[Right coronary ostial stenosis in homozygotic hypercholesterolemia. Coronarographic and echocardiographic diagnosis].

Ostial stenosis of the right coronary artery was discovered in 2 patients with homozygous familial hypercholesterolaemia. The lesion was confirmed in one case at post-mortem examination and in the other case by cross-sectional echocardiography. In both patients the stenosis could not be visualized at coronary arteriography when the right coronary vessel was selectively injected, but the lack of reflux of the contrast medium into the aortic sinus proved very useful for the diagnosis.