Vemakalant

Description	Vernakalant, also known as RSD1235, is an investigational drug for the acute conversion of atrial fibrillation. Like other class III antiarrhythmics, vernakalant blocks atrial potassium channels, thereby prolonging repolarization. It differs from typical class III agents by blocking a certain type of potassium channel, the cardiac transient outward potassium current, with increased potency as the heart rate increases. This means that it is more effective at high heart rates, while other class III agents tend to lose effectiveness under these circumstances. It also slightly blocks the hERG potassium channel, leading to a prolonged QT interval. Vernakalant also blocks atrial sodium channels.
Pathways	Ion Channel/Membrane Transporter
Targets	Potassium Channel

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