ECG library
Lateral STEMI
coreA 61-year-old smoker with an hour of crushing chest pain radiating to the left arm.
25 mm/s · 10 mm/mV · synthetic tracing
100%
Calipers:2000 ms50.0 small boxes30 bpm if R-RDrag the orange markers. One small box = 40 ms.
Key findings
- STE in I, aVL, V5-V6
- Reciprocal depression in III and aVF
Learning points
- Lateral infarcts can be electrically quiet; aVL is the lead most often overlooked.
- Reciprocal change is the strongest single confirmation that elevation is ischemic.
Connected