<prompt> A patient develops Mitral Regurgitation following myocardial infarction. The likely cause for this complication isInfarction involving the valveRupture of chorda tendinaeDilatation of the ventricleAtrial fibrillation  <response>: B Rupture of chorda tendinae MR is frequently secondary to ischemia. Thus, it may occur as a consequence of ventricular remodeling or with fibrosis of a papillary muscle in patients with healed myocardial infarction. It may develop acutely in patients with acute infarction involving the base of a papillary muscle. 