Table 2. ECG features of PPCM patients and controls).

	PPCM patients (n = 54)	Controls (n = 77)	p-value
Sinus rhythm, n (%)	54 (100)	77 (100)
Premature ventricular or atrial extrasystoles, n (%)	5 (9.3)	4 (5.2)	0.365
Heart rate, beats/min	111 ± 16	90 ± 16	< 0.001*
Tachycardia, n (%)	36 (66.7)	17 (22.1)	< 0.001*
QRS duration (ms)	109.9 ± 23.6	98.6 ± 12.8	0.004*
QRS duration ≥ 110 ms	19 (35.2)	8 (10.4)	0.001*
QTc duration (ms)	445.0 ± 34.2	421.2 ± 18.9	< 0.001*
QTc duration ≥ 460 ms	12 (22.2)	3 (3.9)	0.001*
PR interval (ms)	148.1 ± 20.4	149.1 ± 21.1	0.799
ST–T-wave abnormalities	37 (68.5)	13 (16.9)	< 0.001*

*p-value statistically significant; values are expressed as means ± standard deviations or as numbers with percentages in parentheses.