DIAGNOSIS OF ACCESSORY MITRAL-VALVE TISSUE BY TRANSESOPHAGEAL ECHOCARDIOGRAPHY

Accessory mitral valve tissue is a rare cause of intracardiac mass and subvalvular left ventricular outflow tract obstruction. The preoperat ive diagnosis of this congenital anomaly has been facilitated by trans thoracic two-dimensional and Doppler echocardiography. However, transt horacic two-dimensional echocardiography cannot identify or correctly diagnose all cases of accessory mitral valve tissue. We report a patie nt in whom an intracardiac mass detected by transthoracic echocardiogr aphy was definitively diagnosed as accessory mitral valve tissue by tr ansesophageal echocardiography.