This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmias 1, Subject name: Medicine
[{'content': 'What is the best drug for the following rhythm disorder shown below? \nSelect and explain. \nA. Esmolol, B. Amiodarone, C. Vernakalant, D. Lignocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The video shows Atrial flutter with a 4:1 block with normal hea rate. To stabilize the macro-reentrant circuit, for rhythm control amiodarone is used. Amiodarone acts on multilple channels and pathways:- Na channel blocker K+ channel blocker Ca+ channel blocker b-blocker propey', 'role': 'assistant'}]