Most common site of myocardial infraction is:

Answer is A (Anterior wall of left ventricle) The most common site of myocardial infarction is the anterior wall of the left ventricle. The frequency of critical narrowing of aerial trunks and corresponding sites of myocordial lesions are as follows : Left anterior discending (LAD) 40 to 50% (Most common) Anterior wall of L.V. near apex (br. of LCA) Anterior poion of ventricular septum Right coronary aery (RCA) 30 to 40% Inferior/Posterior wall of L.V Post. poion of ventricular septum Inferior/posterior right ventricular free wall in some cases Left circumflex (br. of LCA) 15 to 20% Lateral wall of left ventricle except the apex.