Ventricular · Critical
Torsades de Pointes
● Live · lead II25 mm/s · 10 mm/mV
II
10-second rhythm strip · count the boxes
Rate200–250 bpm
RegularityIrregular
P wavesAbsent
PR intervalNone
QRSWide, polymorphic, amplitude waxes and wanes
Key features
- QRS axis 'twists' around the baseline
- Preceded by a long QT in sinus rhythm
- Often triggered by a short–long–short R-R sequence