Abstract 13583: Left Ventricular Remodeling After Type a Aortic Dissection Surgery: a Comparison Between Different Surgical Techniques

Abstract

Introduction: Type A aortic dissection (AADA) requires emergency surgery with different options including valve-sparing aortic root replacement (VSRR), supracoronary ascending aorta replacement (SCR) and aortic valve and root replacement (AVRR). Recurrence of aortic regurgitation (AR) and extent of left ventricular (LV) remodeling in patients with AADA was compared between these surgical techniques. Methods: A total of 120 patients (59 ± 12 years, 63% male) with AADA who underwent VSRR (n=22), SCR (n=62) or AVRR (n=36) were included in the present retrospective evaluation. AR grade and LV volumes and ejection fraction were assessed postoperatively (before hospital discharge) and during follow-up. Estimated marginal means ± standard error of the mean were obtained using linear mixed models. Results: Patients who underwent VSRR were significantly younger (49 ± 6 years) and more often male (84%). There were more patients in SCR group with hypertension compared to VSRR and AVRR (67% vs. 27% and 47%; p=0.006). The EuroSCORE II was highest in patients who underwent AVRR. After a median follow up of 53 months, the mean AR grade was 1.2 ± 0.2 in VSRR vs. 1.8 ± 0.2 in SCR vs. 0.2 ± 0.1 in AVRR (p<0.001). LV end-diastolic and end-systolic volumes remained stable in VSRR, while a significant increase was observed in SCR (table). The ejection fraction remained stable in all groups, however, a trend towards improvement was observed in VSRR (p=0.055). Conclusions: Patients with AADA who underwent SCR experienced more AR compared to AVRR resulting in larger LV volumes during follow up. Despite higher AR grade during follow up in patients who underwent VSRR compared to AVRR; there was no deterioration in LV volumes and function after VSRR.