
Atrial fibrillation (AF) is a disorder that affects >2 million people in the United States. Firstline antiarrhythmic agents (per American College of Cardiology/American Heart Association/European Society of Cardiology guidelines) that are currently used to treat recent-onset AF work by indiscriminately blocking various ionic channels, thereby inducing a prolonged ventricular action potential duration or possibly inducing ventricular arrhythmias in the presence of myocardial ischemia because of excessive conduction slowing in diseased cardiac tissue. Vernakalant is an atrial-selective, potassium and sodium-channel-blocking agent awaiting FDA approval for the indication of conversion of recent-onset AF to normal sinus rhythm.



