Idiopathic prolonged QT interval and QT dispersion: the effects of propofol during implantation of cardioverter-defibrillator.

Local anaesthesia combined with conscious sedation is becoming a popular technique for implantation of cardioverter-defibrillator devices. Propofol was given to provide loss of consciousness during defibrillation shock administration, for induced ventricular fibrillation testing. Propofol was found to decrease QT interval and QT dispersion in two patients with idiopathic prolonged QT interval and QT dispersion. The findings of the procedure are reported.