[Method of assessing the functional state of the human body]

The article demonstrates an algorithm to evaluate functional state of operators exposed to ecologic hazards. The evaluation of the functional state includes analysis of the heart rhythm registered for 2 minutes. The functional state is assessed through an Indicator of Regulatory Systems Activity (IRSA), obtained by summation of all the values in modulus. IRSA values define 5 functional states: norm; functional strain moderate, marked and extreme; asthenia of regulatory systems. The algorithm suggested differs from the known ones in some features as follows. The diagnosis of heterotopic arrhythmia serves for more precise code demonstrating the heart automatism; formed on the basis of variation coefficient, the code demonstrating stability of the regulation proves the status of stable or disordered regulation; the code demonstrating activities of subcortical neural centers is formed on the basis of measured relative capacity of primary and secondary respiratory waves.