Dose-related tachycardia induced by pancuronium during balanced anaesthesia with and without droperidol

Pancuronium 0.02--0.08 mg kg-1 induced a dose-related increase of heart rate in patients anaesthetized with nitrous oxide supplemented with either fentanyl 0.003 mg kg-1 or fentanyl 0.003 mg kg-1 plus droperidol 0.15 mg kg-1. The tachycardia was more marked following the administration of droperidol.