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The Annals of Thoracic Surgery, Vol 44, 633-636, Copyright © 1987 by The Society of Thoracic Surgeons
DF Wensley, T Karl, JE Deanfield, MR de Leval, FJ Macartney and J Stark
The response to intravenous administration of propranolol hydrochloride was
studied in 24 children undergoing operation for isolated or complex right
ventricular outflow tract obstruction. Ten had pulmonary valve stenosis, 4
had pulmonary valve stenosis plus ventricular septal defect, 8 had
tetralogy of Fallot, and 2 had complex lesions. Propranolol (0.01 to 0.2 mg
per kilogram of body weight) was given to patients with a residual right
ventricular to left ventricular systolic pressure ratio greater than 0.75.
Four children did not respond to propranolol and required further surgical
intervention. Twenty patients responded, 2 of whom died. Fifteen were
restudied by cardiac catheterization 3 weeks to 27 months postoperatively.
The right ventricle-pulmonary artery gradient was 25 mm Hg or less in 13
patients. We conclude that a small dose of propranolol given
intraoperatively can identify patients in whom a reduction in the right
ventricle-pulmonary artery gradient to acceptable levels will occur in the
months following operation. This may reduce the need for placement of a
subannular or transannular patch in some patients.
ARTICLES
Assessment of residual right ventricular outflow tract obstruction following surgery using the response to intravenous propranolol
Cardiothoracic Unit, Hospital for Sick Children, London, England.
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