Surgical Repair of an Isolated Parachute-like Asymmetric Mitral Valve Defect in an Adult

摘要

Parachute mitral valve (PMV) is a congenital anomaly of the left ventricular papillary muscles. True PMV is characterized by the unifocal attachment of all chordae tendineae into a single papillary muscle group, while parachute-like asymmetric mitral valve (PLAMV) involves two papillary muscle groups with marked asymmetry in the distribution of chordae. Both defects often occur in association with other cardiac anomalies and, therefore, are typically diagnosed in early infancy or childhood. The diagnosis is rarely made in adults as only 1 of PMV is isolated. We report a case of isolated PLAMV in an adult in which more accurate preoperative diagnosis by echocardiography may have assisted with surgical planning.