Acute coronary syndromes - ST-elevation myocardial infarction (STEMI)
Description
- Complete thrombotic occlusion of an epicardial coronary artery -> transmural ischaemia
- Type 1 MI - plaque rupture/erosion + occlusive thrombus
- Time is muscle - necrosis starts ~20-30 min, largely complete by 6-12 h
- Wavefront spreads subendocardium -> epicardium
| Leads | Territory | Artery |
|---|---|---|
| II, III, aVF | Inferior | RCA (or LCx) |
| V1-V4 | Anteroseptal | LAD |
| I, aVL, V5-V6 | Lateral | LCx / diagonal |
| V1-V3 ST depression + tall R | Posterior | LCx / RCA |
| V4R ST elevation | RV | Proximal RCA |
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