Left ventricular–right atrial fistula complicating redo mitral valve replacement

We describe the case of a 58-year-old female patient who underwent redo mitral valve replacement and remained in heart failure. The diagnosis of a left ventricular–right atrial fistula was made. The fistula was closed surgically with a patch of autologous pericardium. The patient improved immediately after the operation and has been asymptomatic since.