Key result
Amiodarone and desethylamiodarone exerted use-dependent effects on action potential duration and effective refractory period in isolated canine and rabbit cardiac tissues.
Amiodarone and its metabolite desethylamiodarone exert direct, concentration-dependent electrophysiologic effects on isolated cardiac tissues, providing mechanistic insights into their antiarrhythmic properties.
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Acute amiodarone and metabolite effects in isolated tissue warrant cautious interpretation; leaves open clinical translation and delayed-onset mechanisms.
Yabek et al. (1986) studied this question. Amiodarone and desethylamiodarone vs. Superfusion medium was evaluated on Electrophysiologic properties (APD90, ERP, etc.). Amiodarone and desethylamiodarone exerted use-dependent effects on action potential duration and effective refractory period in isolated canine and rabbit cardiac tissues.
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