This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Maze operation is done in which of the following condition? \nSelect and explain. \nA. Atrial fibrillation, B. Complete hea block, C. Ebstein anomaly, D. Truncus aeriosus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Surgical ablation of AF is typically performed at the time of other cardiac valve or coronary aery surgery and, less commonly, as a stand-alone procedure. The Cox surgical Maze procedure is designed to interrupt all macroreentrant circuits that might potentially develop in the atria, thereby precluding the ability of the atria to fibrillate.', 'role': 'assistant'}]