Fig. 1

Measurement of left ventricle non-compaction (LVNC) with CMR. Illustration of the described method for measuring the trabeculated LV area in a patient with isolated LVNC. The trabeculated LV area was measured manually using a picture archiving and communication system on an end-diastolic frame of each short-axis slice (a). An endocardial border and non-compacted layer border were drawn to include the trabeculated area, and the papillary muscles were excluded from the measurement. We measured the most prominent non-compacted to compacted ratio in three long-axis views and also measured the mid-septal and mid-lateral walls and the apical trabeculation thickness in diastole; all measurements were performed perpendicular to the epicardium (b). A, apical trabeculation; C, compacted myocardium for Petersen’s criteria; ML, mid-lateral wall; NC, non-compacted area for Petersen’s criteria; S, mid-septal wall