We report the case of a 41 years old woman who presented with massive bleeding after redo mitral valve replacement. A Left ventricular rupture, different from the three known types of wall rupture was hardly identified and controlled with extreme difficulty. The patient died eight days postoperatively due to disseminated intravascular coagulopathy. Retrospective analysis of the Echocardiographic examination was highly suggestive of abnormal position of the previously implanted mitral valve bioprosthesis with left ventricular outflow tract obstruction and weakness of the posterior wall of the left ventricular outflow tract.