Disopyramide (Dicorantil) 是一种用于研究室性和房性心律失常的 IA 类抗心律失常试剂。Disopyramide 阻断心肌快速内向钠电流 (sodium current)，延长心肌动作电位持续时间。Disopyramide 抑制 HERG 编码的钾通道 (potassium channels)。Disopyramide 也表现出复杂的蛋白质结合，并具有强大的负性肌力作用。 Disopyramide (Dicorantil) is a class IA antiarrhythmic drug with efficacy in ventricular and atrial arrhythmias. Disopyramide blocks the fast inward sodium current of cardiac muscle and prolongs the duration of cardiac action potentials. Disopyramide inhibits HERG encoded potassium channels. Disopyramide also exhibits complex protein binding, and has a potent negative inotropic action