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': 'A patient with hea failure developed recurrent sustained monomorphic vt .Treatment is/are - \nSelect and explain. \nA. Encainide, B. Flecainide, C. Intracardiac Defibrilator, D. Beta-blockers', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sustained monomorphic VT associated with nonischemic cardiomyopathy is usually due to scar-related reentry. On cardiac MR imaging, scars are detectable as areas of delayed gadolinium enhancement and are more often intramural or sub-epicardial in location as compared with patients with prior MI. Any cardiomyopathic process can cause scars and VT, but cardiac sarcoidosis, Chagas disease, and cardiomyopathy due to Lamin A/C mutations are paicularly associated with monomorphic VT . An ICD is usually indicated with additional drugs or catheter ablation for control of recurrent VT. Harrison 20thed pg 1758', 'role': 'assistant'}]