Tetralogy of Fallot true A congenital cardiac malformation comprising pulmonary stenosis, overriding aorta, ventricular septum defect, and right ventricular hypertrophy. The diagnosis of TOF is made if at least three of the four above mentioned features are present. DOID:6419 HP:0001636 Tetrology of fallot OMIM:187500 SNOMEDCT_US:86299006 ICD-10:Q21.3 NCIt:C84505 UMLS:C0039685 ICD9:745.2 SNOMEDCT:86299006 Conotruncal defect