Radionuclide quantitation of right-to-left intracardiac shunts in children.
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چکیده
منابع مشابه
Radionuclide quantitation of right-to-left intracardiac shunts in children.
A simple, noninvasive method for measurement of right-to-left intracardiac shunts would enhance the management of patients with congenital heart disease. This study describes application of data processing techniques used previously in dye-indicator curves to data recorded during the initial transit of radioactive bolus through the central circulation. Radionuclide angiocardiograms were perform...
متن کاملQuantitation of left-to-right cardiac shunts with radionuclide angiography.
A quantitative radionuclide angiogram technique using an intravenous injection of technetium99m (Tc-99m) pertechnetate is described for quantitation of left-to-right shunts in the central circulation. Data analysis assumes exponential indicator clearance from normal cardiac chambers by dilution. A late prolongation of tracer disappearance compared to the initial clearance rate indicates an abno...
متن کاملRe: deconvolutional analysis in radionuclide quantitation of left-to-right cardiac shunts.
A poor bolus injection results in an unsatisfactory quantitative radionuclide angiocardiogram in as many as 20% of children with possible, left-to-right (L-R) cardiac shunts. Deconvolution analysis was applied to similar studies in experimental animals to determine whether dependence on the input bolus could be minimized. Repeated good-bolus, prolonged (greater than 2.5 sec), or multiple-peak i...
متن کاملDetection and quantitation of intracardiac left-to-right shunts by an oximetric inert gas technic.
Seienee 130: 709, 1959. 9.CiAnRK, L. C., JR., AND BARGERON, L. M., Jr.:Detection andlL direct recording of left-to-right shunts with thehydrogen electrode eatlheter.SLurgery 46: 7197, 1959. 110. Cm.iaK, L. C., JR.,BARGERON, Ti. A., J., L-YNwsa,C., BRADLEY, AM. N., ANDIxAnAtmu-THUInR, K. T.:l)etection of right-to-left shunts with an arterial lotentioometri e eleet...
متن کاملRadionuclide angiocardiography. Improved diagnosis and quantitation of left-to-right shunts using area ratio techniques in children.
A comparison of several reported methods for detection and quantitation of left-to-right shunts by radionuclides was performed in 50 children. Count ratio (C2/C1) techniques were compared with the exponential extrapolation and gamma function area ratio techniques. C2/C1 ratios accurately detected shunts and could reliably separate shunts from normals, but there was a high rate of false positive...
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ژورنال
عنوان ژورنال: Circulation
سال: 1981
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.64.3.572