obsolete_conotruncal heart defect true Use http://www.orpha.net/ORDO/Orphanet_2445 label: 'Conotruncal heart malformations' http://www.orpha.net/ORDO/Orphanet_2445 Dani Welter true conotruncal and related malformations account for around a third of all congential heart defects and include a range of conditions including but not limited to tetralogy of Fallot, D-transposition of the great arteries, ventricular septal defects (conoventricular, posterior malalignment and conoseptal hypoplasia), double outlet right ventricle, aortic arch anomalies, truncus arteriosus, and interrupted aortic arch.