In Vivo Antiarrhythmic Profile of AP-792 Assessed in Different Canine Arrhythmia Models.

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Abstract

The antiarrhythmic effects of a novel antiarrhythmic drug AP-792, 4-(5H-dibenzo[a,d]cyclohepten-5-ylidene)-1-[4-cyclohexylbutyl]piperidine hydrochloride, were analyzed using the epinephrine-, digitalis-and two-stage coronary ligation-induced canine ventricular arrhythmia models. Intravenous administration of AP-792 (0.3 or 1.0 mg/kg) effectively suppressed each of the ventricular arrhythmias, an action that resembles that of a typical cardioselective Ca2+ channel blocker, AH-1058. The antiarrhythmic action of AP-792 was slow in onset and longer-lasting than those in our previous studies using more than 50 antiarrhythmic drugs, including Na+ and Ca2+ channel blockers. These results suggest that AP-792 can become a unique long-acting antiarrhythmic drug.

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