Right coronary artery aneurysm with associated arteriovenous fistula

Area of Science:

• Cardiology
• Vascular Medicine
• Anatomical Studies

Background:

• Coronary artery aneurysms (CAAs) are rare vascular abnormalities.
• Large CAAs, especially those communicating with cardiac chambers, present unique diagnostic and management challenges.
• Understanding the hemodynamics and collateral supply in such cases is crucial.

Observation:

• A 47-year-old male patient presented with an incidentally discovered giant right coronary artery aneurysm (78 x 69 mm).
• The aneurysm was noted to have a direct communication with the right ventricle.
• The patient was asymptomatic at the time of diagnosis.

Findings:

• The giant right coronary artery aneurysm demonstrated a significant communication with the right ventricle.
• Myocardial perfusion was predominantly supplied by the left coronary artery system, indicating extensive collateralization.
• The absence of symptoms despite the large aneurysm size suggests a slow-growing lesion or effective compensatory mechanisms.

Implications:

• This case highlights the importance of advanced imaging in diagnosing rare coronary artery anomalies.
• The findings underscore the potential for asymptomatic presentation of large CAAs, necessitating careful follow-up.
• Understanding the compensatory role of the left coronary artery in such scenarios provides insights into myocardial adaptation to vascular pathology.