Table 2. – ECG Findings of the Groups.

ECG Findings	Heroin (+) (n= 66)	Heroin (-) (n= 70)	p-value
Heart Rate, beat/min	77.25±12.84	71.43±11.22	0.02
PR, msc	147.83±29.49	151.12±33.19	0.54
Nonspecific ST segment-T wave changes, n (%)	8(12.1%)	4(5.7%)	0.18
QRS, msc	98.82±19.53	100.50±19.87	0.49
QT, msc	341.50±25.80	379.11±45.23	<0.01
QTc, msc	385.12±29.11	411.3±51.70	<0.01
Tpe, msc	65.41±10.82	73.3±10.13	<0.01
R wave peak time, msc	32.18±8.16	34.22±9.32	0.17
Tpe/QT	0.19±0.03	0.2±0.03	0.70
Tpe/QTc	0.17±0.03	0.18±0.03	0.15

*Independent Samples T-Test, Chi-square Test, Fisher’s Exact Test; Continues variables are reported as mean ± SD). Categorical variables are reported as n (%); p<0.05 statistically significant.