Table 3

QT Interval Parameters in Symptomatic and Asymptomatic SQTS Cases

CharacteristicsSymptomaticAsymptomatic
QT, msn3523
Mean ± SD270.2 ± 33.3299.5 ± 34.7
Median (IQR)280 (240–297)300 (285–317.5)
Overall range210–334240–401
QTc, msn3526
Mean ± SD296.9 ± 22.1319.8 ± 26.7
Median (IQR)302 (288.5–312)321.5 (304.8–332)
Overall range248–381262–379
QT/QTp, %n3523
Mean ± SD71.9 ± 5.077.4 ± 6.6
Median (IQR)73 (69.5–75)78 (74–80)
Overall range59–8564–93

Abbreviations as in Table 1.