Anomalous right coronary artery originating from the mid left anterior descending artery

Area of Science:

• Cardiology
• Anatomical Variations

Background:

• Coronary artery anomalies can present with diverse clinical symptoms, including chest discomfort.
• Accurate diagnosis is crucial for appropriate management and risk stratification.

Observation:

• A 68-year-old male with hypertension and hypercholesterolemia experienced recurrent chest discomfort.
• Initial investigations including ECG, echocardiogram, and myocardial perfusion study were inconclusive for significant ischemia.
• Coronary angiography revealed an unusual origin of the right coronary artery (RCA) from the mid-left anterior descending (LAD) artery.

Findings:

• The RCA originated distal to the first septal perforator and first diagonal branch of the LAD, with no atherosclerotic disease.
• The LAD showed non-obstructive disease in the mid-segment and severe calcification proximally.
• Cardiac CT confirmed the anomalous RCA course anterior to the right ventricular outflow tract.

Implications:

• This case highlights the importance of considering coronary artery anomalies in patients with atypical cardiac presentations.
• Advanced imaging modalities like cardiac CT are valuable for delineating complex coronary anatomy.
• Medical management was effective for this patient with an anomalous RCA and symptoms of ischemia.