Healthy control group

Malignant ventricular arrhythmia group

t

P value

Mean

standard deviation

Mean

standard deviation

Tp-ec(mm)

75.97

16.67

141.59

45.10

−14.07

<0.001

Q-Tc(mm)

421.50

20.48

484.95

107.34

−5.81

<0.001

Tp-e/Q-T

0.18

0.04

0.29

0.05

−17.88

<0.001

SDNN

127.40

35.18

81.50

12.39

12.307

<0.001