| Abstract: | It is shown that miners engaged in deep coal mines develop myocardial infarction (MI) at a young age, the mean age being 42.8 years. The foregoing clinical picture was characterized by an atypical, painless course. In some cases (20 percent) the typical pain syndrome did not manifest itself even in the preinfarction period making the diagnosis difficult. MI develops under the conditions of relatively preserved coronary reserves (functional class I-II). The leading factors that promote IM development are intense hard physical work combined with a heating microclimate. This is evidenced by the high rate of its occurrence during work and the first 1 to 4 hours after work (74.2 percent), large zones of affection (large-focal and transmural infarctions), and by the development of disorders in cardiac rhythm and conduction. The low percentage of persons registered at the health centers before MI development, and late hospitalization indicate the necessity of improving the system of the treatment and prevention of diseases among the group of patients under consideration. |
