Sites of right ventricular outflow tract obstruction in tetralogy of Fallot--a retrospective study.
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.
Agrawal
S
S
Department of Cardiology, King George's Medical College, Lucknow.
Soni
D
D
Dhawan
S
S
Dwivedi
S K
SK
Saran
R K
RK
Puri
V K
VK
Narain
V S
VS
Hassan
M
M
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*