This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Accelerated idioventricular rhythm (AIVR) is most characteristically seen in? \nSelect and explain. \nA. AV nodal block, B. Myocardial reperfusion, C. Metabolic derangement, D. Digitalis therapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Three or more ventricular beats at a rate slower than 100 beats/min are termed an idioventricular rhythm . Automaticity is the likely mechanism. Idioventricular rhythms are common during acute MI , reperfusion and may emerge during sinus bradycardia. Atropine may be administered to increase the sinus rates if this is a concern. This rhythm is also common in patients with cardiomyopathies or sleep apnea. Specific antiarrhythmic therapy for asymptomatic idioventricular rhythm is not necessary. Ref Harrison 20thed pg 1757', 'role': 'assistant'}]