate any head-to-head comparisons of resource utilization between the conventional and minimally invasive approaches, so the researchers attempted to drill down to identify predictors of resource use. Using a regression model, they found that minimally invasive approach may actually save money, although this finding was not statistically significant (–$1,524; P = 0.83).
“We see that the major drivers of costs are complications,” Dr. Hawkins said. “Morbidity and mortality led to a $54,000 cost increase, and the addition of tricuspid repair also led to about $60,000 higher costs, which is more likely related to higher risk and thus complications. The costs of higher-acuity cases are driven by the complications and not the approach.”
Dr. Hawkins reported no financial relationships. Dr. Ailawadi disclosed consulting agreements with Edwards Lifesciences, Abbott, Medtronic, and AtriCure.
NEW YORK – Minimally invasive mitral valve surgery provides outcomes that match those of conventional sternotomy without increasing use of resources, and lower costs after surgery offset potentially higher operation costs, according to a single-center, propensity-matched analysis of almost 500 patients presented at the meeting sponsored by the American Association for Thoracic Surgery.
“Minimally invasive mitral surgery has excellent outcomes with fewer transfusions and less time ventilated in this representative cohort,” said Robert Hawkins, MD, of the University of Virginia, Charlottesville, in reporting the results.
“While operative times were longer, surgical costs remained statistically similar, and minimally invasive mitral surgery was associated with similar total costs in more complex mitral cases.”
Dr. Hawkins said this study included higher risk patients to attempt to overcome shortcomings of previously published reports that skewed toward lower-risk, highly selective mitral repairs for degenerative mitral disease. “They’re not really representative of the current state of minimally invasive mitral valve surgery as it currently stands in the higher risk patient population,” he said of previous studies.
Major outcomes were similar in both groups. “The mitral valve repair rate was about 81% for both groups, and the tricuspid valve repair rate was 8.8%,” Dr. Hawkins said. “About 35% had atrial fibrillation surgery, including both ablation and left atrial appendage ligation.”
Dr. Hawkins characterized outcomes in both surgical groups as “excellent,” and added, “The operative mortality rate was 1.3% and the major morbidity rate was 11% and not different between groups.”
Some key operative characteristics differed between the two groups. “As expected the cross clamp times and bypass times for the minimally invasive approaches were longer,” Dr. Hawkins said. Also, those who had minimally invasive mitral surgery had a “dramatic decrease” in transfusion rates.
With regard to resource utilization, minimally invasive surgery had longer operative times – an average of 291 minutes vs. 222 minutes (P less than .0001) – but similar or improved use of postoperative resources. “We see that the minimally invasive approach leads to decreased treatment and ancillary costs without a statistically significant difference in surgical costs despite the longer operative times,” Dr. Hawkins said.
However, he noted the high variability of total hospital costs in higher-risk populations complicate any head-to-head comparisons of resource utilization between the conventional and minimally invasive approaches, so the researchers attempted to drill down to identify predictors of resource use. Using a regression model, they found that minimally invasive approach may actually save money, although this finding was not statistically significant (–$1,524; P = 0.83).
“We see that the major drivers of costs are complications,” Dr. Hawkins said. “Morbidity and mortality led to a $54,000 cost increase, and the addition of tricuspid repair also led to about $60,000 higher costs, which is more likely related to higher risk and thus complications. The costs of higher-acuity cases are driven by the complications and not the approach.”
Dr. Hawkins reported no financial relationships. Dr. Ailawadi disclosed consulting agreements with Edwards Lifesciences, Abbott, Medtronic, and AtriCure.
AT THE 2017 MITRAL VALVE CONCLAVE
Key clinical point: Outcomes and costs of minimally invasive mitral surgery are similar to that of conventional sternotomy for mitral valve surgery.
Major finding: Mortality rates of 1.3% and major morbidity rates of 11% were similar in both groups.
Data source: Propensity-matched analysis of 479 patients who had a primary mitral valve operation from January 2010 to June 2016 at the University of Virginia.
Disclosures: Dr. Hawkins reported no financial disclosures. Coauthor Dr. Gorav Ailawadi disclosed consulting agreements with Edwards Lifesciences, Abbott, Medtronic, and AtriCure.
Concomitant MIMV-TVS no worse than MIMV alone
NEW YORK – Concurrent mitral-tricuspid valve surgery has similar outcomes to isolated minimally invasive mitral valve surgery, according to results of a 12-year review reported at the 2017 Mitral Valve Conclave, sponsored by the American Association for Thoracic Surgery.
Indications for minimally invasive tricuspid valve surgery done at the same time of mitral valve surgery have not been well established, in part because the outcomes of such combined procedures have been underreported.
Dr. Kilic noted that patients who had concomitant TVS were typically higher risk at baseline. “The concomitant group was older, had a higher percentage of female patients, and higher rates of chronic lung disease and cerebrovascular disease as well,” Dr. Kilic said. In comparing the isolated MIMV surgery and MIMV-TVS groups in the unmatched analysis, 9% vs. 14% had chronic lung disease (P = .05), 12% vs. 16% had coronary artery disease (P = .15), 7% vs. 12% had cerebrovascular disease (P = .04), and 93% vs. 90% had elective surgery (P = .18). The majority of tricuspid repairs were for severe tricuspid regurgitation (TR) or moderate TR with a dilated annulus of 40 mm or greater.
The operative characteristics differed significantly between the two groups. “As one might expect, the cardiopulmonary bypass time and aortic occlusion times were longer in the concomitant group; and balloon aortic occlusion was used in more than 70% in each cohort,” Dr. Kilic said. Those differences were similar in the propensity-matched cohort: bypass times were 147.5 minutes for isolated MIMV surgery and 174.6 minutes for MIMV-TVS (P less than .001); and aortic occlusion time 104.8 vs. 128 minutes (P less than .001), respectively.
Operative mortality was 3% for isolated MIMV surgery and 4% for concurrent MIMV-TVS (P = .73), but the isolated MIMV surgery group required fewer permanent pacemakers, 1% vs. 6% (P = .03).
“Aside from permanent pacemaker implantation, the rates of every other complication were similar, including stoke, limb ischemia, atrial fibrillation, gastrointestinal complications, respiratory complications, blood product transfusions as well as discharge to home rates,” Dr. Kilic said. Median hospital length of stays were also similar: 7 days for isolated MIMV surgery vs. 8 days for MIMV-TVS (P = .13).
One limitation of the study Dr. Kilic pointed out was that the decision to perform concomitant MIMV-TVS was surgeon dependent.
Dr. Kilic reported having no financial disclosures.
NEW YORK – Concurrent mitral-tricuspid valve surgery has similar outcomes to isolated minimally invasive mitral valve surgery, according to results of a 12-year review reported at the 2017 Mitral Valve Conclave, sponsored by the American Association for Thoracic Surgery.
Indications for minimally invasive tricuspid valve surgery done at the same time of mitral valve surgery have not been well established, in part because the outcomes of such combined procedures have been underreported.
Dr. Kilic noted that patients who had concomitant TVS were typically higher risk at baseline. “The concomitant group was older, had a higher percentage of female patients, and higher rates of chronic lung disease and cerebrovascular disease as well,” Dr. Kilic said. In comparing the isolated MIMV surgery and MIMV-TVS groups in the unmatched analysis, 9% vs. 14% had chronic lung disease (P = .05), 12% vs. 16% had coronary artery disease (P = .15), 7% vs. 12% had cerebrovascular disease (P = .04), and 93% vs. 90% had elective surgery (P = .18). The majority of tricuspid repairs were for severe tricuspid regurgitation (TR) or moderate TR with a dilated annulus of 40 mm or greater.
The operative characteristics differed significantly between the two groups. “As one might expect, the cardiopulmonary bypass time and aortic occlusion times were longer in the concomitant group; and balloon aortic occlusion was used in more than 70% in each cohort,” Dr. Kilic said. Those differences were similar in the propensity-matched cohort: bypass times were 147.5 minutes for isolated MIMV surgery and 174.6 minutes for MIMV-TVS (P less than .001); and aortic occlusion time 104.8 vs. 128 minutes (P less than .001), respectively.
Operative mortality was 3% for isolated MIMV surgery and 4% for concurrent MIMV-TVS (P = .73), but the isolated MIMV surgery group required fewer permanent pacemakers, 1% vs. 6% (P = .03).
“Aside from permanent pacemaker implantation, the rates of every other complication were similar, including stoke, limb ischemia, atrial fibrillation, gastrointestinal complications, respiratory complications, blood product transfusions as well as discharge to home rates,” Dr. Kilic said. Median hospital length of stays were also similar: 7 days for isolated MIMV surgery vs. 8 days for MIMV-TVS (P = .13).
One limitation of the study Dr. Kilic pointed out was that the decision to perform concomitant MIMV-TVS was surgeon dependent.
Dr. Kilic reported having no financial disclosures.
NEW YORK – Concurrent mitral-tricuspid valve surgery has similar outcomes to isolated minimally invasive mitral valve surgery, according to results of a 12-year review reported at the 2017 Mitral Valve Conclave, sponsored by the American Association for Thoracic Surgery.
