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Lookup NU author(s): Professor Enoch AkowuahORCiD, Rebecca Maier, Professor Helen Hancock, Dr Ehsan Kharatikoopaei, Professor Luke ValeORCiD, Dr Cristina Fernandez-Garcia, Dr Emmanuel Ogundimu, Ayesha Mathias, Zoe Walmsley, Nicola Howe
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© 2023 American Medical Association. All rights reserved.Importance: The safety and effectiveness of mitral valve repair via thoracoscopically-guided minithoracotomy (minithoracotomy) compared with median sternotomy (sternotomy) in patients with degenerative mitral valve regurgitation is uncertain. Objective: To compare the safety and effectiveness of minithoracotomy vs sternotomy mitral valve repair in a randomized trial. Design, Setting, and Participants: A pragmatic, multicenter, superiority, randomized clinical trial in 10 tertiary care institutions in the UK. Participants were adults with degenerative mitral regurgitation undergoing mitral valve repair surgery. Interventions: Participants were randomized 1:1 with concealed allocation to receive either minithoracotomy or sternotomy mitral valve repair performed by an expert surgeon. Main Outcomes and Measures: The primary outcome was physical functioning and associated return to usual activities measured by change from baseline in the 36-Item Short Form Health Survey (SF-36) version 2 physical functioning scale 12 weeks after the index surgery, assessed by an independent researcher masked to the intervention. Secondary outcomes included recurrent mitral regurgitation grade, physical activity, and quality of life. The prespecified safety outcomes included death, repeat mitral valve surgery, or heart failure hospitalization up to 1 year. Results: Between November 2016 and January 2021, 330 participants were randomized (mean age, 67 years, 100 female [30%]); 166 were allocated to minithoracotomy and 164 allocated to sternotomy, of whom 309 underwent surgery and 294 reported the primary outcome. At 12 weeks, the mean between-group difference in the change in the SF-36 physical function T score was 0.68 (95% CI, -1.89 to 3.26). Valve repair rates (≈ 96%) were similar in both groups. Echocardiography demonstrated mitral regurgitation severity as none or mild for 92% of participants at 1 year with no difference between groups. The composite safety outcome occurred in 5.4% (9 of 166) of patients undergoing minithoracotomy and 6.1% (10 of 163) undergoing sternotomy at 1 year. Conclusions and relevance: Minithoracotomy is not superior to sternotomy in recovery of physical function at 12 weeks. Minithoracotomy achieves high rates and quality of valve repair and has similar safety outcomes at 1 year to sternotomy. The results provide evidence to inform shared decision-making and treatment guidelines. Trial Registration: isrctn.org Identifier: ISRCTN13930454.
Author(s): Akowuah EF, Maier RH, Hancock HC, Kharatikoopaei E, Vale L, Fernandez-Garcia C, Ogundimu E, Wagnild J, Mathias A, Walmsley Z, Howe N, Kasim A, Graham R, Murphy GJ, Zacharias J
Publication type: Article
Publication status: Published
Journal: JAMA
Year: 2023
Volume: 329
Issue: 22
Pages: 1957-1966
Print publication date: 13/06/2023
Online publication date: 13/06/2023
Acceptance date: 23/04/2023
ISSN (print): 0098-7484
ISSN (electronic): 1538-3598
Publisher: American Medical Association
URL: https://doi.org/10.1001/jama.2023.7800
DOI: 10.1001/jama.2023.7800
PubMed id: 37314276
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