摘要Coronary artery anomalies (CAAs) are present at birth,but are usually asymptomatic and are found during coronary angiography or multi-slice computed tomography (MSCT) examinations.Their prevalence is less than 1.3％ based published series.1,2 The most common coronary anomaly is separate origin of the left anterior descending coronary artery (LAD) and left circumflex coronary artery (LCX) from the left sinus of the Valsalva.The second most common anomaly is the origin of the LCX artery from the right coronary artery (RCA) or right sinus of the Valsalva.We present two cases of coronary artery anomalies:one is the left main coronary artery (LMCA) arising from the proximal RCA,the other is the LAD originating from the proximal RCA.