Ventricular non-compaction, also known as "hypertrabeculation syndrome", is a genetic disorder which leads to a sponge-appearance of the left ventricular myocardium. Echocardiography is the main tool for making the diagnosis. If in doubt, magnetic resonance can be applied. There is not a lot of literature on the sequels of this abnormality but some patients develop cardiomyopathy. Watch this patient demo so that you will recognize the pathology when you see it.
Restrictive Cardiomyopathy or Endomyocardial Fibrosis
Creepy Creatures and the Heart
Ischemic Cardiomyopathy: Entire Echo Exam