Reference ranges for cardiac dimensions and blood flow velocity in preterm infants

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Reference ranges for cardiac dimensions and blood flow velocity in preterm infants.

AIM To establish reference ranges for cardiac dimensions and Doppler measurements in preterm infants. METHODS 79 infants of less than 34 weeks' gestation were examined by echocardiography on days 0, 7, and 28 after birth, to produce a set of reference ranges and to examine changes in these indices over the first month of life. The following dimensions were measured: interventricular septum, l...

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Normal reference ranges for cardiac valve cross-sectional areas in preterm infants

Objective To establish normal reference ranges for cardiac valve crosssectional areas (CSAs) in preterm infants and their correlation with gestational age, body weight, and chronological age. Materials and Methods In a prospective study, 268 preterm babies fulfilling the criteria for inclusion were examined. Echocardiograms were performed to measure aortic, pulmonary, mitral, and tricuspid va...

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Intracranial pressure and cerebral blood flow velocity in preterm infants with posthaemorrhagic ventricular dilatation.

AIM To determine the volume of cerebrospinal fluid (CSF) that should be tapped in preterm infants with posthaemorrhagic ventricular dilatation as guided by intracranial pressure (ICP) and cerebral blood flow velocity (CBFV). METHODS The total number of measurements was 106 in 22 infants. Birth weights ranged from 630 to 2050 g, gestational age from 24.5 to 30.3 weeks, and age at insertion fro...

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Reference ranges for the linear dimensions of the intracranial ventricles in preterm neonates.

AIMS To establish normal ranges, in preterm infants < 33 weeks' gestation, for measurements of the lateral, third, and fourth ventricles and to assess intra-observer and inter-observer reliability. To assess the effect of head position during scanning on lateral ventricle size. To determine whether sex influences ventricle size. METHODS A prospective study involving infants < 33 weeks' gestat...

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Renal Blood Flow Velocity in Non-Distressed Preterm Infants during the First 72 Hours of Life

Renal blood flow velocity (RBFV) was studied with two­ dimensional/pulsed Doppler ultrasound in 28 non-distressed very preterm infants (mean ± SD gestational age was 27.3 ± 2.1 weeks and birth weight 907 ± 214 g) at 6, 12, 24, 36, 48, and 72 h of age. Mean arterial blood pressure (MABP), PaCC>2 , PaC>2 , and Hct were determined simultaneously. Mean RBFV increased significantly from 14.5 ± 1 . 9...

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ژورنال

عنوان ژورنال: Heart

سال: 1998

ISSN: 1355-6037

DOI: 10.1136/hrt.80.3.281