ABSTRACT
Objective:To investigate the clinical characteristics, surgical methods and prognosis of patients with acute type A aortic dissection combining coronary artery involvement.Methods:415 patients diagnosed with acute type A aortic dissection from October 2016 to September 2019 were included in the study.Among them, 358 were males and 57 were females; aged(51.2±10.7) years old.According to the results of intraoperative coronary probes, 342 patients in the group were without coronary involvement, and the other 73 were with coronary involvement.Data on the coronary involvement classification, site, and treatment methods of the coronary involvement group were collected by consulting the ward medical record system.Meanwhile, preoperative baseline data, surgical data and prognostic results were retrospectively collected between the two groups. The data of the two groups were compared by chi- square test, t-test and Mann- Whitney U test. Results:Coronary involvement group: Among 73 (17.6%, 73/415) patients with coronary involvement, 8 (11.0%) in the left coronary, 48 in the right (65.8%), and 17 (23.3%)cases with involvement of both left and right coronary arteries. Classification of coronary artery(90) involvement: Neri A in 47(52.2%, 47/90), 33 with Neri B (36.7%, 33/90), and 10 with type Neri C (11.1%, 10/90). Type Neri B/C coronary artery involvement was mostly treated with artificial vascular coronary artery replacement or coronary artery bypass grafting. Comparison between the two groups show, patients in the coronary involvement group had higher preoperative levels of CK-MB, D-dimer and more severe aortic valve regurgitation compared to the coronary non-involvement group. The comparison of surgical data suggests that the coronary involvement group had a higher proportion of aortic root treatment, longer operation time, cardiopulmonary bypass time and aortic clamping time. A higher percentage of intimal tear located in the ascending aorta or aortic root was found in the coronary involvement group. The mortality rate in the coronary involvement group was significantly higher than that of the non-involvement group (12% versus 4%), and it was more likely to combine heart failure (5% versus 1%) and renal failure (26% versus 13%).Conclusion:Compared with pure type A dissection, patients with coronary artery involvement are more common in patients whose primary intimal tear were found at the proximal aorta, and are more prone to severe aortic valve regurgitation. Coronary artery treatment procedures include direct suture and fixation, coronary artery replacement, and coronary artery bypass grafting. Among them, Neri A coronary involvement can mostly be fixed with direct suture and stabilization, while the Neri B / C type mostly requires artificial vascular replacement of the affected coronary artery or coronary artery bypass. Patients with coronary artery involvement have a higher proportion of deaths and confer relatively higher risk of post-operative renal/cardiac failure.