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Published on: January 26, 2019
Right ventricular function in children with severe respiratory syncytial virus (RSV) bronchiolitis
K Thorburn1, M Eisenhut, A Shauq
1Department of Pediatric Intensive Care, Royal Liverpool Children's Hospital - Alder Hey, Liverpool, UK. kent.thorburn@alderhey.nhs.uk
Insights
Severe respiratory syncytial virus (RSV) infection in children can cause reduced right ventricular function. This dysfunction was observed but not linked to myocardial or liver damage in a pediatric intensive care unit study.
Area of Science:
- Pediatric Cardiology
- Pediatric Critical Care Medicine
- Infectious Diseases
Background:
- Severe respiratory syncytial virus (RSV) infection in children is linked to myocardial damage and hepatitis.
- Understanding the impact on cardiac function is crucial for managing severe pediatric illness.
Purpose of the Study:
- To assess right ventricular (RV) function in children with severe RSV disease.
- To investigate the association between RV function and disease severity, myocardial damage, and hepatitis.
Main Methods:
- Prospective observational study in a pediatric intensive care unit (PICU).
- Echocardiographic assessment of RV function (Tei index) and left ventricular function.
- Measurement of cardiac troponin T, transaminases, and C-reactive protein levels.
Main Results:
- Twenty percent of ventilated children with severe RSV infection showed reduced RV function (elevated Tei index).
- No significant difference in left ventricular function, C-reactive protein, or transaminase levels based on RV function.
- Elevated cardiac troponin T occurred in 41% of patients, not significantly associated with RV function.
Conclusions:
- Reduced right ventricular function is present in severe RSV disease.
- The degree of RV dysfunction was not correlated with biochemical markers of myocardial/hepatic damage or respiratory support needs.
Background:
Previous studies have demonstrated the development of myocardial damage and hepatitis in children with severe respiratory syncytial virus (RSV) infection. The aim of this study was to assess right ventricular function in children with severe RSV disease and to investigate an association with disease severity, myocardial damage, and hepatitis.
Methods:
This was a prospective observational study performed at a 20-bed regional multidisciplinary tertiary pediatric intensive care unit (PICU) in a university-affiliated children's hospital. Pulse wave Doppler echocardiographic assessments with a calculation of the right ventricular function (Tei index), left ventricular ejection fraction and diameters, cardiac troponin T levels, transaminase and C-reactive protein levels were performed at admission on consecutive children who were ventilated and diagnosed with a severe RSV infection and without congenital heart disease.
Results:
Thirty-four ventilated children with confirmed RSV bronchiolitis were enrolled. The median age was 1.4 months (range 0.4-11.7), and the median length of ventilation was 5 days (range 2-10). Seven (20%) infants had an elevated right ventricular Tei index indicating reduced right ventricular function. Left ventricular function as well as C-reactive protein and transaminase levels were not different between patients with and without an elevated right ventricular Tei index. Cardiac troponin T was elevated in 14 patients (41%): 3/7 with an elevated and 11/27 with a normal Tei index (P=1). Ventilation and oxygenation indices and the duration of mechanical ventilation were not different between the two groups.
Conclusion:
A raised right ventricular Tei index, consistent with reduced right ventricular function, was observed in severe RSV disease, but the degree of dysfunction was not related to the level of biochemical myocardial or hepatic damage or level of respiratory support.
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