Early Prosthetic Valve Malfunction Leading to Cardiogenic Shock and Emergency Redo Mitral Valve Replacement

摘要

Early onset prosthetic valve stenosis is an uncommon complication after valve replacement surgery and is often caused by thrombus formation. Frequently it can be diagnosed by echocardiography and managed with optimizing anticoagulation and/or thrombolysis. We review a unique case of early bi-leaflet mechanical heart valve (BMHV) dysfunction where the patient rapidly progressed to cardiogenic shock requiring emergent re-do mitral valve surgery. Intraoperatively, the valve leaflets were found to be almost completely immobile secondary to thrombus formation directly on the hinges of the valve. This case demonstrates how the leaflet orientation of a BMHV affects transmitral flow and fluid dynamics. Furthermore, we also discuss left atrial vortex formation in the setting of atrial fibrillation, kinetic energy transfer through an anatomically implanted mechanical mitral valve, and their roles in contributing to early prosthetic valve thrombosis despite adequate anticoagulation. (C) 2019 Elsevier Inc. All rights reserved.