<prompt> All of the following are seen in digitalis toxicity exceptVentricular bigeminyParoxysmal atrial tachycardia with fast ventricular rateRegularization of atrial fibrillationBidirectional ventricular tachycardia  <response>: Digitalis has a narrow margin of safety. T Toxicity in cardiac is manifested as ventricular premature beats, pulses bigeminy, ventricular tachycardia, atrial tachycardia, atrial fibrillation, atrial flutter Most common among these is pulses bigeminy REF. Essentials of medical pharmacology KD TRIPATHI 8th ed. 