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Dronedarone

決奈達隆
Mechanism of action:
Dronedarone 是一種胺碘酮(amiodarone)的去碘衍生物(non-iodinated analogue),具有多種離子通道阻斷作用。Dronedarone 能抑制鉀離子通道(potassium channels),阻斷心肌的延遲整流鉀電流(IKr 與 IKs),延長心肌動作電位與有效不反應期(effective refractory period,ERP),以降低異常再入性傳導(reentry)的發生機率。Dronedarone 能抑制鈉離子通道(sodium channels),減慢去極化相(phase 0 upstroke velocity),降低傳導速度,穩定心肌膜。Dronedarone 也能抑制 L 型鈣離子通道(L-type calcium channels),減少竇房結與房室結傳導。
Reference(s):
1. Schweizer PA et al. (2011). Dronedarone: current evidence for its safety and efficacy in the management of atrial fibrillation. Drug Des Devel Ther.
2. Patel PD et al. (2009). Dronedarone for atrial fibrillation: a new therapeutic agent. Vasc Health Risk Manag.
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