Exercise echocardiography predicts postoperative left ventricular remodeling in aortic regurgitation

Abstract

Objective. We aimed to investigate if preoperative left ventricular (LV) function assessed by exercise echocardiography could predict late postoperative LV function in aortic regurgitation (AR) patients and to evaluate how LV long-axis function is affected late after aortic valve surgery. Design. A total of 21 male chronic AR patients, aged 49 () years, accepted for surgery were examined preoperatively, 6 months-, and 4 years postoperatively, at rest and during exercise. Besides conventional echocardiographic parameters, the atrioventricular plane displacement (AVPD) by M-mode and peak systolic velocity (s’) in the basal LV by color tissue Doppler were measured. Results. Preoperatively EFrest and EFexercise, were 55()% and 54()%, respectively, and ∆EF 0()%. LV dimensions and volumes indexed to BSA had decreased at the 6-month follow-up and were stable at late follow-up. s'rest, s'exercise, AVPDrest, and AVPDexercise were unchanged at both the postoperative examinations (all P ≥ 0.05). Preoperative EFexercise and AVPDexercise showed inverse correlation to late postoperative indexed LV enddiastolic volume (r = –0.68, p < 0.004 and r = –0.86, P < 0.001) and indexed LV endsystolic volume (r = –0.68, P = 0.004 and r = –0.81, P < 0.001), while there was no correlation to preoperative EFrest and AVPDrest (all r < 0.2). Conclusions. Preoperative exercise echocardiography can detect AR patients with suboptimal LV remodeling late postoperatively.