Coronary arteries

ECG changes in MI and corresponding arterial territories

Wall	Leads	Artery affected	Reciprocal changes
Anterior	V2 to V4	Left coronary artery Left Anterior Descending Artery (LAD)	II, III, aVF
Anterolateral	I, aVL, V3 to V6	LAD, Left Circumflex Artery	II, III, aVF
Septal	V1- V2	LAD	None (posterior leads)
Inferior	II, III, aVF	Right coronary artery	I, aVL
Lateral	I, aVL, V5-V6	Left circumflex artery Branch of left coronary artery	II, III, aVF
Posterior	V8-V9	Right coronary artery Left circumflex artery	V1-V3