Cardiac dominance is determined by coronary aery
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.
Supplying circulation to the SA node
Supplying circulation to the inferior poion of the interventricular septum
Supplying circulation to the inteatrial septum
Supplying circulation to the anterior poion of the interventricular septum
Thorax: Aerial supply