This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 2, Subject name: Medicine
[{'content': 'A 60-year-old retired banker complains of feeling dizzy with palpitations and breathlessness. His BP becomes un-recordable while ECG is being recorded. What should be the first step in the management of this patient? \nSelect and explain. \nA. IV Amiodarone 150mg, B. IV Lasix 40mg, C. Cardioversion, D. IV lignocaine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ECG shows broad complex QRS tachycardia diagnostic of Ventricular tachycardia (MONOMORPHIC). Since the BP of the patient is crashing-Pt unstable - Rx- Cardioversion-DC Shock', 'role': 'assistant'}]