Cardiac Valve Annulus Diameters in Extremely Preterm Infants: A Cross-Sectional Echocardiographic Study.

Abstract:

BACKGROUND:With the increasing incidence of births of very preterm very-low-birth-weight infants, there is a demand for echocardiographic reference values of cardiac dimensions. OBJECTIVES:The aim of this study was to provide reference values of cardiac valve annulus diameters in a cohort of extremely preterm very-low-birth-weight neonates and to correlate these with patient characteristics. METHODS:Valve diameters of 376 infants of < 32 weeks' gestation and with a birth weight of ≤2,000 g were measured using 2-dimensional echocardiography. Correlations between valve diameters and patient characteristics (birth length/weight, body surface area, gestational age, and sex) were assessed. Birth weight was used to establish linear regression models. Inter- and intraobserver agreement was assessed through intraclass correlation coefficient (ICC) analysis. RESULTS:Substantial variability was found (aortic valve mean [standard deviation; range]: 5.0 mm [0.6; 3.7-6.5]; pulmonic valve: 5.8 mm [0.8; 3.4-7.9]; mitral valve: 8.0 mm [1.0; 5.5-10.5]; tricuspid valve: 7.6 mm [1.2; 4.9-10.6]). There was a moderate correlation between birth weight and valve diameter (R2 aortic valve: 0.36; pulmonic valve: 0.20; mitral valve: 0.24; tricuspid valve: 0.24). Adequate intraobserver (ICC range 0.74-0.91) and interobserver agreement (ICC range 0.77-0.89) was found. CONCLUSIONS:Our study provides ready-to-use reference values for cardiac valve annulus diameters for extremely preterm infants.

journal_name

Neonatology

journal_title

Neonatology

authors

van Ark AE,Molenschot MC,Wesseling MH,de Vries WB,Strengers JLM,Adams A,Breur JMPJ

doi

10.1159/000488387

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

198-204

issue

3

eissn

1661-7800

issn

1661-7819

pii

000488387

journal_volume

114

pub_type

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