Ischemic mitral regurgitation (MR) affects 1.2 to 2.1 million patients in the United States, with more than 400,000 patients having moderate-to-severe MR [1]. As a consequence of left ventricular remodeling after postero-basal myocardial infarction (MI), the posterior papillary muscle moves laterally. This causes both anterior and posterior mitral leaflets to be tethered, and type 3B Carpentier leaflet motion (restricted motion during systole) and ischemic MR to occur.

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