Sentence examples for rate variability spectrum from inspiring English sources

The heart rate variability spectrum will be computed with the non-parametric fast Fourier transform method.

Both neurally intact animals and those with right stellate ganglionectomy had equivalent increases of activity in the low frequency region of heart rate variability spectra during hypoxic stimulation.

We hypothesized that exposure to intermittent hypoxia would increase sympathetic efferent neuronal modulation of heart rate variability spectra in neurally intact animals and in those with right stellate ganglionectomy, and that his effect would be observed in heart rate variability spectra computed from baseline recordings.

In the present investigation we evaluated daily changes in heart rate variability spectra in conscious neonatal piglets that were either neurally intact (n = 5) or had undergone right stellate ganglionectomy (n = 5).

Overall, heart rate variability spectra during baseline conditions were dominated by high frequency activity, a reflection of parasympathetic efferent neuronal innervation and linkage to the ventilatory cycle manifested as respiratory sinus arrhythmia.

When spectra were computed from cardiac time series during representative hypoxic episodes, significant increases in activity across the low frequency region (0.05 – 0.15 Hz) of heart rate variability spectra were noted and were comparable in neurally intact animals and in those with right stellate ganglionectomy.

The very slow, 32 week period in hydrogen isotope ratios can also be found in her heart rate variability power spectrum.

Our successful application of the method for studying the autonomic influences on heart rate variability to the power spectra constructed from hydrogen isotope ratios in hair implies that the ANS also influences the variation in these ratios, most likely by modulating food and water intake and life style.

Our studies on the effect of vagal afferent electrostimulation on both cerebral evoked potentials (EvP) and the power spectrum of heart rate variability have yielded the following observations:.

* P < 0.05, bpm; beats per min. LFP/HFP; low-frequency power/high-frequency power (power spectrum of heart rate variability).

The power spectra of heart rate variability from this patient reflected his ANS failure.