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Velocity vector imaging shows normal cardiac systolic function in survivors of severe bronchopulmonary dysplasia at six to 16 years of age.
Acta Paediatrica 2017 July
AIM: This study evaluated global myocardial function and associations between cardiac function and lung function in very low birth weight (VLBW) children, with and without severe radiographic bronchopulmonary dysplasia (BPD), at six to 14 years of age.
METHODS: We studied 34 VLBW and 19 term-born controls, and the VLBW group was further divided into a BPD group with severe radiographic BPD and those without radiographic BPD in infancy. Detailed right and left ventricular myocardial functions were analysed by velocity vector imaging, and the left ventricular mass was calculated. The associations between cardiac function and lung function were assessed by impulse oscillometry.
RESULTS: The right and left ventricular myocardial systolic functions and the left ventricular mass were similar in the three groups. Lung function was not associated with cardiac systolic function. Neonatal exposure to dexamethasone treatment was negatively associated with right ventricular function, as measured by the automated fractional area change, with an odds ratio of 7.9 and 95% confidence interval of 1.9-33.5 (p = 0.005).
CONCLUSION: Lung function measurements were not associated with cardiac systolic function in preterm infants at six to 14 years of age. Neonatal exposure to dexamethasone, used for weaning from the ventilator, was negatively associated with right ventricular function.
METHODS: We studied 34 VLBW and 19 term-born controls, and the VLBW group was further divided into a BPD group with severe radiographic BPD and those without radiographic BPD in infancy. Detailed right and left ventricular myocardial functions were analysed by velocity vector imaging, and the left ventricular mass was calculated. The associations between cardiac function and lung function were assessed by impulse oscillometry.
RESULTS: The right and left ventricular myocardial systolic functions and the left ventricular mass were similar in the three groups. Lung function was not associated with cardiac systolic function. Neonatal exposure to dexamethasone treatment was negatively associated with right ventricular function, as measured by the automated fractional area change, with an odds ratio of 7.9 and 95% confidence interval of 1.9-33.5 (p = 0.005).
CONCLUSION: Lung function measurements were not associated with cardiac systolic function in preterm infants at six to 14 years of age. Neonatal exposure to dexamethasone, used for weaning from the ventilator, was negatively associated with right ventricular function.
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