A 60 year old man presents with chest pain with last 6 hours and is diagnosed as acute myocardial infarction. Angiography showed involvement of anterior descending branch of left coronary aery. The most probable site of infarct is :
Answer is A (Anterolateral wall) Occlusion of anterior descending branch of lefi coronary aery leads to infarction of anterior wall of LV with or without involvement of the septum The site of involvement of Aeries and the corresponding sites of myocardial lesions: Left anterior descending aery (40-50%) Anterior wall of left ventricle near apex Ant. poion of ventricular septumdeg Apex Circumferentiallydeg Right coronary aery (30-40%) Inf post. wall of left ventricledeg Post. poion of ventricular septaedeg Inf post. right ventricular free Left circumflex aery (15-20%) Lateral wall of left ventricle except at apexdeg
Anterolateral wall
Posterior wall
Inferior wall
Septal