ECG: Coronary Territories

Key points

• Anteroseptal (V1-V4): left anterior descending · inferior (II, III, aVF): right coronary
• Anterolateral (V4-6, I, aVL): LAD or left circumflex · lateral (I, aVL ± V5-6): left circumflex
• Posterior (tall R waves V1-2): usually left circumflex, also right coronary
• Wellens' syndrome = deep (> 2 mm), symmetrical T-wave inversion in the anterior precordial leads — critical proximal LAD stenosis in unstable angina