Functional Mitral Regurgitation: An Interventional Cardiologist’s Perspective

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Functional mitral regurgitation (FMR) is common in patients with heart failure and portends a poor prognosis. The etiology is secondary to nonischemic or ischemic (postmyocardial infarction) adverse remodeling. Treatment includes guideline-directed medical therapy, cardiac resynchronization therapy, and in some cases, surgical repair or replacement. Transcatheter mitral valve (MV) repair with the MitraClip device is approved in patients with degenerative MR and is currently under investigation for use in FMR, as are several transcatheter MV replacement devices. This review discusses the basis of FMR pathophysiology, classification, and prognosis; provides an overview of current therapeutic approaches; examines the available literature on the use of MitraClip in patients with FMR; and provides insight into ongoing clinical trials and new investigational devices for the treatment of FMR.

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