<prompt>  A-48 year old presents with history of precordial chest pain. He has BP of 8060 mm of Hg. EKG shows wide QRS complex with no preceding P waves and a rate of 112min. The most immediate step in the management of this patient would beIntravenous lignocaineDC electrical cardioversionOverdrive atrial pacingPrimary percutaneous transluminal angioplasty 