<prompt> Most common arteries are involved in Myocardial infarction:Right coronary arteryLeft coronary arteryLeft anterior descending coronary arteryLeft circumflex coronary artery  <response>: Left anterior descending coronary artery: Ref: 577-R 392- Basic pathology 8thMyocardial infarction: - Commonly affected arteries1. Left anterior descending coronary artery 40 to 50 infarct involves anterior wall of the left ventricle, near apex, anterior portion of ventricular septum; apex circumferentially2. Right coronary artery 30 to 40 infarct involves inferiorposterior wall of left ventricles, posterior portion of ventricular septum; inferiorposterior right ventricular free wall in some cases3. Left circumflex coronary artery 15 to 20 infact involves lateral wall of left ventricles except at apex. 