Indications for minimally invasive tricuspid valve surgery done at the same time of mitral valve surgery have not been well established, in part because the outcomes of such combined procedures have been underreported.
Dr. Kilic noted that patients who had concomitant TVS were typically higher risk at baseline. “The concomitant group was older, had a higher percentage of female patients, and higher rates of chronic lung disease and cerebrovascular disease as well,” Dr. Kilic said. In comparing the isolated MIMV surgery and MIMV-TVS groups in the unmatched analysis, 9% vs. 14% had chronic lung disease (P = .05), 12% vs. 16% had coronary artery disease (P = .15), 7% vs. 12% had cerebrovascular disease (P = .04), and 93% vs. 90% had elective surgery (P = .18). The majority of tricuspid repairs were for severe tricuspid regurgitation (TR) or moderate TR with a dilated annulus of 40 mm or greater.
The operative characteristics differed significantly between the two groups. “As one might expect, the cardiopulmonary bypass time and aortic occlusion times were longer in the concomitant group; and balloon aortic occlusion was used in more than 70% in each cohort,” Dr. Kilic said. Those differences were similar in the propensity-matched cohort: bypass times were 147.5 minutes for isolated MIMV surgery and 174.6 minutes for MIMV-TVS (P less than .001); and aortic occlusion time 104.8 vs. 128 minutes (P less than .001), respectively.
Operative mortality was 3% for isolated MIMV surgery and 4% for concurrent MIMV-TVS (P = .73), but the isolated MIMV surgery group required fewer permanent pacemakers, 1% vs. 6% (P = .03).
“Aside from permanent pacemaker implantation, the rates of every other complication were similar, including stoke, limb ischemia, atrial fibrillation, gastrointestinal complications, respiratory complications, blood product transfusions as well as discharge to home rates,” Dr. Kilic said. Median hospital length of stays were also similar: 7 days for isolated MIMV surgery vs. 8 days for MIMV-TVS (P = .13).
One limitation of the study Dr. Kilic pointed out was that the decision to perform concomitant MIMV-TVS was surgeon dependent.
Dr. Kilic reported having no financial disclosures.
AT THE 2017 MITRAL VALVE CONCLAVE
Key clinical point: Outcomes of isolated minimally invasive mitral valve surgery (MIMV) and MIMV with concomitant tricuspid valve surgery (TVS) are similar.
Major finding: Operative mortality was 3% for isolated MIMV and 4% for concurrent MIMV-TVS.
Data source: Single-center review of 1,158 patients who underwent either isolated MIMV or MIMV-TVS from 2002 to 2014, including a propensity-matched cohort.
Disclosures: Dr. Kilic reported having no financial disclosures.
MV disease in children requires modified strategies
NEW YORK – Repairing mitral valves in pediatric patients must overcome two issues: the wide variability in their anatomy and their growth. Using strategies and techniques common in adult mitral surgery can accomplish good mitral valve function in children, but some techniques in children differ, like using combined resorbable material with autologous tissue or transferring native chords instead of placing artificial chords to a malfunctioning leaflet.
Pedro del Nido, MD, of Boston Children’s Hospital, said the spectrum of mitral valve pathology in children goes from congenital mitral stenosis with a thick annulus with leaflet immobility to leaflet hypermobility that involves anterior leaflet prolapse and can involve a cleft that causes regurgitation. Dr. del Nido explained his surgical approaches for mitral valve disease in children at the 2017 Mitral Conclave, sponsored by the American Association of Thoracic Surgery.
Accessing the mitral valve in children requires a different approach than in adults, Dr. del Nido said. “Going through the left atrium is generally difficult, so we often enter through a trans-septal incision,” he said. “The main reason for that is because the tricuspid valve is often associated with the mitral valve problem and this gives us the most direct exposure.”
Once the surgeon gains exposure, the surgical analysis for a diseased adult or child valve is almost identical, with the exception that adult disease is acquired whereas childhood disease tends to be congenital, Dr. del Nido said. “In the congenital patient, we often find fibroelastic tissue that the child is born with,” he said. “We see this in neonates and young infants. It thickens over time; it doesn’t often calcify, but it does often restrict the leaflets and it tends to fuse the chords, so in essence you have direct attachments of the leaflets to the papillaries.”
He explained that this pathology requires an approach similar to that for rheumatic mitral disease in adults. “Start splitting the commissures and start resecting the tissue off the chords creating fenestrations in order to improve the inflow.” Dr. del Nido added, “If you don’t do this, the child will always have a gradient, and if you think about an adult having problems and symptoms with a gradient, think about a 10-year-old running around trying to do athletics; it’s impossible.”
Dysfunctional chords also require a somewhat different approach in children than they require in adults. “We find elongation of the chords and the anterior support structure is abnormal; the secondary chords are totally intact,” Dr. del Nido said. When confronting a torn-edge chord, resection is often an option in adults, but is uncommon in children. “We don’t usually have very much leaflet tissue,” he said. Artificial chords do not accommodate growth.
“We tend to use native tissue,” said Dr. del Nido. “You can transfer the strut chord; you can transfer the secondary chord in order to achieve support for the edge of that prolapsed leaflet.”
Leaflet problems are probably the biggest single source of recurrence in children, Dr. del Nido said. A cleft on the anterior leaflet can be particularly vexing. For example, cleft edges attached to the septum can prevent the valve leaflet from coaptation with the posterior leaflet. “If you don’t recognize that on 3-D echocardiography, you’re going to have a problem; that leaflet will never create the coaptation surface that you want,” he said.
The solution may lie underneath the leaflet. Said Dr. del Nido, “We tend to want to close a cleft, and, yes, that will get you relief of regurgitation in the central portion, but if you end up with immobility of that leaflet, then look underneath. Most often there are very abnormal attachments to the edges of that cleft to the septum. You have to get rid of that; if you don’t resect all that, you’ll never have a leaflet that truly floats up to coapt against the posterior leaflet.”
Annular dilation in children can also challenge a cardiothoracic surgeon’s skill.
In rare cases, a suture commissuroplasty may correct the problem. Sometimes Dr. del Nido will use the DeVega suture annuloplasty – “even though it is very much user dependent; it’s very easy in pediatrics to create stenosis with the DeVega.” As an alternative, synthetic ring annuloplasties can confine valve growth and are rarely used.
Dr. del Nido’s preference is to use a hybrid approach of tissue and resorbable material. “The advantage of the resorbable material is that it will go away, but that’s also the problem with the resorbable material,” he said. “Once it does go away, there’s nothing there to support the annulus, so a combination of tissue and resorbable suture is probably the best answer.”
In posterior leaflet deficiency, a patch of pericardium posteriorly can augment the dysfunctional leaflet. You can also use pericardium as an annuloplasty ring. “You can use it circumferentially,” Dr. del Nido said. “It’s a soft ring; you can certainly use this material which is autologous; it does provide strength to the fibrous annulus; it does support that valve; and you do see growth.” He added that bovine pericardium is not ideal for this use.
Dr. del Nido reported no relevant financial relationships.
NEW YORK – Repairing mitral valves in pediatric patients must overcome two issues: the wide variability in their anatomy and their growth. Using strategies and techniques common in adult mitral surgery can accomplish good mitral valve function in children, but some techniques in children differ, like using combined resorbable material with autologous tissue or transferring native chords instead of placing artificial chords to a malfunctioning leaflet.
Pedro del Nido, MD, of Boston Children’s Hospital, said the spectrum of mitral valve pathology in children goes from congenital mitral stenosis with a thick annulus with leaflet immobility to leaflet hypermobility that involves anterior leaflet prolapse and can involve a cleft that causes regurgitation. Dr. del Nido explained his surgical approaches for mitral valve disease in children at the 2017 Mitral Conclave, sponsored by the American Association of Thoracic Surgery.
Accessing the mitral valve in children requires a different approach than in adults, Dr. del Nido said. “Going through the left atrium is generally difficult, so we often enter through a trans-septal incision,” he said. “The main reason for that is because the tricuspid valve is often associated with the mitral valve problem and this gives us the most direct exposure.”
Once the surgeon gains exposure, the surgical analysis for a diseased adult or child valve is almost identical, with the exception that adult disease is acquired whereas childhood disease tends to be congenital, Dr. del Nido said. “In the congenital patient, we often find fibroelastic tissue that the child is born with,” he said. “We see this in neonates and young infants. It thickens over time; it doesn’t often calcify, but it does often restrict the leaflets and it tends to fuse the chords, so in essence you have direct attachments of the leaflets to the papillaries.”
He explained that this pathology requires an approach similar to that for rheumatic mitral disease in adults. “Start splitting the commissures and start resecting the tissue off the chords creating fenestrations in order to improve the inflow.” Dr. del Nido added, “If you don’t do this, the child will always have a gradient, and if you think about an adult having problems and symptoms with a gradient, think about a 10-year-old running around trying to do athletics; it’s impossible.”
