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Radionuclide evaluation of right and left ventricular function in children: validation of methodology
Insights
This study validates equilibrium radionuclide ventriculography for assessing pediatric heart function. The technique accurately measures right and left ventricular ejection fractions in children with heart disease.
Area of Science:
- Pediatric Cardiology
- Nuclear Cardiology
- Cardiovascular Imaging
Background:
- Assessing ventricular function is crucial for managing pediatric heart disease.
- Equilibrium radionuclide ventriculography (ERNV) is a non-invasive imaging technique.
- ERNV validation for pediatric use, especially with exercise, is limited.
Purpose of the Study:
- To validate the ERNV technique for assessing right and left ventricular function in children with heart disease.
- To compare ERNV-derived ejection fractions with cardiac catheterization data.
- To assess the reliability of ERNV during exercise in this population.
Main Methods:
- Seventy-one children (age 1-19 years) with heart disease underwent resting ERNV.
- Fifty-two children also performed exercise ERNV.
- Cardiac catheterization was performed in 39 children for comparison.
Main Results:
- Resting right ventricular ejection fraction correlated well with catheterization (r=0.83).
- Resting left ventricular ejection fraction correlated very well with catheterization (r=0.90).
- High interobserver correlations were observed for both resting (0.93-0.94) and exercise (0.92-0.97) ERNV.
Conclusions:
- Equilibrium radionuclide ventriculography is a valid method for assessing ventricular function in children with heart disease.
- The technique provides reliable measurements even during exercise.
- ERNV can aid in the long-term evaluation of treatment strategies for congenital heart defects.
Abstract:
Validation of an equilibrium radionuclide technique for assessing right and left ventricle function has not been reported in children with heart disease. Resting equilibrium radionuclide ventriculograms were performed in 71 children with diverse types of heart disease (age range 1 to 19 years, mean 10.2) with exercise studies in 52 of the children. Cardiac catheterization was performed in 39 of the 71 children within 2 weeks of radionuclide study. Resting left and right ventricular ejection fractions from radionuclide study and catheterization were compared by linear regression analysis: right ventricular ejection fraction, r = 0.83; left ventricular ejection fraction, r = 0.90. Interobserver correlations for right and left ventricular ejection fractions were 0.93 and 0.94, respectively. With exercise, the interobserver correlations for right and left ventricle were 0.97 and 0.92, respectively. Thus, right and left ventricular ejection fractions showed good correlations with cineangiographic ejection fractions. Furthermore, it was possible to perform this study in exercising children with no deterioration in interobserver correlations. This technique can provide important information on ventricular function in children and aid in long-term evaluation of current methods of treatment for several congenital heart defects.