Left ventricular to coronary sinus fistula following multiple mitral valve replacement surgeries.

Development of left ventricular to coronary sinus fistula is a rare complication of mitral valve surgery. Three of the seven previously reported cases occurred following multiple valve replacement surgeries, all of which were thought to be secondary to a complication of surgery and all were treated with surgical closure of the fistula. We report a case of left ventricular to coronary sinus fistula occurring after two mitral valve replacement surgeries that was treated medically with favorable long-term results.