[Cardiovascular function dynamics in healthy Kazakhstan participants of an ecomedical investigation working in extreme conditions (emergency management personnel)].

Purpose of the investigation was to study group dynamics of seasonal changes in the autonomous nervous and cardiovascular functions in essentially healthy males occupationally dealing with stressful situations (field personnel and firefighters of the Alma Ata Emergency Management Department (Kazakhstan). The investigation was based at the Kazakh National Medical University (Alma Ata) and conducted in conjunction and parallel with the MARS-500 project. Methodology embodied the pre-nosology approach pointed at identification of states in-between the norm and pathology. Results of the year-long investigation demonstrated seasonal variations in the functioning of normal organism that could be associated with occupational factors and "arduous duty", as it follows from the EMD operations summary (autonomous balance shifting toward prevalence of the sympathetic control due to the spring and summer "arduous duties" and the parasympathetic control in the peaceful situation during wintertime). These observations testify to the importance of dynamic health monitoring of normal people occupationally exposed to chronic psycho-emotional strain for pre-nosology diagnosis and timely preventive intervention.