Table 4

Electrocardiographic Variables in Patients With TdP and LQTS

TdP Group (n = 83)LQTS Group (n = 40)
Baseline HR (beats/min)66 ± 1468 ± 12
On drug HR (beats/min)71 ± 1369 ± 13
Baseline QT (ms)381 ± 38388 ± 43
Baseline QTc (ms)408 ± 31416 ± 36
On drug QT (ms)598 ± 76547 ± 57
On drug QTc (ms)615 ± 70584 ± 48
ΔQT (ms)217 ± 79159 ± 61
ΔQTc (ms)207 ± 81168 ± 61
Baseline Tp–Te (ms)94 ± 2194 ± 16
On drug Tp–Te (ms)152 ± 39133 ± 30
ΔTp–Te (ms)58 ± 3439 ± 30

HR = heart rate; Tp–Te = T-wave peak to T-wave end; Δ = change; other abbreviations as in Table 1.

  • p < 0.05.

  • p < 0.001 compared with TdP group.