NCIt definition : An uncommon congenital abnormality where the left ventricular myocardium fails to
compact during embryonic development, leading to cardiomyopathy with a variable degree
of ventricular dysfunction. There is genetic heterogeneity and phenotypic variability.
Characteristically, there are typically deep trabeculations in the noncompacted area,
with varying proportions of the LV myocardium compacted. LV noncompaction is associated
with rhythm abnormalities including Wolff-Parkinson-White syndrome, conduction defects,
and ventricular tachyarrhythmias.;