True statement about Right coronary aery (RCA)
Correct Answer: RCA supplies major pa of right atrium and right ventricle
Description: Right coronary aery arises from anterior aoic sinus of ascending aoa.It is smaller than the left coronary aery. Branches A.Large branches 1.Marginal 2.Posterior interventricular B.Small branches 1.Nodal in 60%cases 2.Right atrial 3.Infundibular 4.Terminal AREA OF DISTRIBUTION 1.Right atrium 2.Ventricles-Greater pa of the right ventricle,except the area adjoining the anterior interventricular groove -A small pa of the left ventricle adjoining the posterior interventricular groove 3.Posterior pa of the interventricular septum 4.Whole of the conducting system of the hea except a pa of the left branch of the AV bundle.The SA node is supplied by the left coronary aery in about 40% of cases. REF.B D Chaurasia's human anatomy vol1.fifth edition
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