Atrial & SVT · Watch
Wolff–Parkinson–White
● Live · lead II25 mm/s · 10 mm/mV
II
10-second rhythm strip · count the boxes
RateNormal in sinus
RegularityRegular
P wavesNormal
PR intervalShort (< 0.12 s)
QRSWide (> 0.11 s) because of the delta wave
Key features
- Slurred upstroke of the QRS (delta wave)
- Short PR
- Secondary ST-T changes