[Peculiarities of the development and clinical course of myocardial infarction depending on solar activity].
Klinicheskaia meditsina · 2008-01-01 · Registry study
Abstract
Analysis of 214,908 calls for ambulance demonstrated a significant (p = 0.95) rise in the frequency of acute myocardial infanction (AMI) in men in a year of low solar activity (LSA) and in women during a year with high solar activity (HSA). The increased incidence of sudden death, clinical death, cardiogenic shock, and pulmonary oedema was associated with HSA. The largest number of calls for AMI patients was recorded between 9.00 and 12.00, the lowest from 3.00 to 6.00. The frequency of AMI in the daytime was higher than at night. This difference was also apparent in "astronomic" seasons and half years with low and high solar activity. The incidence of AMI was highest during "astronomic" autumn and lowered in winter time. It was elevated in December of the LSA year and in May of the HSA year, in Mondays of HSA and Thursdays of LSA years. The minimal number of AMI episodes was recorded in weekends. Short daylight period and low air temperature combined with changes of atmospheric pressure and relative humidity during the cold period of the LSA year associated with a significant rise in the incidence of AIM. The overall frequency of AMI significantly increased during magnetic storms compared with the preceding days or immediately after them at both HSA and LSA. Mean daily frequency of AMI significantly increased within 24 hours before a magnetic storm only in the HAS year.