A comprehensive analysis of incidence of myocardial infarction in Vladikavkaz depending on solar and geomagnetic activity
Botoeva, N.K.; Khetarugova, l.G.; Rapoport, S.I.
Klinicheskaia Meditsina 91(10): 28-34
2013
ISSN/ISBN: 0023-2149 PMID: 25696947 Document Number: 666350
The data on myocardial infarction morbidity in Vladikavkaz for 2007-2010 were analysed with reference to solar and geomagnetic activity. Time series of morbidity in men and women were constructed and their seasonal constituent was distinguished. It was found that the number of myocardial infarctions increases on day with enhanced geomagnetic activity especially among subjects aged 50-69 years. Regression analysis of the relationship between the number of sunspots and myocardial infarctions yielded the equation of piecewise linear regression showing that 42% of the cases were due to the changes in the number of sunspots. Medium strength negative correlation was found between the number of myocardial infarctions and the recurrence index of Bz-component of the interplanetary magnetic field. It suggests an important role of chaotic dynamics of external factors in the development of myocardial infarction.