Sites of right ventricular outflow tract obstruction in tetralogy of Fallot--a retrospective study
Agrawal, S.; Soni, D.; Dhawan, S.; Dwivedi, S.K.; Saran, R.K.; Puri, V.K.; Narain, V.S.; Hassan, M.
Indian Heart Journal 43(6): 455-459
1991
ISSN/ISBN: 0019-4832 PMID: 1823894 Document Number: 369629
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.