Abstract
Analysis of ambulance calls in Moscow during 1979–1981 reporting myocardial infarction (85 700 events), sudden death (71 700 events), and hypertension crises (165 500 events) shows the presence of clear seasonal variations with a deep summer minimum and a winter maximum. The same trend was upon analysis of monthly data on infarction mortality in Bulgaria over 15 years (1970–1985). One of the biotropic factors influencing the human cardiovascular system can be geomagnetic pulsations Pc1, agreeing in frequency with cardiac rhythms. In the seasonal trend, Pc1 have maximum intensity in winter. The comparison of data on ambulance calls in Moscow with the Pc1 observation data catalog revealed that, on ∼70% of days, an abnormally large number of myocardial infarction calls was accompanied by the presence of Pc1; their concurrence was half again the chance expectation. Besides, it was determined that the biotropic influence of magnetic storms in winter was much higher than in summer. One of the plausible reasons of the winter infarction maximum could be seasonal variations in the production of the pineal hormone melatonin, which destabilized the organism and increased its sensitivity to geomagnetic disturbances attended by Pc1.
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Original Russian Text © N.G. Kleimenova, O.V. Kozyreva, T.K. Breus, S.I. Rapoport, 2007, published in Biofizika, 2007, Vol. 52, No. 6, pp. 1112–1119.
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Kleimenova, N.G., Kozyreva, O.V., Breus, T.K. et al. Seasonal variations in myocardial infarctions and the possible biotropic influence of short-period geomagnetic pulsations on the human cardiovascular system. BIOPHYSICS 52, 625–631 (2007). https://doi.org/10.1134/S0006350907060152
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DOI: https://doi.org/10.1134/S0006350907060152