Ischemia · Critical
Inferior STEMI
● Live · lead II25 mm/s · 10 mm/mV
III
10-second rhythm strip · count the boxes
RateOften slow (vagal, AV nodal ischemia)
RegularityRegular
P wavesNormal
PR intervalMay prolong (AV block common)
QRSNarrow
Key features
- ST elevation in II, III, aVF (III > II suggests RCA)
- Reciprocal depression in I and aVL
- Get right-sided leads: STE in V4R = RV infarct