Physiological mechanisms in regulation of blood pressure fast frequency variations.
Spectral analysis of blood pressure fast oscillations (short-term variability), both in humans and animals, reveals three major frequential domains: the very low-, low- and the high-frequency domain. In this paper, experimental data providing evidence for physiological mechanisms involved in the regulation of blood pressure oscillations such as sympathetic nervous system, renin-angiotensin system, NO, respiration, heart function, and circulating blood volume are reviewed. In addition, novel evidence is provided by the author for vasopressin modulation of the low- and high-frequency blood pressure components. This review suggests that the multiplicity of factors involved in the genesis of the blood pressure spectral components imply utmost caution in interpreting spectral results.
Japundzic-Zigon
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Department of Clinical Pharmacology, Medical Faculty, University of Belgrade, Yugoslavia.
D000818:Animals; D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D001341:Autonomic Nervous System / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006439:Hemodynamics / Q000502:physiology; D006801:Humans; D012084:Renin-Angiotensin System / Q000502:physiology; D012119:Respiration / Q000502:physiology; D013997:Time Factors