electrophysiological effects similar to quinidine

 prescribed to maintain normal sinus rhythm in patients prone to atrial fibrillation and flutter and is also used to prevent ventricular fibrillation or tachycardia.

 adverse side-effect profile

  is different from qunidine's in that disopyramide is not an alpha-adrenergic receptor blocker but is anti-vagal.

depresses contractility which may lead to congestive heart failure

 can cause torsades de pointes, a ventricular arrhythmia