True statement about Right coronary aery (RCA)
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
Diameter less than LCA
RCA arises from the aoa above the aoic valve
RCA supplies major pa of right atrium and right ventricle
RCA gives rise to circumflex coronary branch
Thorax