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Collateral coronary circulation in the absence of obstructive coronary artery disease
Rajpal Abhaichand1, Yves Louvard, Thierry Lefèvre
1Institut Cardiovasculaire Paris Sud, Massy, France.
Insights
Congenital collateral coronary arteries can exist without obstructive coronary artery disease. These vessels, often found in the atrioventricular groove, differ from acquired collaterals secondary to stenosis or hypoxia.
Area of Science:
- Cardiovascular Medicine
- Anatomy
- Radiology
Background:
- Collateral coronary circulation typically indicates significant obstructive coronary artery disease.
- The development and origin of collateral vessels are not fully understood.
Observation:
- Two cases are presented with a large collateral artery despite angiographically normal coronary arteries.
- In both cases, the anomalous vessel was located in the atrioventricular groove, connecting the distal right coronary artery and the circumflex artery.
Findings:
- The described vessel is believed to be of congenital origin.
- Specific angiographic features are detailed to differentiate these congenital vessels from secondary collaterals caused by coronary stenosis or hypoxia.
Implications:
- This finding expands the understanding of coronary artery anatomy and variations.
- Distinguishing congenital collateral vessels is crucial for accurate diagnosis and management of coronary artery anomalies.
Abstract:
The presence of collateral coronary circulation almost always accounts for significant obstructive coronary artery disease and its development remains unclear. We present two cases wherein there was a large collateral artery in a patient with angiographically normal coronary arteries. In both cases, the vessel ran in the atrioventricular groove, between the distal right coronary artery and the circumflex artery. We believe that this vessel is of congenital origin and after reviewing the literature we describe the angiographic features that distinguish such a vessel from collaterals that are secondary to coronary stenosis or hypoxia.