State Institution "Kundiiev Institute of Occupational Health of the National Academy of Medical Sciences of Ukraine", Kyiv
Introduction. The occupational activity of the mine rescuers is connected with specific working conditions, which are characterized by implementation of especially hard and intensive work, under the combined effect of dangerous factors of emergency situations. In addition, the work in the guard mode in conditions of constant waiting for a signal "alarm" is accompanied by the increase in the level of the nervous-emotional stress, the need for rapid changing one type of activity to another, which creates an additional strain in the cardiovascular and blood circulation systems. For Ukrainian mine rescuers, the method of monitoring blood pressure and heart rate has not been used until recently.
The purpose of the study is to estimate the functional state of the cardiovascular system by the method of monitoring blood pressure and heart rate in workers of the government military mine-rescue (emergency rescue) services in the guard mode. Materials and methods of research. The research was related to studying the functioning of the cardiovascular system in workers of the government military mine-rescue (emergency rescue) services. 35 persons were examined in the mode of 12-hour day and night shifts by monitoring the blood pressure and heart rate with the device VAT42-2 (ICS-Techno, Ukraine) with the interval of measuring indicators every 30 minutes within a shift.
Results. A persistent increase in mean arterial blood pressure and pulse to the upper limit of the norml was observed during a shift. The individual maximum values of the systolic pressure achieved 239 mm Hg, diastolic – 163 mm Hg, heart rate – 219 bpm, and the minimum values were fixed at the level of 86 mm Hg, 38 mm Hg, and 36 bpm, respectively. Also, there was recorded the increase in the rate of diastolic pressure in the morning by 19,2 mm Hg / hr of the physiological norm of 6 mm Hg / hr, systolic – 14,7 mm Hg / hr of the norm – 10 mm Hg / hr.
Conclusions. In the investigated mine rescuers during day and night 12-hour shifts there was observed the state of the significant strain of the regulatory mechanisms in the cardiovascular system as a steady increase of systolic and diastolic pressure and the heart rate to the upper limit of the norm. In night shift workers there have been recorded significant deviations of the blood pressure values from the norm as an increase in the rate of systolic morning rise by a factor of 1,5, and diastolic pressure - more than 3-fold, which could further result in irreversible pathological changes. The recording of individual indices of arterial pressure and heart rate in mine rescuers will make it possible to pay attention to initial manifestations of pre-pathological states of the cardiovascular system which is important for preventing the development of vascular disorders.
Key words: mine rescuers, cardiovascular system, monitoring of blood pressure
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