Abstract
Objectives: Acute coronary syndrome as an acute oxygenated blood deprivation to the heart muscle due to atherosclerotic plaque rupture in the coronary artery followed by thrombosis is possibly associated with changes in the Earth’s local time varying magnetic field as they strongly influence hormonal and other regulatory systems’ activity. This study analyses the correlation between prevalence of the acute coronary syndrome and the changes in the local time varying aspects of the magnetic field. Methods: Seven-hundred patients admitted to Cardiology Department of Hospital of Lithuanian University of Health Sciences Kaunas Clinics within 2016 due to acute coronary syndrome were retrospectively included into the study. The number of cases per week was compared with the weekly changes of the local Earth magnetic field. The one-year period was divided into two periods: the first-half of the year (weeks 1 to 26) and the second-half of the year (weeks 27 to 52) and more detailed analyses were performed accordingly to the significance of the left main artery lesion. Mean power of local magnetic field fluctuations in Lithuania, measured in pT2 in five different frequency ranges where overlaps between the Schumann resonance and EEG frequency ranges (named as SDelta (0-3.5 Hz), STheta (3.5-7 Hz), SAlpha (7-15 Hz), SBeta (15-32 Hz) and SGamma (32-66 Hz) to distinguish them from the EEG bands). Results: Statistically significant weak and moderate correlations between weekly prevalence of acute coronary syndrome admissions and the magnetic field intensities changes were found. Higher intensities in the SBeta and SGamma ranges were associated with a higher number of admissions throughout the year in females and the SGamma range was associated with higher number of admission only during the second-half of the year in males. A higher intensity magnetic field in SDelta, STheta, SAlpha and SBeta ranges was associated with a higher admissions number due to left main artery lesions in males, while a higher intensity in the SGamma range was associated with higher number of admissions due to left main artery lesions in females through the year. Conclusion: Significant correlation between acute coronary syndrome and changes in the local Earth time varying magnetic field intensities was found. Some frequency ranges are associated with an episode of an acute coronary syndrome. Left main artery lesions significantly correlated with magnetic field changes in most of the frequency ranges in males while only one of the frequency ranges in females.
Highlights
Acute coronary syndrome (ACS) as an acute oxygenated blood deprivation to the heart muscle due to mainly atherosclerotic plaque rupture in the coronary artery (CA) followed by thrombosis [1, 2] is one of the leading cardiac cause of hospital admission worldwide
In the analyses of the whole year model two positive weak and moderate correlation coefficients in (SBeta) [15; 32] (r = 0.06, p = 0.65) and (SGamma) [32; 65] (r = 0.27, p = 0.05) ranges were found in the female group, respectively. This means that a higher time varying magnetic field (TVMF) in SBeta and SGamma ranges is associated with higher number of ACS cases through the year in females
2) The acute coronary syndrome is positively correlated with the local Earth magnetic field in SGamma range in female through the year
Summary
Acute coronary syndrome (ACS) as an acute oxygenated blood deprivation to the heart muscle due to mainly atherosclerotic plaque rupture in the coronary artery (CA) followed by thrombosis [1, 2] is one of the leading cardiac cause of hospital admission worldwide. Recent studies have indicated that human hormonal regulation differs in the first and the second half of the year which are correlated with changes in the time varying local Earth magnetic field strength (Fig. 1) [3]. To understand the process more completely, it is necessary to focus on possible changes of cellular and molecular regulation in accordance to local Earth time varying magnetic field (TVMF) strength changes. Several laboratory studies have demonstrated significant negative correlations between baroreflex sensitivity and MF changes [9]. The reduction of baroreflex sensitivity may lead to higher mortality after ACS episode [10]. The correlations between strong TVMF and melatonin level reduction have been demonstrated [11, 12] It is already known, that higher level of melatonin is associated with better myocardial microcirculation [13]
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