224 Surgical Repair of Mitral Valve Prolapse: Hypertension and Other Determinants of Failure

Abstract

Abstract Aim It has been postulated that hypertension is associated with an increased likelihood of repair failure in patients with mitral valve prolapse. This study aims to assess whether there is a significant association between hypertension and disease recurrence and need for reoperation. Method A retrospective observational cohort study was conducted at a single centre in the United Kingdom. Patients who underwent surgical repair for mitral valve prolapse were identified between January 2011 and December 2020, with follow-up data collected to December 2021. Patients were classified as hypertensive if they had a pre- operative clinic blood pressure of 140/90 mm Hg or above. Treatment failure was confirmed by the presence of moderate or worse regurgitation on post-operative echocardiography and/or need for reoperation. Multivariate logistic regression and Cox regression were used for statistical analysis. Results A total of 278 patients were identified who had pre-operative blood pressure data available, of those 144 were hypertensive. By the conclusion of the study period, treatment failure occurred in 11.5% of the study sample. No significant association was identified between the presence of hypertension and treatment failure, or time to treatment failure. Concomitant atrial ablation was, however, found to be protective against treatment failure (odds ratio, 6.1; 95% confidence interval, 1.2 to 32.8) and associated with longer time to treatment failure (hazard ratio, 6.3; 95% confidence interval, 1.6 to 25.1). Conclusions There is insufficient evidence to demonstrate that hypertension is associated with treatment failure or time to treatment failure for patients undergoing surgical repair for mitral valve prolapse.