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Updated: Jul 7, 2026
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Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children
Published on: April 29, 2013
Age-related decrease in cardiopulmonary adrenergic neuronal function in children as assessed by I-123
Wengen Chen1, Elias H Botvinick, Abass Alavi
1Division of Nuclear Medicine, Department of Radiology, Hospital of the University of Pennsylvania,, Philadelphia, PA, USA.
Summary
Cardiac and pulmonary metaiodobenzylguanidine (MIBG) uptake decreases with age in children. This study found a significant inverse correlation between MIBG uptake ratios and age in pediatric patients.
Area of Science:
- Nuclear medicine
- Pediatric imaging
- Adrenergic system evaluation
Background:
- Radioiodinated metaiodobenzylguanidine (MIBG) imaging assesses adrenergic nerve activity.
- Cardiac and pulmonary MIBG uptake predicts cardiopulmonary disease prognosis.
- Previous studies indicate reduced cardiac MIBG uptake in the elderly, but pediatric data is limited.
Purpose of the Study:
- To investigate age-related changes in cardiac and pulmonary MIBG uptake in children and adolescents.
- To establish normative data for MIBG uptake in the developing pediatric heart and lungs.
Main Methods:
- Retrospective analysis of 44 pediatric MIBG scans (age 2 months to 19 years) with normal uptake.
- Patients categorized into four age groups.
- Cardiac (heart-to-mediastinum [H/M] ratio) and pulmonary (lung-to-mediastinum [L/M] ratio) MIBG uptake determined and compared across groups.
Main Results:
- Both H/M and L/M ratios demonstrated a decrease with increasing age.
- Significant inverse correlations were observed between H/M ratio and age (r = 0.711, P < .001).
- Significant inverse correlations were observed between L/M ratio and age (r = 0.718, P < .001).
Conclusions:
- Pediatric cardiac and pulmonary MIBG uptake shows an inverse relationship with age.
- Findings provide normative data for age-related MIBG uptake in children.
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