EVALUATION OF PULMONARY PERFUSION PATTERNS IN CHILDREN WITH TETRALOGY OF FALLOT

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Abstract
Twenty-one children with the tetralogy of Fallot were evaluated for pulmonary blood flow patterns employing radionuclide lung imaging and angiocardiograms. Four were studied before surgery, 7 after a shunt operation and 10 after total repair. Before surgery there is increased tracer concentration in the right lung because of the anatomy of the outflow tract of the right ventricle and pulmonary arteries. After a successful shunt operation, the distribution of tracer depends on multiple factors not entirely discernible from radionuclide lung images. After total repair radionuclide distribution is comparable to that before surgery, favoring the right lung, and frequently, exclusively so.

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