[The effect of calypsol, thiopental sodium and fentanyl on the functional status of the sinoatrial node and the heart conduction system in patients with paroxysmal arrhythmias].

64 patients with paroxysmal arrhythmias caused in 44 cases by collateral atrioventricular pathways have been studied. Endocardial programmed electrical cardiostimulation was applied. It has been established that calypsol at a dose of 2 mg/kg significantly improves the functional state of the sinoatrial node, atrioventricular conduction and conduction in collateral atrioventricular pathways functioning both anterogradely and retrogradely.