Investigation of the Effect of Ambient Temperature and Geomagnetic Activity on the Vascular Parameters of Healthy Volunteers

Abstract

Aim of this paper is to reveal whether the geomagnetic activity (GMA) and meteorological factors (MFs) affect vascular parameters of healthy volunteers. As a trial study we used new device "Tonocard," and new vascular parameters for study-a pulse wave velocity (PWV) and an endothelial function (EnF) in addition to blood pressure measurements. These parameters never investigated before in such aspects. As far as novelty of device itself and investigated parameters we limited ourselves by monitoring only four healthy volunteers (without cardiovascular pathology). To analyze the sensitivity of their aforementioned medical indices to GMA and MFs two independent mathematical approaches were used, one of whom is based on traditional methods of mathematical statistics and the other on the theory of pattern recognition Dependence of physiological characteristics on the atmospheric temperature, revealed by both applied mathematical approaches, showed complex non-linear character of biological replies: the reaction has a different form in different temperature ranges and is manifested in the form of synchronization of slow variations of physiological and atmospheric parameters (trends) with a period of several days, while the daily variations were virtually independent. The systolic blood pressure (SBP), PWV and a difference between two specially selected values of PWV (DPWV) are approximately equally depending on atmospheric temperature, which accounts for an average of 26% to 28% of their variations. Sensitivity to the GMA for this test was found only for PWV.

Cardiovascular System Interactions With The Local Earth Magnetic Field Fluctuations: A Cohort Study

“…This is the rst study we are aware of that focused on the correlations between cardiovascular function and changes in LMF strength in different frequency ranges and at different fractal levels. Moreover, there are only a few publications on changes in the local MF impact on human health [25,[23][24][25][26][27][28][29], while many publications analyse the impact of the disturbances in the Global MF on living organisms.…”

“…It is known that not only enhancement but also weakening of the resonant frequencies in the magnetic eld can adversely affect the body and that the direction of the LMF intensity change has an impact [21]. Clearly, increased LMF activity in low frequency ranges has a positive effect on the course of ischemic heart disease (IHD) [21,[23][24][25][26][27][28][29] but may increase risk of acute arrhythmias [25]. This study has con rmed that higher LMF intensity in the high frequency ranges is associated with higher number of admissions due to ACS.…”

“…Geomagnetic climate changes undoubtedly affect living organisms [1][2][3][4][5][6][7][8]. It was noticed that birds, sh, and insects navigate in the environment mainly by Earth geomagnetic eld oscillations [1].…”

“…It was noticed that birds, sh, and insects navigate in the environment mainly by Earth geomagnetic eld oscillations [1]. Interestingly, geomagnetic eld (GMF) impact on the tone of the vascular wall has been repeatedly proved, [2][3][4][5][6][7][8] highlighting that GMF changes independently to other geomagnetic climate factors strongly modulate blood pressure (BP) changes [2]. Even more, it was noticed that geomagnetic storms (GMS) created by solar ares [2] misbalancing adaptive mechanisms and causing severe adaptive stress responses most heavily impact cardiovascular system regulation mechanisms [9,10] manifesting as decrease of the heart rate variability (HRV) and blood ow, and increase in platelet aggregation activity, coagulation, and blood viscosity even in healthy people [9].…”

“…Interestingly, a stronger negative effect of the local Earth magnetic eld (LMF) on onsets of acute atrial brillation (AAF) has been observed in hypertensive patients [25][26][27]. LMF strength uctuations resulting in HRV reduction and heart rate (HR) increase may provoke heart arrhythmias [28].…”