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Anatomy Thorax: Aerial supply d62637e7

Cardiac dominance is determined by coronary aery

A
Supplying circulation to the SA node
B
Supplying circulation to the inferior poion of the interventricular septum
C
Supplying circulation to the inteatrial septum
D
Supplying circulation to the anterior poion of the interventricular septum
High-Yield Explanation
Cardiac dominance is determined by posterior inter ventricular aery which supplies postero inferior pa of interventricular septum. Mostly this a branch of RCA so right cardiac dominance(65% of population) If posterior inter ventricular aery arise from left coronary aery, then it is left cardiac dominance in 10% of population(bad prognosis) Multiple PIVA one from right side one from left side that is co -dominance in 25% of population.

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