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Related Experiment Videos

Change in cardiac diastolic function in neonates

K Ichihashi1, P Ewert, G Welmitz

  • 1Department of Pediatric Cardiology, German Heart Institute Berlin.

Heart and Vessels
|January 1, 1997
PubMed
Summary

Neonatal diastolic function improves within the first month of life. Studies show increased ventricular relaxation and altered velocity parameters in healthy neonates, indicating significant developmental changes.

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Area of Science:

  • Pediatric Cardiology
  • Neonatal Physiology
  • Cardiovascular Research

Background:

  • Ventricular diastolic function is crucial for cardiac output.
  • Neonatal cardiac adaptation involves complex physiological changes.
  • Understanding diastolic function development in neonates is essential for identifying potential abnormalities.

Purpose of the Study:

  • To investigate changes in ventricular diastolic function in healthy neonates.
  • To assess the progression of diastolic parameters during the first month of life.
  • To determine if significant changes in diastolic function occur during the neonatal period.

Main Methods:

  • Doppler echocardiography was used to assess ventricular diastolic function.
  • Echocardiograms were performed on 25 healthy neonates at two time points: early neonatal period (1-6 days) and at 25-35 days.
  • Pulsed-Doppler method recorded ventricular inflow velocity curves, measuring peak and mean velocities, times, and diastolic velocity-time integrals.

Main Results:

  • Peak E and A velocities, and mean E and A velocities increased in both ventricles by one month.
  • Acceleration times shortened in both ventricles.
  • The ratio of peak E to (area E + area A), a load-independent index, increased in both ventricles, suggesting improved relaxation.

Conclusions:

  • Ventricular relaxation appears to increase in both ventricles one month after birth.
  • Significant changes in diastolic function occur even within the neonatal period.
  • These findings highlight the dynamic nature of neonatal cardiac adaptation.

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