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The Journal of Thoracic and Cardiovascular Surgery, Vol 80, 211-216, Copyright © 1980 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
AS Gomes, PH Nath, A Singh, RV Lucas Jr, K Amplatz, DM Nicoloff and JE Edwards
In three cases, two in children and one in a young adult, ventricular
outflow obstruction was caused by a valvelike flap of accessory endocardial
tissue. The angiocardiographic feature was that of a narrow radiolucent,
crescent-shaped or linear filling defect corresponding to the site of
obstruction. Resection of the accessory tissue was performed in each case
at the time of correction of associated conditions. In one case (a woman 20
years of age) the obstructing membrane was in the outflow tract of the
right ventricle, and a ventricular septal defect was associated. In each of
the other two cases the outflow tract of the left ventricle was the site of
obstruction. In one (a 14-month-old boy), an ostium primum type of atrial
septal defect and cleft mitral valve were associated; in the remaining case
(a 7-year-old boy) complete transposition and ventricular septal defect
were also present. In the latter case a Mustard procedure was performed and
was followed by death. Successful results were obtained in the first two
patients.
ARTICLES
Accessory flaplike tissue causing ventricular outflow obstruction
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