Congenital Anomalies of the Left Main Coronary Artery: A Case Series

Area of Science:

• Cardiology
• Congenital Heart Disease
• Medical Imaging

Background:

• Coronary artery anomalies (CAAs) are uncommon congenital heart defects.
• Anomalous origin of the left circumflex artery (LCX) from the right sinus is most frequent, followed by anomalies involving the right coronary artery (RCA) and left anterior descending artery (LAD).
• The rarest CAA involves the left main (LM) coronary artery originating from the right coronary sinus.

Observation:

• This article presents four distinct cases of congenital LM coronary artery anomalies.
• Diagnoses were confirmed using coronary CT angiography (CCTA) and coronary angiography.
• Observed variations included LM originating from the right coronary sinus with pre-aortic or retro-aortic course, LM from the sino-tubular junction, and complete LM absence.

Findings:

• The study highlights rare variations in LM coronary artery origins and courses.
• Specific anomalies detailed: LM from right coronary sinus (pre-aortic/retro-aortic), LM from sino-tubular junction, and absent LM.
• These rare presentations underscore the diversity of congenital LM anomalies.

Implications:

• Accurate and timely diagnosis of rare LM coronary artery anomalies is crucial.
• Understanding these variations aids in appropriate patient management and follow-up strategies.
• Early detection through advanced imaging like CCTA can prevent potential complications.