030 * Biventricular Repair for Common Atrioventricular Canal Defect With Parachute Mitral Valve
Year: 2014
Type: conference-abstract
Abstract: Objectives: Parachute mitral valve can complicate repair of common atrioventricular canal (CAVC), and single ventricle palliation is sometimes preferred. The goal of this study is to review our single institutional experience in biventricular repair in this patient group. Methods: The demographic, procedural and outcome data were obtained for all children who underwent biventricular repair for complete CAVC with parachute (single LV papillary muscle) or forme fruste parachute mitral valve (closely spaced LV papillary muscles) from 2001 to 2012. Primary outcomes were survival, freedom from mitral stenosis (MS, defined as an inflow gradient ≥7 mmHg and post-capillary pulmonary hypertension) and freedom from mitral valve replacement. Results: A total of 24 patients were included (21 parachute, 3 forme fruste). There was 1 early death (4.2%). At discharge, 1 patient had more than mild regurgitation and 1 had MS. During a median follow-up of 3.7 years (IQR 4 months–5 years), there were 2 late deaths (8.3%), 6 patients (25%) presented significant mitral stenosis and 1 patient (4.1%) required a mitral valve replacement. Freedom from MS was 95 ± 4.9% at 1 year and 2 years, 83.1 ± 8.9% at 3 years, 64.7 ± 13.5% at 5 years and 51.7 ± 15.8% at 10 years. Complete cleft closure was not associated with a significantly different freedom from MV reoperation (log-rank test, P = 0.89) or significant mitral stenosis (P = 0.47). Conclusion: Biventricular repair in parachute mitral valve and CAVC is feasible with acceptable mortality and freedom from MS. The burden of reoperation on the mitral valve remains significant in this patient group.
Language: English
Subfield: Epidemiology
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2317406274