(a) Cardiac MR of the patient taken at diastole. Numerous hypertrabeculated segments with deep intertrabecular recessus separating them are visible in the mid segment of the lateral left ventricle (Arrowheads). Also note that the right ventricle was not affected by the disease process and fibrofatty infiltration was not present (asterisk). (b) Cardiac MR of the patient taken at systole (arrowheads). An endocardial-to- epicardial ratio of 2 in the lateral left ventricular wall was measured in the still frames taken at end-systole.