Coronary arcade: a rare anomaly of the coronary circulation

Area of Science:

• Cardiology
• Congenital Heart Disease
• Coronary Artery Anomalies

Background:

• Intercoronary communication, or coronary arcade, is a rare congenital coronary anomaly.
• Understanding the clinical significance of such anomalies is crucial for patient management.

Observation:

• A 65-year-old male presented with atypical chest pain and ventricular premature beats during exercise testing.
• Standard ECG and echocardiogram showed no abnormalities.
• Coronary angiography revealed no significant stenosis but identified a connection between the right coronary and circumflex arteries, indicative of a coronary arcade.

Findings:

• The case highlights a rare coronary arcade variant.
• The functional significance of this coronary arcade remains unclear.

Implications:

• Coronary arcade may lead to myocardial ischemia through a 'coronary steal' phenomenon.
• Alternatively, it might serve as a natural bypass, potentially offering a protective effect against atherosclerosis-induced ischemia.