ECG library
Posterior infarction: the mirror pattern
advancedOngoing chest pain, and 'only ST depression' in V1 to V3.
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
- ST depression maximal V1-V3
- Ongoing pain
- Think in mirrors
Learning points
- The standard 12 leads have no posterior electrode; the anterior leads show the infarct reflected.
- Flip the tracing mentally (or physically): depression becomes elevation, tall R becomes Q.
Connected