Summary
Supine exercise equilibrium radionuclide right ventriculography was performed in 13 children (8–18 years) with hypercholesterolemia. Phase analysis was used to construct right ventricular regions of interest, and a peri-right ventricular region was used for background correction. Right ventricular ejection fraction at rest and exercise was 50.5±9.2% and 61.5±8.1%, respectively, with a mean increase of 11.0±7.5 percentage units (range 1–27 percentage units). During exercise, end-diastolic volume remained unchanged while end-systolic volume decreased by 19.4%, producing a 21.7% increase in stroke volume. Stroke volume ratios (left ventricular stroke volume counts/right ventricular stroke volume counts) approach unity (1.00±0.27). However, interobserver and intraobserver correlations are just fair, implying only a modest degree of accuracy and reliability of the procedure. This imprecision needs to be considered when evaluating the results of nuclear equilibrium right ventriculography.
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Schaffer, M.S., de Souza, M., Gilday, D.L. et al. Exercise radionuclide right ventriculography in children. Pediatr Cardiol 8, 235–240 (1987). https://doi.org/10.1007/BF02427535
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DOI: https://doi.org/10.1007/BF02427535