title: Pulmonary hypertension as a cause of atrial fibrillation in young horses: four cases (1980-1989).
abstract: Four young horses of various breeds and suffering from atrial fibrillation died of heart failure. All had markedly high pulmonary arterial pressure, right-sided cardiomegaly, and lack of histologic lesions in the right atrium or pulmonary parenchyma. Three horses had hypertrophy and/or necrosis of the tunica media of the pulmonary vasculature. Clinical signs of disease, physiologic data, and pathologic findings indicated that these horses had primary pulmonary hypertension with secondary right-sided cardiac ventricular hypertrophy and dilatation, atrial fibrillation, and heart failure.
authors.affiliation: Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana 61801.
authors.forename: H B
authors.initials: HB
authors.lastname: Gelberg
authors.forename: D L
authors.initials: DL
authors.lastname: Smetzer
authors.forename: J H
authors.initials: JH
authors.lastname: Foreman
mesh_terms: D000818:Animals; D001281:Atrial Fibrillation / Q000209:etiology / Q000473:pathology / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000209:etiology* / Q000473:pathology; D006736:Horses; D006976:Hypertension, Pulmonary / Q000150:complications / Q000473:pathology / Q000662:veterinary*; D008297:Male; D012189:Retrospective Studies