the heart of a 6-week old arabian filly with a history of poor health and exercise intolerance revealed at postmortem examination , multiple cardiac malformations which included atresia of the right atrioventricular orifice ( tricuspid atresia , with associated atrial and ventricular septal defects ) , complete transposition of the great arteries , anomalous drainage of the venae cavae and coronary sinus into the left atrium , coarctation of the aorta , and a small but patent ductus arteriosus .
C0018787
cardiac
C0018818
ventricular septal defects