Pharmacology Cardiovascular system 9c94431a Dofetilide belong to? A Class I antiarrythmic B Class II antiarrythmic C Class III antiarrythmic D Class IV antiarrythmic High-Yield Explanation Ibutilide, dofetilide, sotalol, amiodarone are class 3 agents they are potassium channel blockers- they r broad spectrum antiarrhythmic agents they increase QT interval