Exploration of Cardiology

Table 1

Arrhythmia severity classification [23]

VA	Arrhythmia burden rate (bpm)	Risk of mortality (hazard ratio, 95% Confidence Interval)
Mild	PVC ≥ 5% VT runs 120	1.2 [0.63–2.14]
Moderate	VT runs 120–179
Severe	VT runs ≥ 180 or history of sustained VT	2.94 [1.36–6.36]

VA

Arrhythmia burden rate (bpm)

Typical examples

Risk of mortality (hazard ratio, 95% Confidence Interval)

Mild

PVC ≥ 5%

VT runs 120

1.2 [0.63–2.14]

Moderate

VT runs 120–179

Severe

VT runs ≥ 180

or history of sustained VT

2.94 [1.36–6.36]

bpm: beats per minute; VT: ventricular tachycardia; nsVT: non-sustained VT