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': 'In the ECG shown below which drug is not to be given? \nSelect and explain. \nA. Amiodarone, B. Adenosine, C. Diltiazem, D. Beta-blocker', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ECG shows is atrial fibrillation. Drug Use Amiodarone Amiodarone is used to prevent recurrent AF unresponsive to beta-blockers. Adenosine Adenosine can conve relatively stable atrial flutter with 2:1 conduction and a hea rate of 150 to 1:1 conduction with a hea rate of 300 and cause rapid clinical decompensation. Because of this, adenosine can be dangerous when given to patients with atrial fibrillation, especially if they have a bypass track Diltiazem Prevents a rapid ventricular rate from developing if AF is conveed to "slow" AFL with the drug therapy. Beta-blocker Used for rate control in atrial fibrillation leading to hypotension and syncope.', 'role': 'assistant'}]