2.3. The Classification and Definition for Coronary Dominance and Coronary Artery Anomaly
This protocol is extracted from research article:
Coronary Anomalies in 11,267 Southwest Chinese Patients Determined by Angiography
Biomed Res Int, Feb 18, 2021; DOI: 10.1155/2021/6693784

Coronary dominance is defined as the artery whose branches supply the blood of the posterior ventricular wall. Traditionally, the classification of CAAs was based according to Angelini et al.'s methods [11], namely, (a) anomalous pulmonary origins of the coronary arteries, (b) anomalous aortic origins of the coronary arteries, (c) congenital atresia of coronary arteries, (d) myocardial bridging, (e) CAFs, (f) coronary artery aneurysms, and (g) coronary stenosis.

Myocardial bridge (MB) [12] refers to a small segment of the coronary artery tunneling under the myocardium rather than resting on top of it, which presents stenosis compressed by the myocardium during the systole period and presents a normal beat during the diastole period. In the present study, the compressed stenosis of the MB segment was divided into 3 levels: mild (<50%), middle (50-75%), and severe (≥75%). CAFs refer to the abnormal connection between the coronary artery and other structures, including the coronary vein, heart chamber, or pulmonary artery. According to Altin et al. [4], coronary artery ectasia is an abnormal dilatation of the coronary artery segment with the dilated segment 1.5 to 2 times of the adjacent segment, while coronary aneurysm refers to the dilated segment that is more than 2 times of the adjacent segment.

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