Risk analysis for early mortality in emergency acute type A aortic dissection surgery: experience of Tokyo Acute Aortic Super-network.

OBJECTIVES We investigated the various pre- and postoperative complications related to early (30-day) mortality after open surgery for acute type A aortic dissection. METHODS Data from the Tokyo Acute Aortic Super-network database spanning January 2015 to December 2017 were retrospectively reviewed. Pre- and postoperative factors related to early postoperative mortality were assessed in 1504 of 2058 (73.0%) consecutive patients [age: 66.6 (SD: 13.5) years, male: 52.9%] who underwent acute type A aortic dissection repair. RESULTS The early mortality rate following surgical repair was 8.9%. According to multivariable analysis, male sex [odds ratio (OR) 1.670, 95% confidence interval (CI) 1.063-2.624, P = 0.026], use of percutaneous circulatory assist devices (n = 116, 7.7%) including extracorporeal membrane oxygenators or intra-aortic balloon pumps (OR 4.857, 95% CI 2.867-8.228, P < 0.001), shock (n = 162, 10.8%) (OR 3.06, 95% CI 1.741-5.387, P < 0.001), cardiopulmonary arrest (n = 41, 2.7%) (OR 7.534, 95% CI 3.407-16.661, P < 0.001), coronary ischaemia (n = 36, 2.3%) (OR 2.583, 95% CI 1.042-6.404, P = 0.041) and cerebral ischaemia (n = 59, 3.9%) (OR 2.904, 95% CI 1.347-6.261, P = 0.007) were independent preoperative risk factors for early mortality, while cardiac tamponade (n = 34, 2.3%) (OR 10.282, 95% CI 4.640-22.785, P < 0.001), cerebral ischaemia (n = 80, 5.3%) (OR 2.409, 95% CI 1.179-4.923, P = 0.016) and mesenteric ischaemia (n = 15, 1.0%) (OR 44.763, 95% CI 13.027-153.808, P < 0.001) were independent postoperative risk factors. CONCLUSIONS Not only critical preoperative conditions but also postoperative cardiac tamponade and vital organ ischaemia are risk factors for early mortality after acute type A aortic dissection repair.