| Dexamethasone Given to Premature Infants and Cardiac Diastolic Function in Early Childhood. | |
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MedLine Citation:
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PMID: 21397911 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVES: To determine if dexamethasone given to premature infants with bronchopulmonary dysplasia would result in cardiac diastolic dysfunction in early childhood, a topic unstudied in humans. STUDY DESIGN: We compared seven children ages 3 to 8 years born at 26 weeks' gestation and given dexamethasone for bronchopulmonary dysplasia with eight gestation-matched and age-matched control children using echocardiography to assess measures of systolic and diastolic function. All dexamethasone patients had resolved hypertrophic cardiomyopathy. RESULTS: Dexamethasone patients had the same normal τ and isovolumic relaxation time (24.9 ± 2.8 and 54.6 ± 6.3 ms) as control patients (22.1 ± 3.0 and 48.8 ± 6.7 ms). Peak A velocities were the same in dexamethasone patients as in control patients (59.5 ± 15 versus 49.4 ± 5.8 cm/s, P = .10), resulting in unchanged E:A ratios (1.89 ± 0.57 versus 2.15 ± 0.43, P = .22). Peak E velocity and E-wave deceleration times were not different. We found no significant differences in measures of systolic function (heart rate-corrected velocity of circumferential fiber shortening, wall stress, and ejection fraction). Left ventricular mass was the same between the groups confirming resolution of hypertrophic cardiomyopathy. CONCLUSIONS: These data are consistent with normal myocardial relaxation, suggesting that long-term diastolic function is reassuringly normal in children who received dexamethasone as premature infants with resolution of hypertrophic cardiomyopathy. |
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Authors:
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Ivan H-B Wong; Alyson M Digby; Andrew E Warren; Dion Pepelassis; Michael Vincer; Robert P-C Chen |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-11 |
Journal Detail:
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Title: The Journal of pediatrics Volume: - ISSN: 1097-6833 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375410 Medline TA: J Pediatr Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Mosby, Inc. All rights reserved. |
Affiliation:
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Dalhousie University , Halifax, Nova Scotia, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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