Right atrioventricular atresia and ventricular septal defect in a foal.
Right atrioventricular atresia with a ventricular septal defect, a rare congenital cardiac anomaly of either animals or man, was diagnosed in a one week old Arabian foal. The foal had been weak and cyanotic since birth, sometimes becoming dyspneic when stressed. Necropsy revealed a dilated and hypertrophied left ventricle with the right ventricle being small. The right atrioventricular valve was absent. The right and left ventricles communicated via a septal defect which was located immediately adjacent to the aortic valve.
D000818:Animals; D006330:Heart Defects, Congenital / Q000473:pathology / Q000662:veterinary*; D006344:Heart Septal Defects, Atrial / Q000473:pathology / Q000662:veterinary; D006345:Heart Septal Defects, Ventricular / Q000473:pathology / Q000662:veterinary; D006734:Horse Diseases / Q000151:congenital* / Q000473:pathology; D006736:Horses