Successful correction of a subendocardial hamartoma of the left ventricular free wall and mitral valve papillary muscles.

We describe a case of subendocardial hamartoma of the left ventricular free wall and mitral valve papillary muscles that resulted in a pseudoparachute mitral valve, a decrease in effective left ventricular cavity size, and the hemodynamic picture of a cardiomyopathy.