GROWTH PATTERNS OF CARDIAC STRUCTURES AND CHANGES IN SYSTOLIC TIME INTERVALS IN THE NEWBORN AND INFANT: <i>A Longitudinal Echocardiographic Study</i>

Oberhänsli, I; Brandon, G.; G, Lacourt; Friedli, Béat

doi:10.1111/j.1651-2227.1980.tb07068.x

Cited by 16 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present investigation presents data from a large population of preterm and term newborn infants. The values obtained in the term infants are in general in good agreement with previous reports (3,6,9,14). However, the measurements in the preterm infants show differences with those reported elsewhere.…”

Section: Discussionsupporting

confidence: 93%

Echocardiographic Measurements in Normal Preterm and Term Neonates

et al. 1986

View full text Add to dashboard Cite

To the purpose of better defining normative data on intracardiac dimensions and systolic time intervals in very low birth weight infants, we collected M-mode echocardiograms from 210 healthy preterm and term neonates with birth weights between 780 and 5,350 g and gestational ages ranging from 26 to 43 weeks. Fifty-nine neonates were less than 24 h, 62 were 25-48 h, and 89 were 48-144 h of age. Diastolic and systolic left ventricular dimensions increased gradually with advancing birth weight (r = +0.84 and 0.78). Left atrial and aortic root dimensions tended to show a parabolic relationship with birth weight, increments were reduced at higher birth weights (r = +0.92 and 0.85). The shortening fraction of the left ventricle (mean +/- SD 33.8 +/- 4.9%) and the left atrial/aortic ratio (1.16 +/- 0.10) were constant throughout all weight subgroups. Pre-ejection periods and ejection times of both ventricles were reduced in preterm infants due to their higher heart rates, but left and right ventricular PEP/ET ratios in preterm and term infants were comparable. Septal thickness in diastole and in systole tended to increase slowly with advancing birth weight, but correlation coefficients were low. This information is currently used as data base for a computer program to interpret M-mode echocardiograms performed in our nursery.

show abstract

Section: Discussionsupporting

confidence: 93%

Echocardiographic Measurements in Normal Preterm and Term Neonates

et al. 1986

View full text Add to dashboard Cite

show abstract

“…This has been well shown in term and older infants,7 but not previously documented in preterm babies over such a small age range. Reference ranges and research needs to take these changes into account, and further work on this change of measurements is needed.…”

Section: Discussionsupporting

confidence: 54%

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

Skelton

Gill

Parsons

1998

Heart

View full text Add to dashboard Cite

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, left ventricular posterior wall, left interventricular diameter at end systole and diastole, left atrium, and aortic root; Doppler measurements were made of maximum blood flow velocity (Vmax) through the pulmonary, aortic, mitral, and tricuspid valves. Results-Reference ranges are given. Cardiac dimensions correlated well with gestation and birth weight but Vmax did not. There was a significant increase in measurements over time. The "normal" preterm infant also appeared to often have asymmetrical septal hypertrophy. Antenatal dexamethasone administration did not appear to aVect the measurements. Conclusions-There is a close correlation with both gestation and birth weight for all physical measurements. Echocardiograms in preterm babies clearly diVer from those in older children and adults. (Heart 1998;80:281-285) Keywords: cardiac dimensions; blood flow velocity; preterm infant Echocardiography has been available for the evaluation of cardiac abnormality and function for over 20 years. Good reference ranges of cardiac measurements were soon produced for adults, children, and term infants.1 2 However, these have not been updated in line with improvements in scanning, or extended to include the large number of extremely small, premature infants surviving with modern intensive care. Normal values of blood flow velocities for such infants are even less well studied. While fully skilled cardiologists are required for the full assessment and diagnosis of cardiac abnormality, neonatologists are now using echocardiography to assess and investigate cardiac function, ductal patency, and changes in premature infants. There is therefore a need for new references ranges of values for the neonatal unit.Our main aim was to establish a reference range of measurements of cardiac size and blood flow velocities for the population of premature infants cared for in our neonatal unit. We followed these measurements over the first week and month of life. We also looked at the eVect on the measurements of a number of variables.We had also noticed, while examining preterm babies, that they often have features considered abnormal on adult echocardiography. For example, on tracings of the blood flow velocity across the mitral and tricuspid valves the usual ratio of a and e waves appeared to be inverted. Also the ratio of the interventricular septum to left ventricular posterior wall appeared to be increased. We therefore also looked at these two aspects of the echocardiographic examination in relation to the accepted adult features.

show abstract

“…The results of the aortic root dimension measurements in our normal group of fetuses agree with those of previous studies published about fetuses [1,8], premature infants [7,11], and full-term infants [5,6] . Only one study, however, has measured the size of the descending aorta in normally grown human fetuses [3] .…”

Section: Discussionsupporting

confidence: 93%

Two-dimensional and M-mode assessment of aortic growth in the normal and growth-retarded (IUGR) human fetuses

Veille

Sivakoff

1989

Pediatr Cardiol

View full text Add to dashboard Cite

This study compares human fetal aortic dimensions in 128 normal and 30 intrauterine growth-retarded (IUGR) fetuses using two-dimensional (2D) and M-mode echocardiography. We found that the fetal aortic root in the normally grown fetuses is significantly larger than the descending aorta at all gestational ages. Furthermore, IUGR fetuses had smaller descending aortic dimensions then did normally grown fetuses. When the descending aortic dimension in the IUGR fetuses was corrected for estimated fetal weight, it was found to be of comparable size to those of the normal fetuses. The difference in aortic size of growth-retarded fetuses is proportional to growth and therefore probably a secondary phenomenon.

show abstract

GROWTH PATTERNS OF CARDIAC STRUCTURES AND CHANGES IN SYSTOLIC TIME INTERVALS IN THE NEWBORN AND INFANT: A Longitudinal Echocardiographic Study

Cited by 16 publications

References 24 publications

Echocardiographic Measurements in Normal Preterm and Term Neonates

Echocardiographic Measurements in Normal Preterm and Term Neonates

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

Two-dimensional and M-mode assessment of aortic growth in the normal and growth-retarded (IUGR) human fetuses

Contact Info

Product

Resources

About