Two cases of acute bioprosthetic mitral valve thrombosis immediately after mitral valve replacement.

In this manuscript the authors present two cases of early thrombosis of biological prosthesis following mitral valve replacement. Both patients were on venous arterial extracorporeal membrane oxygenation (ECMO), which could be the factor responsible for this unusual event. The authors advocate the use of more aggressive anticoagulation on patients on ECMO and prosthetic cardiac valves.