Propranolol analog with the natural monoterpene structure as a potent antiarrhythmic drug.

Antiarrhythmic effects and intracellular electrophysiological properties of a new antiarrhythmic compound (-)trans-4-[2-hydroxy-3(N-isopropylamino)-propoxyimino]-cis-car ane (9) were studied in several models of arrhythmia and in isolated guinea-pig myocardial preparations. Compound 9 prevented the aconitine-induced arrhythmia, reversed the ouabin-induced arrhythmia depressed the maximum rate depolarization (Vmax), and shortened the action potential duration (ADP) and the effective refractory period (ERP). The data indicate that compound 9 is an effective antiarrhythmic presumably with a class 1 B mechanism of action.