Isolated Minimally Invasive Mitral Valve Surgery in Octogenarians: Perioperative Outcome.

Introduction: Despite the feasibility, safety, and excellent outcomes of mitral valve surgery through a right mini-thoracotomy, there is data paucity about its use in octogenarians. In this study, we assess the outcomes of mitral valve surgery via right mini-thoracotomy in octogenarians.

Methods: We performed a retrospective analysis of the in-hospital perioperative data of 38 octogenarian patients with severe mitral regurgitation undergoing isolated mitral valve surgery via right mini-thoracotomy from 2013 to 2021 in our institution.

Results: The median patient age was 82 (81-83) years, and the median EuroSCORE II was 3.1% (2.3-4.9). A total of 19 (50%) patients underwent mitral valve repair. The median cardiopulmonary bypass duration was 78 (54-100) min and the median aortic cross-clamping duration was 57 (40-70) min. Two (5.3%) patients were converted to sternotomy, 1 (2.6%) underwent renal replacement therapy, 5 (13.2%) underwent reexploration for bleeding or tamponade, and 12 (31.6%) underwent permanent pacemaker implantation. The surgical repair success rate was 89.5%, with 2 (10.5%) patients requiring reoperation due to repair failure. No other patients required reoperation on the mitral valve. The median intensive care unit stay was 1 (1-2) day, and the median postoperative stay was 9.5 (8-14) days. There was no perioperative stroke or death.

Conclusion: Despite a relatively increased risk of pacemaker implantation and reexploration for bleeding, our data support the feasibility of mitral valve surgery via a right mini-thoracotomy in octogenarians, with short ischemic times, low overall in-hospital morbidity, and no mortality. Preferring replacement in mitral diseases with a high risk for repair failure could minimize reoperations in this high-risk subgroup.