Ischemic heart disease claims the lives of 20% of Bulgarians. A study was done to learn more about if and to what extent ischemia disease mortality in Bulgaria is linked to external factors, particularly corpuscular sun radiation.
Materials and Methods: The Bulgarian National Statistical Institute provided data on ischemic heart disease mortality. The NOAA website provided data on solar corpuscular radiation. The data was processed using correlation and regression analysis.
Results: The annual figure I20 to I25, according to the International Classification of Disease 10th Revision, forms a high statistically significant correlation of the protons with energy above 1 MeV and alpha parts with energy between 4 to 10 MeV on the one hand, as well as the mortality of both males and females with ischemic disorders in bulgaria. The highest correlation coefficient was the dependence of female ischemic heart disease on the alpha particle flux: 0.939, a statistical significance level of 0,001. In Bulgaria the mortality from ischemic disease is negatively linked to the horizontal component of the geomagnetic field in Bulgaria (for male mortality, the correlation coefficient is -0.888, the level of statistical significance 0.001). In Bulgaria, on the one hand, the average number of annual sunflakes, and x-ray radiation (0.1 – 0.8nm) of the geostationary orbit, on the other hand, is not statistically significantly correlated. In the case of Galactic cosmic radiation and death from ischemic heart disease in Bulgaria, no statistically significant correlation exists. Examples are provided for a date interval correlated with intensive proton flow and ischemic mortality.
Discussion: Results show that an unknown phenomenon exists – a causal link between mortality from ischemic cardiovascular diseases in both Bulgaria and solar corpuscular radiation fluxes. This phenomenon contributes about 6 to 10 percent to Bulgaria’s mortality risk from ischemical heart disease. In other small, mid-latitude countries, this phenomenon can also be seen. The phenomenon appears during the day, particularly if the sun is at its climax, especially during the warm part of the year, when more people are outside without buildings being protected.
Author (s) Details
Department of Biochemistry, Microbiology and Physics, Trakia University, Bulgaria.
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