摘要： Abstract: Objective Although the majority of coronary artery anomalies are found incidentally and not clinically significant,
the interarterial course between the major vessels of the aberrant artery may be responsible for syncope, angina, arrhythmias or
sudden death. There are only a few case reports describing the origination of all the coronary arteries from a single ostium. This
anomaly occurs in only 0.024%-0.044% of the population. Left coronary artery originating from the right coronary is a rare
coronary abnormality. Here we report a case of acute myocardial infarction in a patient with anomalous left coronary artery
originating from the right coronary artery, as was confirmed by computerized tomography angiogram, which showed that only
one single coronary artery stem originating from the right sinus of Valsalva trifurcated into a right coronary artery, left
circumflex artery and a hypoplastic left anterior descending artery. Subsequent percutaneous coronary intervention (PCI)
procedures were performed successfully. PCI procedures should be carried out with great caution in such cases, and this
condition should be managed as a left main lesion.