Abstract 16182: Postoperative Outcome in Primary Mitral Regurgitation: Impact of Preoperative Exercise Pulmonary Hypertension

Introduction: The management of asymptomatic patients with primary mitral regurgitation (MR) remains controversial. Exercise-induced pulmonary hypertension (ExPHT) was recently reported as a strong predictor of rapid and frequent occurrence of symptoms, leading to surgery. We aimed to describe the impact of preop. ExPHT on postop. outcome in primary MR. Method: We prospectively included 109 (NYHA ≤ II) patients (68% male, 65±12 yrs) with primary MR and no LV dysfunction/dilatation, in which we performed exercise echocardiography, in 3 centers (Fr, Bel and Can). The presence of ExPHT was defined as an exercise systolic pulmonary arterial pressure >60mmHg. All patients were closely followed up and operated when indication for surgery was reached. Postop. events were defined as the occurrence of atrial fibrillation (AF), stroke, cardiac-related hospitalization or death. Results: Among the 109 patients included, 59 have developed ExPHT (58%) and these patients were significantly older than those without ExPHT...