title: Sites of right ventricular outflow tract obstruction in tetralogy of Fallot--a retrospective study.
abstract: Fifty one angiographically proved cases of tetralogy of Fallot (TOF) in the age group of 5-50 years were analysed retrospectively for the level(s) of right ventricular outflow tract (RVOT) obstruction. Mean age was 18.1 +/- 11 yrs. Subvalvular stenosis was found to be the commonest site of RVOT obstruction in 49 (96.1%) patients. Evidence of valvular pulmonary stenosis was seen quite commonly (42/51, 83.9% cases), mostly in association with obstruction at other sites. Supravalvular stenosis was also seen in 17 (33.3%) cases. Higher incidence of pulmonary valvular involvement in patients with TOF, in higher average age of patient population may represent valvular involvement to be an acquired phenomenon.
authors.affiliation: Department of Cardiology, King George's Medical College, Lucknow.
authors.forename: S
authors.initials: S
authors.lastname: Agrawal
authors.forename: D
authors.initials: D
authors.lastname: Soni
authors.forename: S
authors.initials: S
authors.lastname: Dhawan
authors.forename: S K
authors.initials: SK
authors.lastname: Dwivedi
authors.forename: R K
authors.initials: RK
authors.lastname: Saran
authors.forename: V K
authors.initials: VK
authors.lastname: Puri
authors.forename: V S
authors.initials: VS
authors.lastname: Narain
authors.forename: M
authors.initials: M
authors.lastname: Hassan
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D011662:Pulmonary Subvalvular Stenosis / Q000150:complications*; D011666:Pulmonary Valve Stenosis / Q000150:complications*; D011859:Radiography; D012189:Retrospective Studies; D013771:Tetralogy of Fallot / Q000150:complications*; D014694:Ventricular Outflow Obstruction / Q000209:etiology*