obsolete_Eisenmenger syndrome true Eisenmenger syndrome (ES) is an form of pulmonary arterial hypertension (PAH) associated with unoperated congenital heart disease and is characterized by congenital heart malformations (see these terms) with reversed or bi-directional shunting through an intra-cardiac or intervascular (usually aorto-pulmonary) communication with the development of PAH. Eisenmenger's Syndrome Orphanet:97214 3.88.0 http://purl.obolibrary.org/obo/MONDO_0019944 ES Replaced by Mondo term MONDO_0019944, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0019944 UMLS:C0013743 MedDRA:10058554