Dysfunctional chords also require a somewhat different approach in children than they require in adults. “We find elongation of the chords and the anterior support structure is abnormal; the secondary chords are totally intact,” Dr. del Nido said. When confronting a torn-edge chord, resection is often an option in adults, but is uncommon in children. “We don’t usually have very much leaflet tissue,” he said. Artificial chords do not accommodate growth.
“We tend to use native tissue,” said Dr. del Nido. “You can transfer the strut chord; you can transfer the secondary chord in order to achieve support for the edge of that prolapsed leaflet.”
Leaflet problems are probably the biggest single source of recurrence in children, Dr. del Nido said. A cleft on the anterior leaflet can be particularly vexing. For example, cleft edges attached to the septum can prevent the valve leaflet from coaptation with the posterior leaflet. “If you don’t recognize that on 3-D echocardiography, you’re going to have a problem; that leaflet will never create the coaptation surface that you want,” he said.
The solution may lie underneath the leaflet. Said Dr. del Nido, “We tend to want to close a cleft, and, yes, that will get you relief of regurgitation in the central portion, but if you end up with immobility of that leaflet, then look underneath. Most often there are very abnormal attachments to the edges of that cleft to the septum. You have to get rid of that; if you don’t resect all that, you’ll never have a leaflet that truly floats up to coapt against the posterior leaflet.”
Annular dilation in children can also challenge a cardiothoracic surgeon’s skill.
In rare cases, a suture commissuroplasty may correct the problem. Sometimes Dr. del Nido will use the DeVega suture annuloplasty – “even though it is very much user dependent; it’s very easy in pediatrics to create stenosis with the DeVega.” As an alternative, synthetic ring annuloplasties can confine valve growth and are rarely used.
Dr. del Nido’s preference is to use a hybrid approach of tissue and resorbable material. “The advantage of the resorbable material is that it will go away, but that’s also the problem with the resorbable material,” he said. “Once it does go away, there’s nothing there to support the annulus, so a combination of tissue and resorbable suture is probably the best answer.”
In posterior leaflet deficiency, a patch of pericardium posteriorly can augment the dysfunctional leaflet. You can also use pericardium as an annuloplasty ring. “You can use it circumferentially,” Dr. del Nido said. “It’s a soft ring; you can certainly use this material which is autologous; it does provide strength to the fibrous annulus; it does support that valve; and you do see growth.” He added that bovine pericardium is not ideal for this use.
Dr. del Nido reported no relevant financial relationships.
NEW YORK – Repairing mitral valves in pediatric patients must overcome two issues: the wide variability in their anatomy and their growth. Using strategies and techniques common in adult mitral surgery can accomplish good mitral valve function in children, but some techniques in children differ, like using combined resorbable material with autologous tissue or transferring native chords instead of placing artificial chords to a malfunctioning leaflet.
Pedro del Nido, MD, of Boston Children’s Hospital, said the spectrum of mitral valve pathology in children goes from congenital mitral stenosis with a thick annulus with leaflet immobility to leaflet hypermobility that involves anterior leaflet prolapse and can involve a cleft that causes regurgitation. Dr. del Nido explained his surgical approaches for mitral valve disease in children at the 2017 Mitral Conclave, sponsored by the American Association of Thoracic Surgery.
Accessing the mitral valve in children requires a different approach than in adults, Dr. del Nido said. “Going through the left atrium is generally difficult, so we often enter through a trans-septal incision,” he said. “The main reason for that is because the tricuspid valve is often associated with the mitral valve problem and this gives us the most direct exposure.”
Once the surgeon gains exposure, the surgical analysis for a diseased adult or child valve is almost identical, with the exception that adult disease is acquired whereas childhood disease tends to be congenital, Dr. del Nido said. “In the congenital patient, we often find fibroelastic tissue that the child is born with,” he said. “We see this in neonates and young infants. It thickens over time; it doesn’t often calcify, but it does often restrict the leaflets and it tends to fuse the chords, so in essence you have direct attachments of the leaflets to the papillaries.”
He explained that this pathology requires an approach similar to that for rheumatic mitral disease in adults. “Start splitting the commissures and start resecting the tissue off the chords creating fenestrations in order to improve the inflow.” Dr. del Nido added, “If you don’t do this, the child will always have a gradient, and if you think about an adult having problems and symptoms with a gradient, think about a 10-year-old running around trying to do athletics; it’s impossible.”
Dysfunctional chords also require a somewhat different approach in children than they require in adults. “We find elongation of the chords and the anterior support structure is abnormal; the secondary chords are totally intact,” Dr. del Nido said. When confronting a torn-edge chord, resection is often an option in adults, but is uncommon in children. “We don’t usually have very much leaflet tissue,” he said. Artificial chords do not accommodate growth.
“We tend to use native tissue,” said Dr. del Nido. “You can transfer the strut chord; you can transfer the secondary chord in order to achieve support for the edge of that prolapsed leaflet.”
Leaflet problems are probably the biggest single source of recurrence in children, Dr. del Nido said. A cleft on the anterior leaflet can be particularly vexing. For example, cleft edges attached to the septum can prevent the valve leaflet from coaptation with the posterior leaflet. “If you don’t recognize that on 3-D echocardiography, you’re going to have a problem; that leaflet will never create the coaptation surface that you want,” he said.
The solution may lie underneath the leaflet. Said Dr. del Nido, “We tend to want to close a cleft, and, yes, that will get you relief of regurgitation in the central portion, but if you end up with immobility of that leaflet, then look underneath. Most often there are very abnormal attachments to the edges of that cleft to the septum. You have to get rid of that; if you don’t resect all that, you’ll never have a leaflet that truly floats up to coapt against the posterior leaflet.”
Annular dilation in children can also challenge a cardiothoracic surgeon’s skill.
In rare cases, a suture commissuroplasty may correct the problem. Sometimes Dr. del Nido will use the DeVega suture annuloplasty – “even though it is very much user dependent; it’s very easy in pediatrics to create stenosis with the DeVega.” As an alternative, synthetic ring annuloplasties can confine valve growth and are rarely used.
Dr. del Nido’s preference is to use a hybrid approach of tissue and resorbable material. “The advantage of the resorbable material is that it will go away, but that’s also the problem with the resorbable material,” he said. “Once it does go away, there’s nothing there to support the annulus, so a combination of tissue and resorbable suture is probably the best answer.”
In posterior leaflet deficiency, a patch of pericardium posteriorly can augment the dysfunctional leaflet. You can also use pericardium as an annuloplasty ring. “You can use it circumferentially,” Dr. del Nido said. “It’s a soft ring; you can certainly use this material which is autologous; it does provide strength to the fibrous annulus; it does support that valve; and you do see growth.” He added that bovine pericardium is not ideal for this use.
Dr. del Nido reported no relevant financial relationships.
AT THE 2017 MITRAL VALVE CONCLAVE
Key clinical point: Operating on mitral valves in pediatric patients must overcome the wide variability in anatomy among young patients and accommodate growth.
Major finding: Strategies that involve a combination of resorbable material with autologous tissue can accomplish repair in most of these patients.
Data source: Review based on Dr. del Nido’s experience.
Disclosures: Dr. del Nido reported having no relevant financial disclosures.
Age, anticoagulation prime issues in choice of mechanical valves
NEW YORK – While bioprosthetic valves have become the predominant choice for cardiothoracic surgeons performing heart valve replacement, situations exist in which a mechanical valve may be a better choice. Young and middle-aged adults are the ideal candidates for mechanical valves, but achieving long-term success with mechanical valves also depends on a patient’s circumstances, according to an expert panel at the American Association for Thoracic Surgery Mitral Conclave 2017 here.
“I think we should put in more mechanical valves,” said panel chair Thoralf M. Sundt III, MD, of Massachusetts General Hospital, Boston and former AATS president. “I think mechanical valves have gotten a bad rap. If patients have a supportive, stable social structure and they can manage their anticoagulation, I don’t think there’s anything wrong with a mechanical valve. I think the pendulum has swung too far.”
Anelechi C. Anyanwu, MD, of Mount Sinai Health System, New York, acknowledged another patient factor that would enter his calculus for recommending a mechanical mitral valve. “We would consider a mechanical valve in the patient who is compliant [and] well informed and understands well the requirements and implications of long-term anticoagulation,” he said. In another scenario – “the patient who’s had multiple reoperations – we may consider a mechanical valve.” Particularly, the patient who has had a reoperation for a bioprosthetic valve resulting from early degeneration will merit consideration of a mechanical prosthesis, Dr. Anyanwu said.
Michael A. Borger, MD, of Columbia University Medical Center, New York, agreed that the younger patient who has had a series of operations is a good candidate for a mechanical mitral valve. “In addition, the mechanical valve does have some hemodynamic advantages over bioprosthetic valves,” Dr. Borger said. “If a surgeon implants a 25-mm tissue valve with a plan for the patient to undergo a series of valve-in-valve operations in the future, mitral stenosis will definitely become a factor at some point.”
