[The effect of noise and vibration on the cardiovascular system in exposed workers and possibilities of preventing their harmful effects].

We examined the state of blood pressure, peripheral arterial circulation and changes of polycardiogram before and after three hour work of 160 workers professionally exposed to noise and vibrations. They were divided into two sub-groups regarding physical recreational activity (walking, swimming or running), with the average load level from 60% to 80% of maximal oxygen consumption. 85 workers made up the control group. They were not exposed to noise and vibrations at work. The gathered results show that the prevalence of the arterial hypertension and obliterating endarteritis is statistically significantly higher in the group of workers exposed to noise and vibrations and that these professional damages cause important hemodynamic changes of cardiovascular system, but also that permanent physical recreational activity (swimming, running or walking) can prevent such effects.