When would you consider using Ibutilide for rapid pharmacologic cardioversion of atrial fibrillation?   

Someone already on anti-coagulation for paroxysmal or persistent atrial fibrillation. As well as someone with very recent onset atrial fibrillation/flutter in less than 24 hours. (Some may like less than 12 hours others less than 48 hours) Someone I planned on electrical cardioversion that day, h...