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THE COMPARATIVE ANALYSIS OF THE VEGETATIVE STATUSIN PATIENTS WITH DIFFERENT FORMS OF ACUTE ISCHEMIC BRAIN DAMAGE ASSOCIATED WITH CARDIAC FIBRILLATION

https://doi.org/10.51523/2708-6011.2018-15-1-7

Abstract

Objective: to perform the comparative analysis of the parameters of the autonomic nervous system (ANS) in patients with ischemic forms of brain damage that are associated with atrial fibrillation. Methods. 19 patients with transient ischemic attack (TIA), 9 with lacunar stroke (LI), and 10 volunteers were examined. In addition to the tests stipulated by the existing treatment protocols, all the patients were done testing of the parameters of heart rate variability (HRV) including the standard deviation of consecutive RR intervals (SDNN), percentage of the number of pairs of consecutive RR-intervals differing by more than 50 ms during the recording period (pNN50), mode of intervals RR (Mo), amplitude of the mode (AMo), on the basis of which the stress index (IN), the reactivity coefficient were calculated. Correlation, linear, and regression analyses were performed among some HRV parameters. The effect on the form of cerebral ischemia was determined by means of nonlinear regression analysis. Results. The patients with TIA revealed differences in the ANS functioning which are associated withcardiac rhythm disturbances in the form of a significant increase in heart rate variability (SDNN1 (p = 0.05) preserved after the stress test (SDNN2, p = 0.036) due to the increased influence of the parasympathetic part of the ANS activity (ΔX2, p <0.001). The influence of the autonomic part of the ANS in the TIA patients exceeded that of the LI group: at rest (pNN501, p = 0.046) and after orthostasis (pNN502, p = 0.008). The stress index in the TIA patients was the lowest and tended to differ from the control one (IN1, p = 0.082). SDNN (r = 0.57, p = 0.02), pNN50 (r = 0.6, p = 0.02), and ΔX (r = 0.59, p = 0.021) were found to cause a negative effect on the severity of face asymmetry in the TIA patients and on the sympathetic stress index (IN, r = -0.59, p = 0.021). The group of the patients with TIA in combination with atrial fibrillation revealed no significant AMO/Mo dependence, but a sanogenetic feature was determined in the form of a negative influence of Mo on the activity of the parasympathetic part of the ANS (ΔX/Mo, p = 0.015). There is no reliable relation between AMO/Mo and ΔX/Mo for the LI patients. The factor causing a transient form of cerebral circulation or LI was ΔX2 after an orthostatic test (OR = 131.6, χ2 = 4.7, p = 0.031). Conclusion. The patients with TIA associated with atrial fibrillation in contrast to the general TIA group revealed prevalence of the activity of the parasympathetic part of the ANS with the preservation of the sanogenetic reserve in the form of a negative dependence of parasympatheticotonya on the growth of humoral influence. The latter fact caused an increase in the activity of the autonomous part of the ANS in response to the stress and determined the dilemma of the formation of a brain necrosis focus.

About the Author

N. V. Galinovskaya
Gomel State Medical University
Belarus


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For citations:


Galinovskaya N.V. THE COMPARATIVE ANALYSIS OF THE VEGETATIVE STATUSIN PATIENTS WITH DIFFERENT FORMS OF ACUTE ISCHEMIC BRAIN DAMAGE ASSOCIATED WITH CARDIAC FIBRILLATION. Health and Ecology Issues. 2018;(1):42-50. (In Russ.) https://doi.org/10.51523/2708-6011.2018-15-1-7

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