Spectral analysis of heart rate variability in premature infants
作者： William Craelius , Thomas Hegyi , Mark Hiatt , Mujahid Anwar , Morarji Peesey
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摘要: We studied the effect of gestational age, birth weight, postmenstrual age and selected neonatal morbidities on heart rate power spectra in preterm infants (birth weight 1075 (840, 1230) grams, 27 (26, 30) weeks). Age at testing was 6 (3, 11) days. Birth were positively correlated with low frequency (0.03- 0.39 Hz) correlation coefficients 0.59, 0.54 0.53 respectively ( p< 0.05); high (0.4-1.0 (r-value 0.54, 0.58 0.50 respectively) total 0.41, 0.38 0.41 0.05) respectively). No significant observed for intraventricular hemorrhage, mechanical ventilation or methylxanthine use. Our data indicates increased variability maturation no major time when physiologically stable.
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