<prompt> Lignocaine is useful for the treatment of:Atrial fibrillationParoxysmal supraventricular tachycardiaDigitalis induced ventricular extrasystolesAll of the above  <response>: Lidocaine It is used to suppress VT and prevent VF. It is ineffective in atrial arrhythmias. DOC for Digitalis induced ventricular extrasystoles 