Pedro J. del Nido, MD, a pediatric cardiac surgeon at Children’s Hospital, Boston, expanded on that point. “We very, very rarely use mechanical valves in young patients,” Dr. del Nido said. “In very young patients, the reoperation rates for mechanical or biological valves are not much different. We still have to reoperate on both sets of patients. But, the reoperation itself for a mechanical valve is more difficult, and there is the need for full anticoagulation.”
Instead, Dr. del Nido has used the bovine Melody valve (Medtronic) in the mitral position for these patients because it accommodates some growth. Typically, the only time Dr. del Nido considers a mechanical valve in these young patients is for an aortic valve replacement.
Another younger patient that may be a good candidate for a mechanical valve is the 25-year-old male with rheumatic mitral stenosis. “I would err on the side of the mechanical valve in this patient if I were to make a choice, but I would present the patient with informed data on the outcomes of both mechanical valve and bioprosthesis,” according to Dr. Anyanwu
For even younger patients, Dr. del Nido bases his valve choice on their activity level. “I have a lot of young teenagers, and my decision is entirely based on what their background is like – what their regular life is like,” he said. “If they have a support structure than can help them manage anticoagulation, absolutely the mechanical valve is probably the best thing.”
However, there are exceptions because the couching of the device can change over time. “Eventually that 12-year-old [or] that 15-year-old is going to decide he can still snowboard or ride a motorcycle, and that’s when he’s going to get into trouble,” Dr. del Nido said. “If a reoperation is not problematic, I would still say it’s a tossup between the mechanical and biological valve. I would still offer the possibility of a bioprosthesis knowing that they’ll be back in 6, 8, or 10 years.”
Bleeding risk is another factor that can influence valve choice, as mechanical valve recipients must stay on anticoagulation. “The bleeding complication rates are very low when patients are younger, in their 40s or 50s, but the bleeding rates increase exponentially with warfarin for patients in their 80s and 90s,” Dr. Borger said. “The older you are, the more difficult it is to manage anticoagulation. In addition, the ability to stop anticoagulants because of bleeding is different for the two types of prostheses. If a patient develops bleeding during anticoagulation for leaflet immobility after a tissue valve-in-valve procedure, the physician can simply stop the warfarin. But, if you have a mechanical mitral valve in place that’s not an option.”
That’s not necessarily a bad problem to have, Dr. Sundt said, quoting Steven Bolling, MD, of the University of Michigan. “If you’re 25 and you’ve had your valve replaced and you’re worried about bleeding at the age of 80, I call that a success.”
Dr. Borger disclosed he is a speaker for and consultant to Edwards Lifesciences, Medtronic, and CryoLife; a speaker for St. Jude; and a recipient of research support from NeoChord. Dr. Lange disclosed he is a consultant and speaker for Medtronic, St. Jude/Abbott, LivaNova and NeoChord and cofounder of HighLife. Dr. Anyanwu, Dr. del Nido, and Dr. Sundt reported no relevant financial relationships.
NEW YORK – While bioprosthetic valves have become the predominant choice for cardiothoracic surgeons performing heart valve replacement, situations exist in which a mechanical valve may be a better choice. Young and middle-aged adults are the ideal candidates for mechanical valves, but achieving long-term success with mechanical valves also depends on a patient’s circumstances, according to an expert panel at the American Association for Thoracic Surgery Mitral Conclave 2017 here.
“I think we should put in more mechanical valves,” said panel chair Thoralf M. Sundt III, MD, of Massachusetts General Hospital, Boston and former AATS president. “I think mechanical valves have gotten a bad rap. If patients have a supportive, stable social structure and they can manage their anticoagulation, I don’t think there’s anything wrong with a mechanical valve. I think the pendulum has swung too far.”
Anelechi C. Anyanwu, MD, of Mount Sinai Health System, New York, acknowledged another patient factor that would enter his calculus for recommending a mechanical mitral valve. “We would consider a mechanical valve in the patient who is compliant [and] well informed and understands well the requirements and implications of long-term anticoagulation,” he said. In another scenario – “the patient who’s had multiple reoperations – we may consider a mechanical valve.” Particularly, the patient who has had a reoperation for a bioprosthetic valve resulting from early degeneration will merit consideration of a mechanical prosthesis, Dr. Anyanwu said.
Michael A. Borger, MD, of Columbia University Medical Center, New York, agreed that the younger patient who has had a series of operations is a good candidate for a mechanical mitral valve. “In addition, the mechanical valve does have some hemodynamic advantages over bioprosthetic valves,” Dr. Borger said. “If a surgeon implants a 25-mm tissue valve with a plan for the patient to undergo a series of valve-in-valve operations in the future, mitral stenosis will definitely become a factor at some point.”
Pedro J. del Nido, MD, a pediatric cardiac surgeon at Children’s Hospital, Boston, expanded on that point. “We very, very rarely use mechanical valves in young patients,” Dr. del Nido said. “In very young patients, the reoperation rates for mechanical or biological valves are not much different. We still have to reoperate on both sets of patients. But, the reoperation itself for a mechanical valve is more difficult, and there is the need for full anticoagulation.”
Instead, Dr. del Nido has used the bovine Melody valve (Medtronic) in the mitral position for these patients because it accommodates some growth. Typically, the only time Dr. del Nido considers a mechanical valve in these young patients is for an aortic valve replacement.
Another younger patient that may be a good candidate for a mechanical valve is the 25-year-old male with rheumatic mitral stenosis. “I would err on the side of the mechanical valve in this patient if I were to make a choice, but I would present the patient with informed data on the outcomes of both mechanical valve and bioprosthesis,” according to Dr. Anyanwu
For even younger patients, Dr. del Nido bases his valve choice on their activity level. “I have a lot of young teenagers, and my decision is entirely based on what their background is like – what their regular life is like,” he said. “If they have a support structure than can help them manage anticoagulation, absolutely the mechanical valve is probably the best thing.”
However, there are exceptions because the couching of the device can change over time. “Eventually that 12-year-old [or] that 15-year-old is going to decide he can still snowboard or ride a motorcycle, and that’s when he’s going to get into trouble,” Dr. del Nido said. “If a reoperation is not problematic, I would still say it’s a tossup between the mechanical and biological valve. I would still offer the possibility of a bioprosthesis knowing that they’ll be back in 6, 8, or 10 years.”
Bleeding risk is another factor that can influence valve choice, as mechanical valve recipients must stay on anticoagulation. “The bleeding complication rates are very low when patients are younger, in their 40s or 50s, but the bleeding rates increase exponentially with warfarin for patients in their 80s and 90s,” Dr. Borger said. “The older you are, the more difficult it is to manage anticoagulation. In addition, the ability to stop anticoagulants because of bleeding is different for the two types of prostheses. If a patient develops bleeding during anticoagulation for leaflet immobility after a tissue valve-in-valve procedure, the physician can simply stop the warfarin. But, if you have a mechanical mitral valve in place that’s not an option.”
That’s not necessarily a bad problem to have, Dr. Sundt said, quoting Steven Bolling, MD, of the University of Michigan. “If you’re 25 and you’ve had your valve replaced and you’re worried about bleeding at the age of 80, I call that a success.”
Dr. Borger disclosed he is a speaker for and consultant to Edwards Lifesciences, Medtronic, and CryoLife; a speaker for St. Jude; and a recipient of research support from NeoChord. Dr. Lange disclosed he is a consultant and speaker for Medtronic, St. Jude/Abbott, LivaNova and NeoChord and cofounder of HighLife. Dr. Anyanwu, Dr. del Nido, and Dr. Sundt reported no relevant financial relationships.
NEW YORK – While bioprosthetic valves have become the predominant choice for cardiothoracic surgeons performing heart valve replacement, situations exist in which a mechanical valve may be a better choice. Young and middle-aged adults are the ideal candidates for mechanical valves, but achieving long-term success with mechanical valves also depends on a patient’s circumstances, according to an expert panel at the American Association for Thoracic Surgery Mitral Conclave 2017 here.
“I think we should put in more mechanical valves,” said panel chair Thoralf M. Sundt III, MD, of Massachusetts General Hospital, Boston and former AATS president. “I think mechanical valves have gotten a bad rap. If patients have a supportive, stable social structure and they can manage their anticoagulation, I don’t think there’s anything wrong with a mechanical valve. I think the pendulum has swung too far.”
Anelechi C. Anyanwu, MD, of Mount Sinai Health System, New York, acknowledged another patient factor that would enter his calculus for recommending a mechanical mitral valve. “We would consider a mechanical valve in the patient who is compliant [and] well informed and understands well the requirements and implications of long-term anticoagulation,” he said. In another scenario – “the patient who’s had multiple reoperations – we may consider a mechanical valve.” Particularly, the patient who has had a reoperation for a bioprosthetic valve resulting from early degeneration will merit consideration of a mechanical prosthesis, Dr. Anyanwu said.
