Anomalous aortic origin of coronary artery

Anomalous aortic origin of coronary artery (AAOCA) is a congenital heart defect in which one or both coronary arteries arise from an abnormal location on the aorta. The most clinically significant variants include anomalous aortic origin of the left coronary artery from the right sinus of Valsalva (AALCA) and anomalous aortic origin of the right coronary artery from the left sinus of Valsalva (AARCA). This condition is also sometimes referred to as anomalous origin of a coronary artery from the opposite sinus (ACAOS). In these anomalies, the aberrant coronary artery often courses between the aorta and the pulmonary artery (an interarterial course), which can lead to compression of the vessel, particularly during physical exertion. The primary body system affected is the cardiovascular system. Many individuals with AAOCA are asymptomatic and the condition may be discovered incidentally. However, in some cases — particularly with a left coronary artery arising from the right sinus — the anomaly can cause myocardial ischemia (reduced blood flow to the heart muscle), leading to symptoms such as chest pain, syncope (fainting), palpitations, shortness of breath during exercise, and in rare but devastating cases, sudden cardiac death, especially in young athletes. The risk of sudden cardiac death is a major concern and is the reason this condition receives significant clinical attention despite its relative rarity. Diagnosis is typically made through echocardiography, CT angiography, or MRI of the heart. Management depends on the specific anatomy, symptoms, and evidence of ischemia. Asymptomatic patients may be monitored with activity restriction and periodic imaging. Surgical intervention, most commonly unroofing of the intramural segment of the anomalous coronary artery, is recommended for symptomatic patients or those with high-risk anatomical features. Other surgical approaches include coronary reimplantation or bypass grafting. There are no established pharmacological treatments that address the underlying anatomical abnormality, and management guidelines continue to evolve as more data become available.

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

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