Abstract
A comprehensive comparative analysis of hemodynamics, microcirculation (the method of laser Doppler flowmetry with an occlusion test and the optical tissue oxymetry), blood circulation neurohumoral regulation (analysis of heart rate variability, HRV) in apparently healthy young subjects with different levels of subjectively experienced emotional stress has been performed. Depending on the degree of everyday stress (acute and/or chronic), the character of the autonomic regulation of blood circulation, as well as the state of the microcirculation and its regulation substantially vary. Moderate stress is accompanied by coactivation of sympathetic-parasympathetic regulatory mechanisms with augmented HRV baroreflex regulation circuits, which compensates for hemodynamic changes and is not accompanied by hypotensive reactions. An increase in the activity of neurogenic and myogenic tones of microhemodynamics in the subjects with moderate stress, which determines a high probability of blood shunting in tested tissue and decrease in relative oxygen extraction, has been discovered. Moderate levels of stress are also associated with an increase in the latency of postocclusive vasoreactive hyperemia, which is considered to be an early sign of the endothelium-mediated dysfunction of microcirculation.
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Original Russian Text © O.S. Glazachev, E.N. Dudnik, 2012, published in Fiziologiya Cheloveka, 2012, Vol. 38, No. 5, pp. 50–57.
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Glazachev, O.S., Dudnik, E.N. The functional state of microcirculation and autonomic regulation in young subjects with different levels of subjectively experienced psychological stress. Hum Physiol 38, 493–499 (2012). https://doi.org/10.1134/S0362119712050064
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DOI: https://doi.org/10.1134/S0362119712050064