Michael A. Borger, MD, of Columbia University Medical Center, New York, agreed that the younger patient who has had a series of operations is a good candidate for a mechanical mitral valve. “In addition, the mechanical valve does have some hemodynamic advantages over bioprosthetic valves,” Dr. Borger said. “If a surgeon implants a 25-mm tissue valve with a plan for the patient to undergo a series of valve-in-valve operations in the future, mitral stenosis will definitely become a factor at some point.”
Pedro J. del Nido, MD, a pediatric cardiac surgeon at Children’s Hospital, Boston, expanded on that point. “We very, very rarely use mechanical valves in young patients,” Dr. del Nido said. “In very young patients, the reoperation rates for mechanical or biological valves are not much different. We still have to reoperate on both sets of patients. But, the reoperation itself for a mechanical valve is more difficult, and there is the need for full anticoagulation.”
Instead, Dr. del Nido has used the bovine Melody valve (Medtronic) in the mitral position for these patients because it accommodates some growth. Typically, the only time Dr. del Nido considers a mechanical valve in these young patients is for an aortic valve replacement.
Another younger patient that may be a good candidate for a mechanical valve is the 25-year-old male with rheumatic mitral stenosis. “I would err on the side of the mechanical valve in this patient if I were to make a choice, but I would present the patient with informed data on the outcomes of both mechanical valve and bioprosthesis,” according to Dr. Anyanwu
For even younger patients, Dr. del Nido bases his valve choice on their activity level. “I have a lot of young teenagers, and my decision is entirely based on what their background is like – what their regular life is like,” he said. “If they have a support structure than can help them manage anticoagulation, absolutely the mechanical valve is probably the best thing.”
However, there are exceptions because the couching of the device can change over time. “Eventually that 12-year-old [or] that 15-year-old is going to decide he can still snowboard or ride a motorcycle, and that’s when he’s going to get into trouble,” Dr. del Nido said. “If a reoperation is not problematic, I would still say it’s a tossup between the mechanical and biological valve. I would still offer the possibility of a bioprosthesis knowing that they’ll be back in 6, 8, or 10 years.”
Bleeding risk is another factor that can influence valve choice, as mechanical valve recipients must stay on anticoagulation. “The bleeding complication rates are very low when patients are younger, in their 40s or 50s, but the bleeding rates increase exponentially with warfarin for patients in their 80s and 90s,” Dr. Borger said. “The older you are, the more difficult it is to manage anticoagulation. In addition, the ability to stop anticoagulants because of bleeding is different for the two types of prostheses. If a patient develops bleeding during anticoagulation for leaflet immobility after a tissue valve-in-valve procedure, the physician can simply stop the warfarin. But, if you have a mechanical mitral valve in place that’s not an option.”
That’s not necessarily a bad problem to have, Dr. Sundt said, quoting Steven Bolling, MD, of the University of Michigan. “If you’re 25 and you’ve had your valve replaced and you’re worried about bleeding at the age of 80, I call that a success.”
Dr. Borger disclosed he is a speaker for and consultant to Edwards Lifesciences, Medtronic, and CryoLife; a speaker for St. Jude; and a recipient of research support from NeoChord. Dr. Lange disclosed he is a consultant and speaker for Medtronic, St. Jude/Abbott, LivaNova and NeoChord and cofounder of HighLife. Dr. Anyanwu, Dr. del Nido, and Dr. Sundt reported no relevant financial relationships.
EXPERT ANALYSIS FROM THE 2017 MITRAL VALVE CONCLAVE
Shift to minimally invasive MV surgery picks up
NEW YORK – An analysis of a Society of Thoracic Surgeons database has identified a significant increase in volumes for isolated mitral valve surgery and leaflet prolapse this decade, with a shift toward minimally invasive approaches, according to a study of trends in mitral valve surgery in the United States presented here at the American Association for Thoracic Surgery Mitral Conclave 2017.
James Gammie, MD, of the University of Maryland School of Medicine, Baltimore, reported on the analysis of the STS Adult Cardiac Surgery Database in which more than 90% of the adult cardiac surgery centers in North America participate.
“Degenerative disease remains the most common reason patients are referred for surgery,” Dr. Gammie said, noting that 60.7% of patients with an identified etiology had degenerative leaflet prolapse (etiology was unknown in 31% of the patients in the dataset).
“The operative approach has changed and continues to shift toward a less invasive approach,” Dr. Gammie said. Overall, 74.1% of operations involved sternotomy, but only 67.5% of those in the leaflet prolapse subgroup, with less invasive operations comprising 23% of all operations and 29.1% of those in the leaflet prolapse subgroup. From 2011 to 2016, total mitral surgical volume grew at a rate of 1.1% annually, but the volume for isolated MV operations grew 4.4% annually while leaflet prolapse procedures increased 7.6% annually, Dr. Gammie said.
Dr. Gammie described surgeons’ decision to perform ablation for preoperative AF during MV surgery a “coin toss.” One-third (34%) had AF, but only 51.2% of patients with AF in the total cohort and 54.4% of those in the leaflet prolapse subgroup got ablation. The overall MV repair rate was 65% for the total cohort but 83% for those with leaflet prolapse. For those who had MV replacement, the share of bioprosthetic devices increased steadily through the study period, from around 65% to 75.8%, Dr. Gammie said.
In the leaflet prolapse subgroup, 96.1% had annuloplasty and 29.2% had artificial chords implanted, with an average of two chords per operation. “There’s an increasing use of artificial ePTFE chords,” Dr. Gammie said. He noted the leaflet prolapse subgroup was composed of low-risk healthy patients. The mean ejection fraction (EF) for the cohort was 57%, and 47% of patients had EF of less than 60%. The overwhelming majority of patients (88%) had Class I indications for surgery with the remainder having Class IIa indications.
Dr. Gammie noted a few other emerging trends of MV surgery during the study period. “Patients with functional mitral regurgitation are rarely referred for operation: these patients made up fewer than 5% of patients undergoing mitral valve operations during the study period,” he said.;
With regard to outcomes, Dr. Gammie said, “There remain substantial differences between repair and replacement.” Replacement had almost twice the rate of reoperation for bleeding than repair (4.1% vs. 2.1%) and renal failure (3.4% vs. 1.4%).
“We observed that a substantial number of patients have an unsuccessful attempt at mitral valve repair before undergoing replacement – 16 % of the overall replacement group and 27% of patients having replacement for degenerative leaflet prolapse,” he said. “This does not appear to penalize patients in terms of outcome.”
The rate of permanent pacemaker was also significantly higher in the replacement cohort, 9.8% vs. 3.8% for repair operations, as was operative mortality, 3.7% vs. 1.1%. Said Dr. Gammie.
“This is something to think about as we move to less invasive approaches and overall operative mortality remains over threefold higher for replacement than repair.”
The leaflet prolapse subgroup showed similar disparities between replacement and repair groups. “The increased application of repair when feasible will be of value to improve outcomes, as will referral of patients earlier in the disease process ,” Dr. Gammie said.
“In our own STS database, about one-third of patients who were coded as having AF had no evidence of it, and that’s why in our institution they don’t get treated.” He added, “I’m not that surprised at the low repair rate when the average surgeon in the United States does five mitral repairs a year.”
Dr. Gammie disclosed that he is a consultant to Edwards Lifesciences and has an ownership interest in Harpoon Medical. Dr. Damiano disclosed that he is a speaker for LivaNova and a consultant to and a research grant recipient of Atricure.
NEW YORK – An analysis of a Society of Thoracic Surgeons database has identified a significant increase in volumes for isolated mitral valve surgery and leaflet prolapse this decade, with a shift toward minimally invasive approaches, according to a study of trends in mitral valve surgery in the United States presented here at the American Association for Thoracic Surgery Mitral Conclave 2017.
James Gammie, MD, of the University of Maryland School of Medicine, Baltimore, reported on the analysis of the STS Adult Cardiac Surgery Database in which more than 90% of the adult cardiac surgery centers in North America participate.
“Degenerative disease remains the most common reason patients are referred for surgery,” Dr. Gammie said, noting that 60.7% of patients with an identified etiology had degenerative leaflet prolapse (etiology was unknown in 31% of the patients in the dataset).
“The operative approach has changed and continues to shift toward a less invasive approach,” Dr. Gammie said. Overall, 74.1% of operations involved sternotomy, but only 67.5% of those in the leaflet prolapse subgroup, with less invasive operations comprising 23% of all operations and 29.1% of those in the leaflet prolapse subgroup. From 2011 to 2016, total mitral surgical volume grew at a rate of 1.1% annually, but the volume for isolated MV operations grew 4.4% annually while leaflet prolapse procedures increased 7.6% annually, Dr. Gammie said.
Dr. Gammie described surgeons’ decision to perform ablation for preoperative AF during MV surgery a “coin toss.” One-third (34%) had AF, but only 51.2% of patients with AF in the total cohort and 54.4% of those in the leaflet prolapse subgroup got ablation. The overall MV repair rate was 65% for the total cohort but 83% for those with leaflet prolapse. For those who had MV replacement, the share of bioprosthetic devices increased steadily through the study period, from around 65% to 75.8%, Dr. Gammie said.
