Table 1. Characteristics of the study population.

	Gender (M/F)	Age (years)	Number (-)	QTc at low RR (ms)	QTc at mid RR (ms)	QTc at high RR (ms)
LQT1	13 / 21	33.9 ± 13.9	34	486 ± 44	460 ± 37	439 ± 33
LQT2	17 / 11	40.5 ± 15.1	28	498 ± 49	449 ± 35	427 ± 34
LQT3	4 / 7	35.2 ± 15.2	11	472 ± 45	439 ± 35	422 ± 35
Control	31 / 23	40.8 ± 15.8	54	446 ± 38	410 ± 26	392 ± 25
Total	65 / 62	38.4 ± 15.2	127	469 ± 47	435 ± 39	415 ± 36

Data are given as mean ± standard deviation. M = male, F = female, RR = RR-interval, QTc = Corrected QT using Bazett’s formula.