4.2 Article

Differences in Eccentricity Index and Systolic-Diastolic Ratio in Extremely Low-Birth-Weight Infants with Bronchopulmonary Dysplasia at Risk of Pulmonary Hypertension

Journal

AMERICAN JOURNAL OF PERINATOLOGY
Volume 33, Issue 1, Pages 57-62

Publisher

THIEME MEDICAL PUBL INC
DOI: 10.1055/s-0035-1556757

Keywords

bronchopulmonary dysplasia; pulmonary hypertension; extremely low birth weight infants; eccentricity index; echocardiogram

Funding

  1. National Center for Advancing Translational Sciences of the National Institutes of Health [UL1TR001117]

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Objective To compare the left ventricular eccentricity index (EI) and tricuspid valve systolic-diastolic (SD) ratio in infants at risk of bronchopulmonary dysplasia (BPD) and pulmonary hypertension (PH). Study Design Review of echocardiograms performed on infants born at <= 28 weeks' postmenstrual age, categorized into the following three cohorts: BPD and PH (n = 13); BPD only (n = 16); and controls (n = 59). EI was measured from a parasternal short axis 2D image. The SD ratio was measured from the continuous wave Doppler tracing. Groups were compared using Kruskal-Wallis and Wilcoxon rank sum tests. Result EI and SD ratios were successfully measured in all infants. There were no differences between controls and BPD cohort. In contrast, the BPD and PH cohort had increased systolic EI (1.46 vs. 1.00-1.01), diastolic EI (1.47 vs. 1.00), and SD ratio (1.12 vs. 0.97-1.00) compared with controls and BPD only cohort (p <= 0.01 for all). Conclusion The EI and SD ratio may be useful as a screening tool for PH in this population.

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