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Definition of the five types of arrhythmia
| Arrhythmia | Definition |
|---|---|
| Asystole | No QRS for at least 4 s |
| Extreme bradycardia | Heart rate lower than 40 bpm for 5 consecutive beats |
| Extreme tachycardia | Heart rate higher than 140 bpm for 17 consecutive beats |
| Ventricular tachycardia | 5 or more ventricular beats with heart rate higher than 100 bpm |
| Ventricular flutter/fibrillation | Fibrillatory, flutter, or oscillatory waveform for at least 4 s |
