A Rare Case: Visualization of a Single Coronary Artery Originating from the Right Coronary Sinus Using Computed Tomography

Coronary artery anomalies are detected in 0.3–1.3% of patients undergoing angiography and in 1% of autopsy examinations. The origin of the left main coronary artery from the right coronary sinus is a rare condition, accounting for 1–3% of all coronary artery anomalies. This case presents the presence of a left main coronary artery originating from a single ostium in the right coronary sinus and includes a review of the literature. A 47-year-old male patient presented with chest pain and palpitations. His symptoms, which appeared with exertion, had worsened in recent days. Computed tomography (CT) angiography revealed that a single coronary artery originating from a single ostium in the right coronary sinus bifurcated into two branches after a short course, and the left main coronary artery passed in front of the pulmonary trunk. Coronary artery anomalies usually do not present symptoms and are often incidentally detected during coronary angiography. The origin of the left main coronary artery from the right coronary sinus is rare. In our case, the coronary artery originating from a single ostium in the right coronary sinus bifurcated into two branches after a short course. CT angiography should be used for the accurate diagnosis of such anomalies.

Keywords: Case report, CT angiography, right coronary sinus, single coronary artery.