Flecainide acetate (Tambocor) tablets are indicated for: Paroxysmal supraventricular tachycardias, including atrioventricular nodal reentrant tachycardia, atrioventricular reentrant tachycardia and other supraventricular tachycardias of unspecified mechanism. Paroxysmal atrial fibrillation/flutter. Symptomatic sustained ventricular tachycardia. Premature ventricular contractions and/or non-sustained ventricular tachycardia which are causing disabling symptoms.