Sanja Zivanovic1, Kuberan Pushparajah2, Sandy Calvert3, Neil Marlow4, Reza Razavi5, Janet L Peacock6, Anne Greenough7. 1. Division of Asthma, Allergy and Lung Biology, Medical Research Council Centre for Allergic Mechanisms in Asthma, King's College London, London, United Kingdom. 2. Department of Paediatric Cardiology, Evelina Children's Hospital London, London, United Kingdom. 3. Department of Child Health, St George's Hospital, London, United Kingdom. 4. Neonatal Medicine, University College, London, United Kingdom. 5. Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom; NIHR Biomedical Research Centre at Guy's & St Thomas NHS Foundation Trust and King's College London, London, United Kingdom. 6. NIHR Biomedical Research Centre at Guy's & St Thomas NHS Foundation Trust and King's College London, London, United Kingdom; Division of Health and Social Care Research, King's College London, London, United Kingdom. 7. Division of Asthma, Allergy and Lung Biology, Medical Research Council Centre for Allergic Mechanisms in Asthma, King's College London, London, United Kingdom; NIHR Biomedical Research Centre at Guy's & St Thomas NHS Foundation Trust and King's College London, London, United Kingdom. Electronic address: anne.greenough@kcl.ac.uk.
Abstract
OBJECTIVES: To test the hypothesis that pulmonary artery pressures were higher in school aged children born extremely premature than those born at term. We also wanted to assess whether pulmonary artery pressures differed between children born prematurely with or without bronchopulmonary dysplasia (BPD) or between those randomized in the neonatal period to different ventilation modes. STUDY DESIGN:Transthoracic echocardiography was performed on 193 children born extremely premature (106 had BPD) and 110 children born at term when they were 11-14 years of age. Ninety-nine children born extremely premature had been supported by high-frequency oscillation and 94 by conventional ventilation. Tricuspid regurgitation was assessed in the apical 4-chamber and modified parasternal long-axis views. Continuous-wave Doppler of the peak regurgitant jet velocity was used to estimate the right-ventricular-to-right-atrial systolic pressure gradient. RESULTS:Tricuspid regurgitation was measurable in 71% (137/193) of the children born preterm and 75% (83/110) of the children born at term (P .23). The children born prematurely compared with the children born at term had a greater peak tricuspid regurgitation velocity (2.21 vs 1.95 m/s, P < .001) and the children born prematurely who had BPD vs those without BPD had a greater peak tricuspid regurgitation velocity (P = .023). There were no significant differences in pulmonary artery pressures according to neonatal ventilation mode. CONCLUSIONS:Pulmonary artery pressures were estimated to be greater in 11- to 14-year-old children born extremely prematurely compared with those born at term and in those born prematurely who developed BPD compared with those who did not but did not differ significantly by neonatal ventilation mode.
RCT Entities:
OBJECTIVES: To test the hypothesis that pulmonary artery pressures were higher in school aged children born extremely premature than those born at term. We also wanted to assess whether pulmonary artery pressures differed between children born prematurely with or without bronchopulmonary dysplasia (BPD) or between those randomized in the neonatal period to different ventilation modes. STUDY DESIGN: Transthoracic echocardiography was performed on 193 children born extremely premature (106 had BPD) and 110 children born at term when they were 11-14 years of age. Ninety-nine children born extremely premature had been supported by high-frequency oscillation and 94 by conventional ventilation. Tricuspid regurgitation was assessed in the apical 4-chamber and modified parasternal long-axis views. Continuous-wave Doppler of the peak regurgitant jet velocity was used to estimate the right-ventricular-to-right-atrial systolic pressure gradient. RESULTS:Tricuspid regurgitation was measurable in 71% (137/193) of the children born preterm and 75% (83/110) of the children born at term (P .23). The children born prematurely compared with the children born at term had a greater peak tricuspid regurgitation velocity (2.21 vs 1.95 m/s, P < .001) and the children born prematurely who had BPD vs those without BPD had a greater peak tricuspid regurgitation velocity (P = .023). There were no significant differences in pulmonary artery pressures according to neonatal ventilation mode. CONCLUSIONS: Pulmonary artery pressures were estimated to be greater in 11- to 14-year-old children born extremely prematurely compared with those born at term and in those born prematurely who developed BPD compared with those who did not but did not differ significantly by neonatal ventilation mode.
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