ACS anatomical correlation
| ECG Leads | Location | Coronary Artery | Complications |
| V1-V3 | Anteroseptal. | LAD | Left ventricular dysfunction:
-Decreased CO2 -CHF, LBBB, RBBB -Left PFB -Infranodal block (2 ̊or 3 ̊) |
| V2-V4 | Anterior | LAD | |
| I, aVL, V5, V6 | Lateral | LCxA | Left ventricular dysfunction:
-Decreased CO2 -CHF, Infranodal block (2 ̊or 3 ̊) |
| II, III, aVF | Inferior | RCA | -Hypotension (NTG/morphine) -Supranodal 1 ̊ HB
-A-fib/flutter -PACs Infranodal block (2 ̊and 3 ̊) -Papillary muscle rupture (murmur) |
| V4R (also II, III, aVF) | Right ventricular | RCA | |
| R waves in V1, V2 (also V7-9) | Posterior | RCA (90%), LCA (10%) | |
| avR (STE) | Anterolateral | Left Main |