[Action of the calciumantagonistic compound gallopamile on sinus node, atrioventricular and intraventricular conduction (author's transl)].

The influence of the calciumantagonistic agent Gallopamile (D 600) on cardiac conduction and sinus node function was studied by using His bundle recordings and atrial stimulation in 13 patients with normal sinus rhythm. Intravenous administration of a single dose of 4 mg produced a significant increase in the atrioventricular conduction time by 30 %. On atrial stimulation second degree a-v block occurred at lower stimulation rates in all patients after Gallopamile. The impulse propagation in atrial tissue and within the His-Purkinje system was not affected, even in patients with diseased conduction system. There was an impairment in sinus node automaticity, the sinus node recovery time was increased by 58 % of the control value.