coronary dominance pattern
Anatomical classification describing which coronary artery supplies the posterior descending artery and posterolateral branches.
Full Definition
Coronary dominance pattern refers to the anatomical variation in coronary artery blood supply to the inferior and posterior walls of the heart. Right dominance (85% of population) occurs when the right coronary artery (RCA) gives rise to the posterior descending artery (PDA) and posterolateral branches. Left dominance (8% of population) exists when the left circumflex artery supplies these vessels. Co-dominance (7% of population) involves shared supply from both systems. Understanding dominance is crucial for interpreting imaging findings, planning interventions, and predicting clinical outcomes, as the dominant vessel typically supplies the inferior wall, posterior wall, and often the AV node.
Usage
Usage note: Specify the type of dominance (right, left, or co-dominant) in all imaging reports.
In Context
- "The patient demonstrated right coronary dominance with the RCA supplying the PDA and posterolateral branches." — Cardiac catheterization report
- "Left dominant coronary anatomy explained the extensive inferior wall ischemia with circumflex artery occlusion." — Clinical correlation note