<prompt> A patient with hea failure developed recurrent sustained monomorphic vt .Treatment isare -EncainideFlecainideIntracardiac DefibrilatorBeta-blockers  <response>: 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 AC 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 