Sustained monomorphic VT in the setting of prior MI is typically due to scar-related reentry and is not due to acute ischemia. Although it may be appropriate to recommend revascular- ization when another indication for revascular- ization exists, revascularization alone is unlikely to reduce the recurrence of monomorphic VT and specific therapies such as antiarrhythmic medications or ablation may be needed to pre- On the contrary, revascu- larization might be beneficial in patients with CLINICAL STATEMENTS AND GUIDELINES ischemic heart disease and VF, polymorphic VT, or exercise-induced arrhythmias associated with 7.2. Nonischemic Cardiomyopathy Recommendations for Patients With NICM References that support the recommendations are summarized in Online Data Supplement 24. COR LOE Recommendations I B-NR In patients with suspected NICM from myocardial infiltrative processes, cardiac MRI with late gadolinium enhancement is useful for IIa B-NR In patients with suspected NICM, cardiac MRI with late gadolinium enhancement can be useful for assessing risk of SCA/SCD.S7.2-1 S7.2-3 IIa C-EO In patients with NICM who develop conduction disease or LV dysfunction at less than 40 years of age, or who have a family history of NICM or SCD in a first-degree relative (<50 years of age), genetic counseling and genetic testing are reasonable to detect a heritable disease that may clarify prognosis and facilitate cascade screening of relatives.S7.2-4,S7.2-5 Recommendation-Specific Supportive Text 1. Cardiac MRI allows for evaluation of structural heart disease and assessment of LV and RV func- tion including quantification of LVEF, LV mass and volume, and valvular structure. Cardiac MRI can help in the evaluation for myocardial infil- trative processes and evidence of scar, indicated by delayed hyperenhancement, associated with 2. The presence of delayed hyperenhancement has been associated with worse outcomes, including 3. It is important to consider genetic etiologies for NICM. 