Medizinische Universität Graz - Research portal
Selected Publication:
Litscher, G; Schwarz, G; Pfurtscheller, G.
Computer-based analysis of continuous non-invasive blood pressure and heart rate variability-methodology and normal values during wakefulness and sleep.
Biomed Tech (Berl). 1993; 38(4):62-67
Doi: 10.1515/bmte.1993.38.4.62
Web of Science
PubMed
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FullText_MUG
- Leading authors Med Uni Graz
- Litscher Gerhard
- Co-authors Med Uni Graz
- Schwarz Gerhard
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- Abstract:
- Polysomnographic recordings were made in 10 healthy male adult subjects (mean age 25.1 +/- 2.8 years). Parameters were obtained from continuous non-invasive measurement of blood pressure and from heart rate spectra analysed both in the waking state and during sleep (stage 4). The total heart rate variability (mean +/- SE) was not significantly diminished (p < 0.2; paired t-test) during stage 4 sleep (6.2 +/- 0.5%) as compared with the waking state (7.1 +/- 0.5%). The relative heart rate variability coefficient within the frequency band HRV-II ((3-9)/min) was, however, significantly higher (p < 0.001) during slow-wave sleep (0.55 +/- 0.04) than during wakefulness (0.34 +/- 0.04). This fact is in accordance with results concerning an estimated value of the baroreflex sensitivity, which was also significantly higher (p < 0.001) during sleep stage 4 (7.0 +/- 0.8 ms/mmHg vs. 10.4 +/- 1.4 mmHg).
- Find related publications in this database (using NLM MeSH Indexing)
- Adult -
- Blood Pressure Monitors -
- Electrocardiography - instrumentation
- Fourier Analysis - instrumentation
- Heart Rate - physiology
- Humans - physiology
- Male - physiology
- Polysomnography - instrumentation
- Reference Values - instrumentation
- Signal Processing, Computer-Assisted - instrumentation
- Sleep Stages - physiology
- Wakefulness - physiology
- Find related publications in this database (Keywords)
- Continuous Noninvasive Blood Pressure Measurement
- Heart Rate Variability
- Baroreflex Sensitivity
- Polysomnography
- Biological Rhythm