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Intercoronary connection with bidirectional blood flow and concentric left ventricular hypertrophy
G C Meireles1, L M Abreu Filho
1Humberto I (first) Hospital, São Paulo, Brazil.
Sao Paulo Medical Journal = Revista Paulista De Medicina
|October 1, 1994
Summary
A cardiac catheterization revealed an unusual connection between the right coronary artery and circumflex artery in a patient with chest pain. This large intercoronary connection allowed bidirectional blood flow, a rare finding in coronary artery disease.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Anatomy
Background:
- Atypical chest pain and ECG changes (Q-waves in DII, DIII, AVF) prompted cardiac catheterization in a 55-year-old male.
- Evaluation for coronary artery disease is standard in patients presenting with concerning cardiac symptoms and ischemic changes.
Observation:
- Cardiac catheterization revealed concentric left ventricular hypertrophy.
- A significant intercoronary connection was identified between the right coronary artery (RCA) and the circumflex artery (CX).
- This connection demonstrated bidirectional blood flow, with retrograde filling of the RCA upon selective CX injection and vice versa.
Findings:
- The right coronary artery (RCA) and circumflex artery (CX) appeared anatomically normal on initial assessment.
- The primary finding was a large, anomalous communication between the RCA and CX, facilitating bidirectional flow.
- This suggests a rare congenital or acquired arteriovenous fistula within the coronary circulation.
Implications:
- This case highlights a rare coronary anomaly that can mimic or complicate the diagnosis of ischemic heart disease.
- Understanding such intercoronary connections is crucial for accurate interpretation of coronary angiograms and guiding potential interventions.
- Further investigation into the embryological or pathological mechanisms of such connections may offer insights into coronary vascular development and disease.