Coronary artery anomalies may induce myocardial ischaemia and sudden cardiac death when associated with areas of compression or stenosis. We present a case of transection and reimplantation of an anomalous interarterial right coronary artery arising from a single left main coronary artery. The 18-year-old collegiate athlete had exertional chest pain and haemodynamically significant compromise to coronary blood flow.

We report an unusual case of a 12-month-old boy diagnosed with anomalous origin of a single coronary artery from the pulmonary artery associated with patent ductus arteriosus. The patient survival was attributed to left-to-right shunt (patent ductus arteriosus) allowing for appropriate myocardial perfusion. Successful surgical correction involved patent ductus arteriosus closure, mitral annuloplasty and reimplantation of the coronary artery into the aortic root.

We report an extremely rare case of a 14-month-old girl who was diagnosed with a single right coronary artery with coronary artery fistula communicating with the right ventricle and congenital absence of left coronary artery. Angiography showed a dilated and tortuous single right coronary artery draining into the right ventricle, absence of left coronary system, and left ventricular coronary circulation supplied via collateral vessels.

We describe the case of a 7-year-old girl with a single coronary artery. The coronary artery passed between the ascending aorta and pulmonary artery, and an aberrant vessel ran anterior to the latter.

Anomalous origin of a coronary artery from the aorta is a potentially serious anomaly that occurs in about 0.1–0.2% of the population. This percentage is small; however, it translates into about 4000 annual births with these anomalies. The clinical presentation of these anomalies is rare, and hence most are and will remain asymptomatic. The various anatomic anomalies are described, with anomalous origin of the left coronary artery that then passes between the aorta and pulmonary artery being the most serious of these anomalies. The pathophysiology resulting from these anomalies is described, as are methods for identifying those who require treatment; however, we still do not know the best methods of determining which patients need treatment.

A patient with the rare combination of an unusual form of pulmonary atresia with intact ventricular septum and a Marfan-like disease is presented. She was extremely cyanosed in childhood but improved after construction of a left peripheral shunt at the age of nine years. She deteriorated gradually after the onset of atrial fibrillation at the age of 33, the subsequent course being complicated by a stroke and, finally, by intractable heart failure and death at the age of 39.

A 3-month-old infant developed signs of cardiac failure, which was initially attributed to cardiomyopathy. At 8 months, further investigations showed evidence of myocardial ischaemia with reversal of the flow of blood in the left coronary artery, which received no demonstrable inflow from the aorta. An anomalous connection of this artery with the pulmonary trunk was diagnosed but, at surgery, it was found that the arterial orifice was completely atretic, although the main stem was of normal size. A left internal thoracic arterial graft to the anterior descending coronary artery was performed, but he died on the third day after the operation. Postmortem examination showed a small dimple within the aorta at the site of the orificial atresia, extensive myocardial infarction, and two zones of myocardial bridging of the anterior descending coronary artery. We discuss the relationship of coronary orificial atresia with single coronary artery. Although they are related, they typically have different and contrasting clinical presentations. The possible role of the myocardial bridging is also considered.