title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 18-1974.
mesh_terms: D001344:Autopsy; D009202:Cardiomyopathies / Q000150:complications / Q000175:diagnosis / Q000473:pathology*; D003937:Diagnosis, Differential; D006329:Heart Conduction System / Q000473:pathology*; D006333:Heart Failure / Q000209:etiology / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009206:Myocardium / Q000473:pathology*