THE INFLUENCE OF SEASONS ON THE DEVELOPMENT OF EXACERBATIONS OF THE MOST COMMON DISEASES OF THE CIRCULATORY SYSTEM. GENDER AND AGE PECULIARITIES

Abstract

Introduction. The aim of the study was to assess seasonal differences in the exacerbations rate of diseases of the circulatory system (DCS), taking into account the nosological form (ICD code), gender and age of patients. Material and methods. 428 727 emergency medical service (EMS) calls to patients with exacerbations of DCS in Yaroslavl for the period 2012-2017 were analyzed. The EMS calls to men and women were analyzed separately. Four groups were identified: AH (arterial hypertension), CHD (coronary heart disease), RD (rhythm disturbance), CVD (cerebrovascular disease), which were divided into age subgroups. To assess the impact of the seasons of the year, the subgroups “winter” (all emergency calls in the winter period (from December to February) and “summer” (all emergency calls in the summer period (from June to August) were additionally identified. Results. The calls due to an elevated arterial blood pressure were most frequent among all the EMS calls from DCS patients. Among them, in all age subgroups older than 40, there were significantly more calls from women, while the calls for exacerbation of other DCS were significantly higher from men. In winter, the number of EMS calls for arterial hypertension was significantly higher than in summer in all age subgroups of men and women older than 40 years. For other analyzed DCS, such regularities were not detected. Conclusion. The patterns revealed in this study should be taken into account both in clinical and preventive practice, and in the organization of work of emergency medical service.