NCIt definition : The hydrochloride salt form of propafenone with class 1C antiarrhythmic effects. Propafenone
hydrochloride stabilizes the neuronal membrane by binding to and inhibiting voltage-gated
sodium channels, thereby reducing sodium influx required for the initiation and conduction
of impulses in Purkinje and myocardial cells. This agent produces a marked depression
of phase 0 and prolonged effective refractory period in the atrio-ventricular nodal
and His-Purkinje tissue, resulting in a profound decrease in excitability, conduction
velocity and automaticity, thereby counteracting atrial and ventricular arrythmias.;