small left ventriclecauses of hyperdynamic left ventriclehypercontractile left ventricletrabeculated ventriclecardiomyopathy left ventricledescription of right ventriclehypokinetic left ventriclehypertrophied left ventriclehypertrophic ventriclehyperkinetic left ventriclehypoplastic left ventricleborderline left ventricle