Angina pectoris is a chronic disabling heart disease that leads to myocardial infarction and death without proper treatment. Aim - to study the dynamics of frequency of ambulance сalls for patients with stable angina in different seasons of the year, depending on the current meteorological factors.Materials and methods. 1034 cases of calls of the emergency medical service in the city of Vladikavkaz to the patients with angina attack were analyzed. Based on the seasonal ranking of the ambulance frequency calls and the corresponding base of meteorological parameters, a correlation analysis of the relationship between these indicators was made. Results. It has been established that the seasonality factor influences the frequency of calls to the ambulance (2=9.12; KW-H=8.92). Correlations between the frequency of calls to the ambulance and meteorological factors are seasonally specific and vary with respect to annual coefficients. The most significant contribution to the increase in the incidence of angina attacks is made by the factors: average daily air temperature, inter - day variability of atmospheric pressure, relative humidity, cloudiness, pathogen indices of these factors, as well as a general index of weather pathogenicity.Conclusion. In winter, due to the negative impact of low temperatures and sharp variations in the whole complex of meteorological factors, the maximum number of ambulance calls to patients with angina is recorded. The most favorable period for patients suffering from angina pectoris is the summer season, during which emergency medical care is minimal.
Students who attend a medical HEE often face strain in their adaptation mechanisms when preparing for exams; it can create substantial preconditions for functional deregulation in body systems. The articles outlines some results obtained via examining heart rate variability (HRV) in students of the 2nd and the 3rd year attending the North Ossetia State Medical Academy who had different metabolic status in a period prior to exams. Our research goal was to assess the state of the vegetative nervous system and regulatory systems in students with different metabolic status (BMI< 25; BMI=25–29.99; BMI=30–34.99.) who had to face excess stress during preparation to exams. Heart rate intervals were registered during five minutes in an examined person being at rest. HRV parameters were analyzed in time and frequency domains. We revealed that medical students had elevated activity of the sympathetic section in their vegetative nervous system (VNS) during a period prior to exams; in particular, it was apparent for the regulation system of the vasomotor center (PLF = 48.4%). Students’ bodies had apparent strain in their regulatory systems (SI=177.5 a.u.). Total activity of the regulatory system was significantly elevated (TP=2,293 msec2) due to central regulation levels. As students’ BMI grew, there was a decrease in activity of the parasympathetic component in vegetative regulation and heart rate management became more centralized (IC=3.2–4.5 a.u.). Students with Class 3 obesity had the maximum spectrum power of the superlow component in heart rate variability (PVLF=29.3%). HRV parameters analysis allows estimating whether adaptation processes in students’ bodies are adequate during preparation to exams; it can be done in screening mode and provides an opportunity to perform timely prevention activities.
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