Coronary artery congenital malformation

Coronary artery congenital malformation (also known as congenital coronary artery anomaly or congenital coronary artery malformation) refers to a group of rare structural abnormalities of the coronary arteries that are present from birth. These anomalies involve variations in the origin, course, or structure of the coronary arteries — the blood vessels that supply oxygen-rich blood to the heart muscle. Examples include anomalous origin of a coronary artery from the pulmonary artery (ALCAPA or ARCAPA), anomalous origin of a coronary artery from the wrong aortic sinus, coronary artery fistulas, and myocardial bridging. The cardiovascular system is primarily affected, and the clinical significance varies widely depending on the specific type of malformation. Symptoms can range from completely asymptomatic presentations discovered incidentally to life-threatening conditions. In severe forms, particularly anomalous left coronary artery from the pulmonary artery (ALCAPA), infants may present with heart failure, poor feeding, irritability, and failure to thrive within the first months of life. In older children and adults, symptoms may include chest pain (angina), shortness of breath, exercise intolerance, syncope (fainting), arrhythmias, and in some cases sudden cardiac death, particularly during or after vigorous physical activity. Some anomalies, such as coronary artery fistulas, may cause a continuous heart murmur detectable on physical examination. Diagnosis is typically made through echocardiography, CT coronary angiography, MRI, or conventional coronary angiography. Treatment depends on the type and severity of the anomaly. Hemodynamically significant malformations, such as ALCAPA, generally require surgical correction, which may involve reimplantation of the anomalous coronary artery or bypass grafting. Coronary artery fistulas may be treated with surgical ligation or transcatheter embolization. Patients with certain high-risk anomalies may be advised to restrict vigorous physical activity. Prognosis is generally favorable when the condition is identified early and appropriately managed, though lifelong cardiac follow-up is often recommended.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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