In the leaflet prolapse subgroup, 96.1% had annuloplasty and 29.2% had artificial chords implanted, with an average of two chords per operation. “There’s an increasing use of artificial ePTFE chords,” Dr. Gammie said. He noted the leaflet prolapse subgroup was composed of low-risk healthy patients. The mean ejection fraction (EF) for the cohort was 57%, and 47% of patients had EF of less than 60%. The overwhelming majority of patients (88%) had Class I indications for surgery with the remainder having Class IIa indications.
Dr. Gammie noted a few other emerging trends of MV surgery during the study period. “Patients with functional mitral regurgitation are rarely referred for operation: these patients made up fewer than 5% of patients undergoing mitral valve operations during the study period,” he said.;
With regard to outcomes, Dr. Gammie said, “There remain substantial differences between repair and replacement.” Replacement had almost twice the rate of reoperation for bleeding than repair (4.1% vs. 2.1%) and renal failure (3.4% vs. 1.4%).
“We observed that a substantial number of patients have an unsuccessful attempt at mitral valve repair before undergoing replacement – 16 % of the overall replacement group and 27% of patients having replacement for degenerative leaflet prolapse,” he said. “This does not appear to penalize patients in terms of outcome.”
The rate of permanent pacemaker was also significantly higher in the replacement cohort, 9.8% vs. 3.8% for repair operations, as was operative mortality, 3.7% vs. 1.1%. Said Dr. Gammie.
“This is something to think about as we move to less invasive approaches and overall operative mortality remains over threefold higher for replacement than repair.”
The leaflet prolapse subgroup showed similar disparities between replacement and repair groups. “The increased application of repair when feasible will be of value to improve outcomes, as will referral of patients earlier in the disease process ,” Dr. Gammie said.
“In our own STS database, about one-third of patients who were coded as having AF had no evidence of it, and that’s why in our institution they don’t get treated.” He added, “I’m not that surprised at the low repair rate when the average surgeon in the United States does five mitral repairs a year.”
Dr. Gammie disclosed that he is a consultant to Edwards Lifesciences and has an ownership interest in Harpoon Medical. Dr. Damiano disclosed that he is a speaker for LivaNova and a consultant to and a research grant recipient of Atricure.
NEW YORK – An analysis of a Society of Thoracic Surgeons database has identified a significant increase in volumes for isolated mitral valve surgery and leaflet prolapse this decade, with a shift toward minimally invasive approaches, according to a study of trends in mitral valve surgery in the United States presented here at the American Association for Thoracic Surgery Mitral Conclave 2017.
James Gammie, MD, of the University of Maryland School of Medicine, Baltimore, reported on the analysis of the STS Adult Cardiac Surgery Database in which more than 90% of the adult cardiac surgery centers in North America participate.
“Degenerative disease remains the most common reason patients are referred for surgery,” Dr. Gammie said, noting that 60.7% of patients with an identified etiology had degenerative leaflet prolapse (etiology was unknown in 31% of the patients in the dataset).
“The operative approach has changed and continues to shift toward a less invasive approach,” Dr. Gammie said. Overall, 74.1% of operations involved sternotomy, but only 67.5% of those in the leaflet prolapse subgroup, with less invasive operations comprising 23% of all operations and 29.1% of those in the leaflet prolapse subgroup. From 2011 to 2016, total mitral surgical volume grew at a rate of 1.1% annually, but the volume for isolated MV operations grew 4.4% annually while leaflet prolapse procedures increased 7.6% annually, Dr. Gammie said.
Dr. Gammie described surgeons’ decision to perform ablation for preoperative AF during MV surgery a “coin toss.” One-third (34%) had AF, but only 51.2% of patients with AF in the total cohort and 54.4% of those in the leaflet prolapse subgroup got ablation. The overall MV repair rate was 65% for the total cohort but 83% for those with leaflet prolapse. For those who had MV replacement, the share of bioprosthetic devices increased steadily through the study period, from around 65% to 75.8%, Dr. Gammie said.
In the leaflet prolapse subgroup, 96.1% had annuloplasty and 29.2% had artificial chords implanted, with an average of two chords per operation. “There’s an increasing use of artificial ePTFE chords,” Dr. Gammie said. He noted the leaflet prolapse subgroup was composed of low-risk healthy patients. The mean ejection fraction (EF) for the cohort was 57%, and 47% of patients had EF of less than 60%. The overwhelming majority of patients (88%) had Class I indications for surgery with the remainder having Class IIa indications.
Dr. Gammie noted a few other emerging trends of MV surgery during the study period. “Patients with functional mitral regurgitation are rarely referred for operation: these patients made up fewer than 5% of patients undergoing mitral valve operations during the study period,” he said.;
With regard to outcomes, Dr. Gammie said, “There remain substantial differences between repair and replacement.” Replacement had almost twice the rate of reoperation for bleeding than repair (4.1% vs. 2.1%) and renal failure (3.4% vs. 1.4%).
“We observed that a substantial number of patients have an unsuccessful attempt at mitral valve repair before undergoing replacement – 16 % of the overall replacement group and 27% of patients having replacement for degenerative leaflet prolapse,” he said. “This does not appear to penalize patients in terms of outcome.”
The rate of permanent pacemaker was also significantly higher in the replacement cohort, 9.8% vs. 3.8% for repair operations, as was operative mortality, 3.7% vs. 1.1%. Said Dr. Gammie.
“This is something to think about as we move to less invasive approaches and overall operative mortality remains over threefold higher for replacement than repair.”
The leaflet prolapse subgroup showed similar disparities between replacement and repair groups. “The increased application of repair when feasible will be of value to improve outcomes, as will referral of patients earlier in the disease process ,” Dr. Gammie said.
“In our own STS database, about one-third of patients who were coded as having AF had no evidence of it, and that’s why in our institution they don’t get treated.” He added, “I’m not that surprised at the low repair rate when the average surgeon in the United States does five mitral repairs a year.”
Dr. Gammie disclosed that he is a consultant to Edwards Lifesciences and has an ownership interest in Harpoon Medical. Dr. Damiano disclosed that he is a speaker for LivaNova and a consultant to and a research grant recipient of Atricure.
AT THE AATS MITRAL CONCLAVE 2017
Key clinical point: The volume of mitral valve surgery has increased substantially, according to an analysis of the Society for Thoracic Surgery database, and an increasing percentage of procedures are minimally invasive in nature.
Major finding: Sternotomy continues to be the most widely used approach for mitral valve surgery, but less invasive options most recently comprised 23% of the overall group and 29.1% of those with isolated leaflet prolapse.
Data source: Retrospective study of 15,360 isolated mitral valve operations performed from July 2011 to September 2016 in the Society of Thoracic Surgeons database.
Disclosures: Dr. Gammie reported being a consultant to Edwards Lifesciences and having an ownership interest in Harpoon Medical.
In 8 years, TMVR means more procedures
NEW YORK – Since the commercialization of transcatheter mitral valve repair, the share of these procedures among all mitral operations has grown exponentially and has also contributed to an increase in the number of overall mitral procedures, including surgical repair, according to an analysis of a national German database reported at the American Association for Thoracic Surgery Mitral Conclave here.
Transcatheter mitral valve repair (TMVR) using the MitraClip device (Abbott Vascular) was first commercialized in Germany in 2008, and in the years since the share of TMVR procedures among all mitral operations increased from 0.3% to 18.1% in 2015 throughout Germany, said Lenard Conradi, MD, surgical director of minimally-invasive and transcatheter heart valve procedures at the University Heart Center Hamburg.
The goal of the study was to gain insights into how cardiothoracic surgeons in Germany and at Dr. Conradi’s center in particular were approaching TMVR and what types of patients were having the procedure, Dr. Conradi said.
“While the EuroSCORE I of patients we operated on didn’t change at all between these two time frames, there were subtle changes in the patients that we operated on,” he said. “Before the commercialization of TMVR, we tended to have a ratio of organic vs. functional MR [mitral regurgitation] of 50-50; after commercialization of TMVR, many of the functional MR patients were allocated to TMVR.”
Dr. Conradi noted the profile of patients who had mitral valve repair also changed once the transcatheter approach became available. “Ischemic disease with coronary artery disease, previous infarction, or previous cardiac surgery – mostly coronary artery bypass grafting – were much less prevalent in this surgery population after TMVR became available,” he said.
The study also found that 30-day mortality declined from 7% to 4% during the study period. “That was probably due to more adequate patient selection because we had a more appropriate treatment that we could offer these high-risk patients as an alternative to high-risk surgical approaches,” Dr. Conradi said.
The analysis stratified procedure volumes and growth by four age groups: younger than 65 years; 65-74; 75-84; and greater than ore equal to 85. Older patients were more likely to have TMVR. Surgical procedure volumes increased most in the less than 65 group and least in the greater than or equal to 85 group.
In Germany, transcatheter mitral valve procedures are reimbursed at a higher rate than surgical procedures, but that doesn’t fully explain the uptake in TMVR, Dr. Conradi said. “The patients receiving the transcatheter approach vs. surgery still differ fundamentally, but the addition of an interventional program decreases the surgical patient’s mean risk profile and thus optimizes surgical results,” he said. “I think this can only happen if surgeons are closely involved. The indications will broaden for these therapies. There’s no doubt about that.”
