A1 Refereed original research article in a scientific journal

Neonatal Outcomes in Very Preterm Infants With Severe Congenital Heart Defects: An International Cohort Study




AuthorsMikael Norman, Stellan Håkansson, Satoshi Kusuda, Maximo Vento, Liisa Lehtonen, Brian Reichman, Brian A. Darlow, Mark Adams, Dirk Bassler, Tetsuya Isayama, Franca Rusconi, Shoo Lee, Kei Lui, Junmin Yang, Prakesh S. Shah; and the International Network for Evaluation of Outcomes in Neonates (iNeo) Investigators

PublisherWILEY

Publication year2020

JournalJournal of the American Heart Association

Journal name in sourceJOURNAL OF THE AMERICAN HEART ASSOCIATION

Journal acronymJ AM HEART ASSOC

Article numberARTN e015369

Volume9

Issue5

Number of pages14

ISSN2047-9980

eISSN2047-9980

DOIhttps://doi.org/10.1161/JAHA.119.015369

Web address https://www.ahajournals.org/doi/10.1161/JAHA.119.015369

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/46958503


Abstract
Background Very preterm infants are at high risk of death or severe morbidity. The objective was to determine the significance of severe congenital heart defects (CHDs) for these risks.Methods and Results This cohort study included infants from 10 countries born from 2007-2015 at 24 to 31 weeks' gestation with birth weights <1500 g. Severe CHDs were defined by International Classification of Diseases, Ninth Revision (ICD-9) and Tenth (ICD-10) codes and categorized as those compromising systemic output, causing sustained cyanosis, or resulting in congestive heart failure. The primary outcome was in-hospital mortality. Secondary outcomes were neonatal brain injury, necrotizing enterocolitis, bronchopulmonary dysplasia, and retinopathy of prematurity. Adjusted and propensity score-matched odds ratios (ORs) were calculated. Analyses were stratified by type of CHD, gestational age, and network. A total of 609 (0.77%) infants had severe CHD and 76 371 without any malformation served as controls. The mean gestational age and birth weight were 27.8 weeks and 1018 g, respectively. The mortality rate was 18.6% in infants with CHD and 8.9% in controls (propensity score-matched OR, 2.30; 95% CI, 1.61-3.27). Severe CHD was not associated with neonatal brain injury, necrotizing enterocolitis, or retinopathy of prematurity, whereas the OR for bronchopulmonary dysplasia increased. Mortality was higher in all types, with the highest propensity score-matched OR (4.96; 95% CI, 2.11-11.7) for CHD causing congestive heart failure. While mortality did not differ between groups at <27 weeks' gestational age, adjusted OR for mortality in infants with CHD increased to 10.9 (95% CI, 5.76-20.70) at 31 weeks' gestational age. Rates of CHD and mortality differed significantly between networks.Conclusions Severe CHD is associated with significantly increased mortality in very preterm infants.

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