Abnormal right ventricle morphology Right ventricular dilatation SNOMEDCT_US:253522006 Fyler:2333 Enlargement of the chamber of the right ventricle, which can be defined echocardiographically as a right ventricular to left ventricular ratio greater than 1:1. HP:0005133 Fyler:1827 Dilated heart right ventricle UMLS:C0344893 Ventricular dilatation is to be distinguished from ventricular aneurysm, which refers to a diastolic as well as systolic outpouching of the ventricle containing endocardium, epicardium, and thin-wall non-contractile scarred myocardium, which mainly develop in the setting of a full-thickness infarct, replaced by fibrous tissue because of myocardial infarction.