title: [Variations of distribution of the coronary arteries (apropos of 3,000 coronarographies)].
abstract: The various types of anomalous origin and unusual course and/or predominance of the coronary arteries encountered in a review of 3 000 selective coronary arteriograms were studied. 1. Abnormal ostia: Ectopic ostia with anterior, posterior or lateral displacement (11 cases). Variations in the number of ostia:--accessory ostium for the conus branch (68 cases);--distinct ostia for LAD and circumflex artery (21 cases);--single coronary artery (6 cases). 2. Abnormal course of coronary arteries: Anomalous circumflex origin from the right coronary artery (8 cases). Unusual predominance of the left coronary artery:--right predominance 74,5 %;--left predominance 14 %;--balanced 11,5 %. In aortic stenosis, the frequency of these different malformations is very different. Different patterns of vascularizattion of the centers of automatism and of the left ventricular free wall were also studied.
mesh_terms: D017023:Coronary Angiography; D003330:Coronary Vessel Anomalies; D003331:Coronary Vessels / Q000033:anatomy & histology*; D006801:Humans
vernacular_title: Variations de distribution des artères coronaires (à propos de 3 000 coronarographies).