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EVALUATION OF PULMONARY PERFUSION PATTERNS IN CHILDREN WITH TETRALOGY OF FALLOT

FRANCIS A. PUYAU M.D.1 and GEORGE R. MECKSTROTH PH.D.2

1 Professor of Pediatrics and Radiology, Head of Department of Radiology, Louisiana State University School of Medicine, New Orleans, Louisiana; Assistant Radiologist, Director of Pediatric Cardiac Catheterization Laboratory, Charity Hospital of Louisiana at New Orleans, New Orleans, Louisiana.
2 Professor of Radiology, Department of Radiology, Tulane University School of Medicine, New Orleans, Louisiana; Associate Director, Division of Nuclear Medicine, Charity Hospital of Louisiana at New Orleans, New Orleans, Louisiana.

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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I-S. Kang, A. N. Redington, L. N. Benson, C. Macgowan, E. R. Valsangiacomo, K. Roman, C. J. Kellenberger, and S.-J. Yoo
Differential Regurgitation in Branch Pulmonary Arteries After Repair of Tetralogy of Fallot: A Phase-Contrast Cine Magnetic Resonance Study
Circulation, June 17, 2003; 107(23): 2938 - 2943.
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