Anomalous pulmonary venous return in a Great Dane.

A five-month-old male Great Dane dog was clinically diagnosed as having a complex cardiac anomaly, including anomalous drainage of pulmonary veins. Thoracic radiographs were indicative of this condition, but cineangiocardiography was required for confirmation. At necropsy, examination of the heart revealed that all pulmonary veins entered the right atrium rather than the left atrium as in a normal animal. In addition, a large ostium secundum-type interatrial septal defect and stenosis of the pulmonic valve were demonstrated.