ventricular hypoplasia abnormal ventricle myocardium morphology myocardium hypoplasia ventricle myocardium hypoplasia MP:0010502 csmith 2010-09-30T03:49:55Z MPheno.ontology decrease in the number of normal cells in normal arrangement in the ventricle myocardium, typically resulting in decreased size ventricular myocardium hypoplasia myocardium of ventricle hypoplasia