Noisy fluctuation of heart rate indicates cardiovascular system instability
| Autor: | Marc-Antoine Custaud, Jacques-Olivier Fortrat, Charlotte Baum, Christian Jeanguillaume |
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| Přispěvatelé: | Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM), Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Univ Angers, Okina, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Angers (UA) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Supine position Physiology [SDV]Life Sciences [q-bio] Posture Blood Pressure 030204 cardiovascular system & hematology Baroreflex Cardiovascular System Electrocardiography 03 medical and health sciences Tilt table test 0302 clinical medicine Heart Rate Tilt-Table Test Physiology (medical) Heart rate Syncope Vasovagal medicine Humans Heart rate variability Orthopedics and Sports Medicine Vasovagal syncope medicine.diagnostic_test business.industry Public Health Environmental and Occupational Health General Medicine medicine.disease [SDV] Life Sciences [q-bio] Blood pressure Anesthesia Female business 030217 neurology & neurosurgery |
| Zdroj: | European Journal of Applied Physiology European Journal of Applied Physiology, 2013, 113 (9), pp.2253-2261. ⟨10.1007/s00421-013-2655-2⟩ European Journal of Applied Physiology, Springer Verlag, 2013, 113 (9), pp.2253-2261. ⟨10.1007/s00421-013-2655-2⟩ |
| ISSN: | 1439-6319 1439-6327 |
| DOI: | 10.1007/s00421-013-2655-2⟩ |
| Popis: | International audience; Heart rate spontaneously fluctuates despite homeostatic regulatory mechanisms to stabilize it. Harmonic and fractal fluctuations have been described. Non-harmonic non-fractal fluctuation has not been studied because it is usually thought that it is caused by apparatus noise. We hypothesized that this fluctuation looking like apparatus noise (that we call “noisy fluctuation”) is linked to challenged blood pressure stabilization and not to apparatus noise. We assessed noisy fluctuation by quantifying the small and fastest beat-to-beat fluctuation of RR-interval by means of spectral analysis (Nyquist power of heart rate variability: nyHRV) after filtering out its fractal component. We observed nyHRV in healthy supine subjects and in patients with vasovagal symptoms. We challenged stabilization of blood pressure by upright posture (by means of a head-up tilt table test). Head-up position on the tilt table dramatically decreased nyHRV (0.128±0.063 vs. 0.004±0.002,p |
| Databáze: | OpenAIRE |
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