Dr. Conradi disclosed receiving travel support and lecture fees from Abbott Vascular.
NEW YORK – Since the commercialization of transcatheter mitral valve repair, the share of these procedures among all mitral operations has grown exponentially and has also contributed to an increase in the number of overall mitral procedures, including surgical repair, according to an analysis of a national German database reported at the American Association for Thoracic Surgery Mitral Conclave here.
Transcatheter mitral valve repair (TMVR) using the MitraClip device (Abbott Vascular) was first commercialized in Germany in 2008, and in the years since the share of TMVR procedures among all mitral operations increased from 0.3% to 18.1% in 2015 throughout Germany, said Lenard Conradi, MD, surgical director of minimally-invasive and transcatheter heart valve procedures at the University Heart Center Hamburg.
The goal of the study was to gain insights into how cardiothoracic surgeons in Germany and at Dr. Conradi’s center in particular were approaching TMVR and what types of patients were having the procedure, Dr. Conradi said.
“While the EuroSCORE I of patients we operated on didn’t change at all between these two time frames, there were subtle changes in the patients that we operated on,” he said. “Before the commercialization of TMVR, we tended to have a ratio of organic vs. functional MR [mitral regurgitation] of 50-50; after commercialization of TMVR, many of the functional MR patients were allocated to TMVR.”
Dr. Conradi noted the profile of patients who had mitral valve repair also changed once the transcatheter approach became available. “Ischemic disease with coronary artery disease, previous infarction, or previous cardiac surgery – mostly coronary artery bypass grafting – were much less prevalent in this surgery population after TMVR became available,” he said.
The study also found that 30-day mortality declined from 7% to 4% during the study period. “That was probably due to more adequate patient selection because we had a more appropriate treatment that we could offer these high-risk patients as an alternative to high-risk surgical approaches,” Dr. Conradi said.
The analysis stratified procedure volumes and growth by four age groups: younger than 65 years; 65-74; 75-84; and greater than ore equal to 85. Older patients were more likely to have TMVR. Surgical procedure volumes increased most in the less than 65 group and least in the greater than or equal to 85 group.
In Germany, transcatheter mitral valve procedures are reimbursed at a higher rate than surgical procedures, but that doesn’t fully explain the uptake in TMVR, Dr. Conradi said. “The patients receiving the transcatheter approach vs. surgery still differ fundamentally, but the addition of an interventional program decreases the surgical patient’s mean risk profile and thus optimizes surgical results,” he said. “I think this can only happen if surgeons are closely involved. The indications will broaden for these therapies. There’s no doubt about that.”
Dr. Conradi disclosed receiving travel support and lecture fees from Abbott Vascular.
NEW YORK – Since the commercialization of transcatheter mitral valve repair, the share of these procedures among all mitral operations has grown exponentially and has also contributed to an increase in the number of overall mitral procedures, including surgical repair, according to an analysis of a national German database reported at the American Association for Thoracic Surgery Mitral Conclave here.
Transcatheter mitral valve repair (TMVR) using the MitraClip device (Abbott Vascular) was first commercialized in Germany in 2008, and in the years since the share of TMVR procedures among all mitral operations increased from 0.3% to 18.1% in 2015 throughout Germany, said Lenard Conradi, MD, surgical director of minimally-invasive and transcatheter heart valve procedures at the University Heart Center Hamburg.
The goal of the study was to gain insights into how cardiothoracic surgeons in Germany and at Dr. Conradi’s center in particular were approaching TMVR and what types of patients were having the procedure, Dr. Conradi said.
“While the EuroSCORE I of patients we operated on didn’t change at all between these two time frames, there were subtle changes in the patients that we operated on,” he said. “Before the commercialization of TMVR, we tended to have a ratio of organic vs. functional MR [mitral regurgitation] of 50-50; after commercialization of TMVR, many of the functional MR patients were allocated to TMVR.”
Dr. Conradi noted the profile of patients who had mitral valve repair also changed once the transcatheter approach became available. “Ischemic disease with coronary artery disease, previous infarction, or previous cardiac surgery – mostly coronary artery bypass grafting – were much less prevalent in this surgery population after TMVR became available,” he said.
The study also found that 30-day mortality declined from 7% to 4% during the study period. “That was probably due to more adequate patient selection because we had a more appropriate treatment that we could offer these high-risk patients as an alternative to high-risk surgical approaches,” Dr. Conradi said.
The analysis stratified procedure volumes and growth by four age groups: younger than 65 years; 65-74; 75-84; and greater than ore equal to 85. Older patients were more likely to have TMVR. Surgical procedure volumes increased most in the less than 65 group and least in the greater than or equal to 85 group.
In Germany, transcatheter mitral valve procedures are reimbursed at a higher rate than surgical procedures, but that doesn’t fully explain the uptake in TMVR, Dr. Conradi said. “The patients receiving the transcatheter approach vs. surgery still differ fundamentally, but the addition of an interventional program decreases the surgical patient’s mean risk profile and thus optimizes surgical results,” he said. “I think this can only happen if surgeons are closely involved. The indications will broaden for these therapies. There’s no doubt about that.”
Dr. Conradi disclosed receiving travel support and lecture fees from Abbott Vascular.
AT THE AATS MITRAL CONCLAVE 2017
Key clinical point: Since its commercialization, transcatheter mitral valve repair (TMVR) has accounted for an increasing share of all mitral surgeries in Germany and driven greater mitral surgery volume overall.
Major finding: Volume of surgical mitral valve procedures increased 70% overall and TMVR procedures 57% in Germany since 2008.
Data source: Analysis of data from German Federal statistics office.
Disclosures: Dr. Conradi reported receiving travel support and lecture fees from Abbott Vascular.
Gastric bands hit with high reoperation rates, rising costs
About one in five laparoscopic gastric band surgeries result in device-related reoperations and reoperations account for almost half of all Medicare expenditures for gastric band surgery, a large retrospective study has found.
The laparoscopic adjustable gastric band for treatment of morbid obesity, approved in 2001 by the Food and Drug Administration, was once a common choice for bariatric patients. Although its use has declined from in recent years, the American Society for Metabolic and Bariatric Surgery estimated that 11,000 bands were placed in 2015 and many others remain in place (ASMBS, Estimate of bariatric surgery numbers, 2011-2015, https://goo.gl/f8iByl). Many of these gastric bands will need to be removed, replaced, or revised in a series of procedures over the coming years.
Of the 24,042 gastric band patients in this study group, 4,636 (18.5%) underwent reoperation, defined as band removal, band replacement, or revision to a different bariatric procedure, but not including band size adjustment. Patients who had reoperations were more likely to be women, to be white, and to have slightly lower rates of hypertension and diabetes. But they were also more likely to have received a psychiatric, anemia, or electrolyte disorder diagnosis at the time of their index operations.
Among the 4,636 patients who had reoperations, 17,539 such procedures were performed, an average of 3.8 procedures per patient, in addition to the index operation, over an average follow-up of 4.5 years. The most common reoperation was for band removal (41.8%). Other reasons included conversion to laparoscopic Roux-en-Y gastric bypass (13.1%) or laparoscopic sleeve gastrectomy (5.3%).
The study also looked at the regional differences, reflecting the comparative success of some programs in managing laparoscopic gastric band placement. Reoperation rates across the referral hospitals ranged from 5% to 95.5%, The study found a nearly a threefold variation in reoperation rates across geographic regions. The bottom quartile of hospital referral regions had an average reoperation rate of 13.3% (0.3 standard deviation) and the top quartile had an average reoperation rate of 39.1% (0.21 SD). Top-quartile regions were concentrated in the West, but were otherwise distributed throughout the country.
Most reoperations were elective admissions (79.9%), while 10% were classified as urgent and another 10.1% as emergency. So although previous studies have documented complications such as band slippage and gastric erosion, the preponderance of elective admissions suggests patient and clinician preferences, or weight loss failure, rather than emergency situations, may be the driving force in the reoperation trend.
The investigators concluded that patients should be fully informed about the likelihood of reoperation with the gastric band. In addition, the wide range of reoperation rates across regions and institutions suggests that more training or better patient selection may be needed to improve outcomes. However, they suggested that “taken together, these findings indicate that the gastric band is associated with high reoperation rates and considerable costs to the payers, which raises concerns about its safety, effectiveness, and value.” They added that “payers should reconsider their coverage of the gastric band device.”
Coauthor Justin B. Dimick, MD, disclosed a financial interest in ArborMetrix. The other coauthors reported having no financial disclosures. The Robert Wood Johnson Foundation, U.S. Department of Veterans Affairs, National Institute on Aging, and National Institute of Diabetes and Digestive and Kidney Diseases provided funding.
