Left ventricular noncompaction cardiomyopathy (LVNC), also known as spongy myocardium, is a distinct form of cardiomyopathy occurring in-utero when segments of spongy myocardium fail to transform into compact, mature musculature resulting in prominent myocardial trabeculae, deep intra-trabecular recesses, and decreased cardiac function. It has been proposed that LVNC results from arrest of the compaction process during the second month of embryological development.