QT interval of the ECG, heart rate and arterial pressure using five non‐depolarizing muscle relaxants for intubation

186 patients without cardiovascular diseases or any preoperative drugs undergoing anaesthetic induction

Five non-depolarizing muscle relaxants (d-tubocurarine 0.5 mg/kg, alcuronium 0.3 mg/kg, pancuronium 0.1 mg/kg, vecuronium 0.1 mg/kg or atracurium 0.5 mg/kg) injected after thiopental induction, with premedication of either pethidine 1 mg/kg + atropine 0.01 mg/kg or pethidine 1 mg/kg alone

Comparisons between the different muscle relaxants, premedication regimens (with vs without atropine), and baseline values

QT interval, heart rate and arterial pressure during anaesthetic inductionsurrogate