Heart disease trends:
BMJ Group Medical Reference
Verapamil is a type of drug called a calcium channel blocker. There's not much research on whether it can get your heart rhythm back to normal if you have atrial fibrillation.
One small study showed that no people who took verapamil got their normal heartbeat back, compared with 3 in 4 people who took another treatment called amiodarone. 
Verapamil (brand names Cordilox and Univer) can be given as tablets or injections.
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