,RIGHT CORONARY ARTERY:, The right coronary artery is a large vessel with a normal ostium giving rise to a moderate-size acute marginal branch and continuing as a large vessel to the crux of the heart supplying a left posterior descending artery and small posterolateral ventricular branches. 
,RIGHT CORONARY ARTERY : , The right coronary artery is a large vessel with a normal ostium giving rise to a moderate - size acute marginal branch and continuing as a large vessel to the crux of the heart supplying a left posterior descending artery and small posterolateral ventricular branches .