Related Experiment Videos
Radionuclide ventriculography for assessment of absolute right and left ventricular volumes in children
Insights
Equilibrium radionuclide ventriculography reliably measures cardiac output and ventricular volumes in children with heart disease. This non-invasive technique provides accurate data for both left and right ventricles, aiding in pediatric cardiology assessments.
Area of Science:
- Pediatric Cardiology
- Nuclear Cardiology
- Cardiovascular Imaging
Background:
- Accurate assessment of cardiac function is crucial in pediatric heart disease.
- Traditional methods for measuring ventricular volumes and cardiac output can be invasive or limited in children.
- Equilibrium radionuclide ventriculography (ERNV) offers a potential non-invasive imaging solution.
Purpose of the Study:
- To determine absolute right and left ventricular volumes and cardiac output using ERNV in children.
- To validate ERNV measurements against cineangiography in a pediatric cohort.
- To assess the reliability of geometric and count-based methods within ERNV.
Main Methods:
- 26 children (3 months–18 years) with heart disease underwent ERNV.
- ERNV volumes and cardiac output were measured using geometric and count-based methods.
- Results were compared with left and right ventricular cineangiography in subsets of patients.
Main Results:
- Both ERNV methods showed favorable agreement with cineangiography for left ventricular end-diastolic volume (r > 0.90).
- The count-based ERNV method correlated well with cineangiography for right ventricular assessment.
- Count-based ERNV cardiac output measurements also showed good correlation with cineangiographic values.
Conclusions:
- Equilibrium radionuclide ventriculography is a reliable method for measuring right and left ventricular volumes and cardiac output in children.
- ERNV provides accurate, non-invasive functional data for pediatric cardiovascular evaluation.
- This technique supports improved management of pediatric heart conditions.
Abstract:
We determined absolute right and left ventricular volumes and cardiac output from the equilibrium radionuclide angiogram in 26 children, ages 3 months to 18 years, with diverse types of heart disease. We validated these results by comparing them with left ventricular (20 patients) and right ventricular (16 patients) cineangiographic volumes and cardiac output. Radionuclide volumes and cardiac outputs were determined in two ways: by a geometric method (area-length for left ventricle, Simpson's rule for right ventricle) and by a count-based method (correcting ventricular regional counts for frame duration, acquisition time, venous blood counts and attenuation). Both methods for estimating left ventricular end-diastolic volume compared favorably with cineangiography (correlation coefficients greater than 0.90). The count-based method also correlated well for the right ventricle. End-systolic measurements were not possible. Count-based assessment of cardiac output also correlated well with cineangiographic values. We conclude that right and left ventricular volumes and cardiac output can be reliably measured in children with equilibrium radionuclide ventriculography.