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Sotalol

索他洛爾

Mechanism of action:

Sotalol 是一種非選擇性 β-腎上腺素阻斷劑(non-selective β-blocker)與鉀離子通道阻斷劑(potassium channel blocker)。β₁-腎上腺素受體主要分布於竇房結、房室結,β₂-腎上腺素受體則分佈於心房與心室心肌、血管平滑肌、支氣管平滑肌。這兩種受體皆為 Gs 蛋白偶聯受體,當 sotalol 阻斷 β₁ / β₂ 受體後,會降低竇房結自動性、減慢房室結傳導速度等。Sotalol 也會阻斷心肌細胞的延遲整流鉀離子通道(rapid delayed rectifier potassium current),延長動作電位持續時間、延長有效不反應期(effective refractory period)等。

​Reference(s):

1. Hanyok JJ et al. (1993). Clinical pharmacokinetics of sotalol. Am J Cardiol. 


2. Valdes SO et al. (2018). Early experience with intravenous sotalol in children with and without congenital heart disease. Heart Rhythm. 


3. Staudacher I et al. (2018). Cardiovascular pharmacology of K2P17.1 (TASK-4, TALK-2) two-pore-domain K(+) channels. Naunyn Schmiedebergs Arch Pharmacol.

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