Cardiac Valvular Angiectasis

A relatively high incidence of single and multifocal vascular anomalies were reported to arise on the atrio­ventricular valves of Sprague-Dawley rats from different commercial sources. The blood-filled structures were lined with normal-appearing endothelium and were often connected to one another by vascular channels. They arose most frequently on the septal cusp of the right atrioventricular valve near the atrioventricular ostium, although others were on other cusps and the left atrioventricular valve.