Lignocaine is useful for the treatment of :
Atrial fibrillation
Paroxysmal supraventricular tachycardia
Digitalis induced ventricular extrasystoles
All of the above
(Ref: KDT 6/e p502) Lignocaine is used only for the treatment of ventricular arrhythmias, it has no role in atrial arrhythmia.
Other topics and Adverse effects