Characteristics of individual reactions of the cardiovascular system of healthy people to changes in meteorological factors in a wide temperature range
Based on the results of 4-year observations of daily variations in blood pressure (BP) and heart rate (HR) in seven healthy volunteers, two distinct types of reaction of physiological indicators (PIs) to changes in meteorological parameters (first and foremost, atmospheric temperature T
 atm) are revealed. The first type is a monotonic (but nonuniform with respect to speed) decrease in systolic BP with increasing temperature, which is most pronounced for T
 atm < −5°C and T
 atm > 15°C, with a weaker reaction of diastolic BP and no reaction of HR (in four volunteers). The second type is a two-phase nonmonotonic dependence of BP indicators on T
 atm, which coincides with the first type in the range T
 atm < −5°C and is characterized by a positive correlation of BP and HR indicators with T
 atm for T
 atm > −5°C (in two volunteers). The physiological mechanisms that can provide the observed compensatory-adaptive reactions of healthy individuals to atmospheric factors in different temperature ranges are analyzed in detail. It has been shown that the revealed regularities can explain the results obtained by the authors in earlier studies.