Dr. Ibrahim and his colleagues have suggested that payers reconsider covering the adjustable laparoscopic gastric band. I disagree and feel that this device still has a role, albeit limited in the modern bariatric surgical program. Many patients do well for a long period. A committed surgeon and program, and the ideal patient with a similar level of commitment, are needed to achieve these best outcomes. Now that patients and surgeons are better informed of the drawbacks to the device, use has decreased without external regulations or policies to drive this change. No single bariatric procedure is appropriate for all patients. Patients need options, and we need better data to help guide their decisions. Do not throw the baby out with the bathwater.
Jon C. Gould, MD, FACS, is with the Medical College of Wisconsin, Milwaukee. Dr. Gould made these comments in an editorial (JAMA Surg. 2017 May 17; doi: 10.1001/jamasurg.2017.1082) that accompanied the study. He has no disclosures.
Dr. Ibrahim and his colleagues have suggested that payers reconsider covering the adjustable laparoscopic gastric band. I disagree and feel that this device still has a role, albeit limited in the modern bariatric surgical program. Many patients do well for a long period. A committed surgeon and program, and the ideal patient with a similar level of commitment, are needed to achieve these best outcomes. Now that patients and surgeons are better informed of the drawbacks to the device, use has decreased without external regulations or policies to drive this change. No single bariatric procedure is appropriate for all patients. Patients need options, and we need better data to help guide their decisions. Do not throw the baby out with the bathwater.
Jon C. Gould, MD, FACS, is with the Medical College of Wisconsin, Milwaukee. Dr. Gould made these comments in an editorial (JAMA Surg. 2017 May 17; doi: 10.1001/jamasurg.2017.1082) that accompanied the study. He has no disclosures.
Dr. Ibrahim and his colleagues have suggested that payers reconsider covering the adjustable laparoscopic gastric band. I disagree and feel that this device still has a role, albeit limited in the modern bariatric surgical program. Many patients do well for a long period. A committed surgeon and program, and the ideal patient with a similar level of commitment, are needed to achieve these best outcomes. Now that patients and surgeons are better informed of the drawbacks to the device, use has decreased without external regulations or policies to drive this change. No single bariatric procedure is appropriate for all patients. Patients need options, and we need better data to help guide their decisions. Do not throw the baby out with the bathwater.
Jon C. Gould, MD, FACS, is with the Medical College of Wisconsin, Milwaukee. Dr. Gould made these comments in an editorial (JAMA Surg. 2017 May 17; doi: 10.1001/jamasurg.2017.1082) that accompanied the study. He has no disclosures.
About one in five laparoscopic gastric band surgeries result in device-related reoperations and reoperations account for almost half of all Medicare expenditures for gastric band surgery, a large retrospective study has found.
The laparoscopic adjustable gastric band for treatment of morbid obesity, approved in 2001 by the Food and Drug Administration, was once a common choice for bariatric patients. Although its use has declined from in recent years, the American Society for Metabolic and Bariatric Surgery estimated that 11,000 bands were placed in 2015 and many others remain in place (ASMBS, Estimate of bariatric surgery numbers, 2011-2015, https://goo.gl/f8iByl). Many of these gastric bands will need to be removed, replaced, or revised in a series of procedures over the coming years.
Of the 24,042 gastric band patients in this study group, 4,636 (18.5%) underwent reoperation, defined as band removal, band replacement, or revision to a different bariatric procedure, but not including band size adjustment. Patients who had reoperations were more likely to be women, to be white, and to have slightly lower rates of hypertension and diabetes. But they were also more likely to have received a psychiatric, anemia, or electrolyte disorder diagnosis at the time of their index operations.
Among the 4,636 patients who had reoperations, 17,539 such procedures were performed, an average of 3.8 procedures per patient, in addition to the index operation, over an average follow-up of 4.5 years. The most common reoperation was for band removal (41.8%). Other reasons included conversion to laparoscopic Roux-en-Y gastric bypass (13.1%) or laparoscopic sleeve gastrectomy (5.3%).
The study also looked at the regional differences, reflecting the comparative success of some programs in managing laparoscopic gastric band placement. Reoperation rates across the referral hospitals ranged from 5% to 95.5%, The study found a nearly a threefold variation in reoperation rates across geographic regions. The bottom quartile of hospital referral regions had an average reoperation rate of 13.3% (0.3 standard deviation) and the top quartile had an average reoperation rate of 39.1% (0.21 SD). Top-quartile regions were concentrated in the West, but were otherwise distributed throughout the country.
Most reoperations were elective admissions (79.9%), while 10% were classified as urgent and another 10.1% as emergency. So although previous studies have documented complications such as band slippage and gastric erosion, the preponderance of elective admissions suggests patient and clinician preferences, or weight loss failure, rather than emergency situations, may be the driving force in the reoperation trend.
The investigators concluded that patients should be fully informed about the likelihood of reoperation with the gastric band. In addition, the wide range of reoperation rates across regions and institutions suggests that more training or better patient selection may be needed to improve outcomes. However, they suggested that “taken together, these findings indicate that the gastric band is associated with high reoperation rates and considerable costs to the payers, which raises concerns about its safety, effectiveness, and value.” They added that “payers should reconsider their coverage of the gastric band device.”
Coauthor Justin B. Dimick, MD, disclosed a financial interest in ArborMetrix. The other coauthors reported having no financial disclosures. The Robert Wood Johnson Foundation, U.S. Department of Veterans Affairs, National Institute on Aging, and National Institute of Diabetes and Digestive and Kidney Diseases provided funding.
About one in five laparoscopic gastric band surgeries result in device-related reoperations and reoperations account for almost half of all Medicare expenditures for gastric band surgery, a large retrospective study has found.
The laparoscopic adjustable gastric band for treatment of morbid obesity, approved in 2001 by the Food and Drug Administration, was once a common choice for bariatric patients. Although its use has declined from in recent years, the American Society for Metabolic and Bariatric Surgery estimated that 11,000 bands were placed in 2015 and many others remain in place (ASMBS, Estimate of bariatric surgery numbers, 2011-2015, https://goo.gl/f8iByl). Many of these gastric bands will need to be removed, replaced, or revised in a series of procedures over the coming years.
Of the 24,042 gastric band patients in this study group, 4,636 (18.5%) underwent reoperation, defined as band removal, band replacement, or revision to a different bariatric procedure, but not including band size adjustment. Patients who had reoperations were more likely to be women, to be white, and to have slightly lower rates of hypertension and diabetes. But they were also more likely to have received a psychiatric, anemia, or electrolyte disorder diagnosis at the time of their index operations.
Among the 4,636 patients who had reoperations, 17,539 such procedures were performed, an average of 3.8 procedures per patient, in addition to the index operation, over an average follow-up of 4.5 years. The most common reoperation was for band removal (41.8%). Other reasons included conversion to laparoscopic Roux-en-Y gastric bypass (13.1%) or laparoscopic sleeve gastrectomy (5.3%).
The study also looked at the regional differences, reflecting the comparative success of some programs in managing laparoscopic gastric band placement. Reoperation rates across the referral hospitals ranged from 5% to 95.5%, The study found a nearly a threefold variation in reoperation rates across geographic regions. The bottom quartile of hospital referral regions had an average reoperation rate of 13.3% (0.3 standard deviation) and the top quartile had an average reoperation rate of 39.1% (0.21 SD). Top-quartile regions were concentrated in the West, but were otherwise distributed throughout the country.
Most reoperations were elective admissions (79.9%), while 10% were classified as urgent and another 10.1% as emergency. So although previous studies have documented complications such as band slippage and gastric erosion, the preponderance of elective admissions suggests patient and clinician preferences, or weight loss failure, rather than emergency situations, may be the driving force in the reoperation trend.
The investigators concluded that patients should be fully informed about the likelihood of reoperation with the gastric band. In addition, the wide range of reoperation rates across regions and institutions suggests that more training or better patient selection may be needed to improve outcomes. However, they suggested that “taken together, these findings indicate that the gastric band is associated with high reoperation rates and considerable costs to the payers, which raises concerns about its safety, effectiveness, and value.” They added that “payers should reconsider their coverage of the gastric band device.”
Coauthor Justin B. Dimick, MD, disclosed a financial interest in ArborMetrix. The other coauthors reported having no financial disclosures. The Robert Wood Johnson Foundation, U.S. Department of Veterans Affairs, National Institute on Aging, and National Institute of Diabetes and Digestive and Kidney Diseases provided funding.
FROM JAMA SURGERY
Key clinical point: Reoperations after gastric band placement are common and raise concerns about the safety, effectiveness, and value of the device.
Major finding: During the study period, reoperations accounted for 47.6% of Medicare payments for laparoscopic gastric band procedures.
Data source: Medicare Provider Analysis and Review file of 25,042 beneficiaries who had gastric band procedures between 2006 and 2013.
Disclosures: Coauthor Justin B. Dimick, MD, disclosed a financial interest in ArborMetrix. The other coauthors reported having no financial disclosures. The Robert Wood Johnson Foundation, U.S. Department of Veterans Affairs, National Institute on Aging, and National Institute of Diabetes and Digestive and Kidney Diseases provided funding.