<prompt> Most common site of artery of atherosclerosis -LADRCALCXDiagonal branch of LAD  <response>: Ans is a i.e., Left Anterior descending artery o The most common site of myocardial infarction us anterior wall of left ventricle and the most common artery involved is anterior wall of left ventricle located near apex.Myocardial infarctionCommonUncommonRareo Left anterior descendingo Left main coronary artery.o Penetratingartery 40-5OSecondary branchesInframyocardial branchesIt is branch of left coronary Diagnol branches of LAD.of coronary arteries,artery and affects. Marginal branches Anterior wall of i.v. near apex. Anterior portion of ventricular system. o Right coronary Artery 30-40 Inferior posterior wall of i.v. Posterior portion of ventricular septum. Infetriorposterior right ventricular free wall. o Left circumflex 15-20 Lateral wall of left ventricle except the apex. 