Ventricular endomyocardial biopsy in "primary" atrial fibrillation.
D000328:Adult; D001281:Atrial Fibrillation / Q000209:etiology*; D001706:Biopsy; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000473:pathology*; D006352:Heart Ventricles / Q000473:pathology; D006801:Humans; D008297:Male