[The effect of elevated environmental temperature on the development of a potassium deficiency in the body].

Electron microscopy and roentgen microanalysis were used to study the ultrastructure and electrolytic balance of K+, Na+ and Cl- of the animal myocardial tissue during general body hyperthermia. It was established that long-term effect of heating microclimate causes a distinct reduction of K+ in the cardiomyocytes accompanied by essential changes of the ultrastructure of ischemic character.

[The temporary loss of work capacity in workers in the hot shops of the metallurgical industry due to diseases of the circulatory organs].

It was established that morbidity with temporary loss of working capacity due to diseases of the circulatory organs showed a tendency towards increase among workers of modern hot shops of the blast furnace, steel-smelting furnace, converter and the steel rolling industry. Most frequent in these category of workers was incidence of ischemic heart disease, hypertensive disease and hemorrhoid. The incidence varied among different professions enumerated above and depended also on the age, working conditions.

[Hemodynamics and mechanisms of the regulation of the cardiovascular system in workers in hot shops].

Furnace workers showed definite changes of indices of the central hemodynamics against the background of a pronounced "sympathetic alteration" in controlling the cardiac rhythm. These findings evidence significant increase of tension in the mechanisms of adaptation and development of premorbid states in workers with a 10-year length of work and over 40 years of age.

[Potassium deficiency in rat cardiomyocytes after whole-body hyperthermia].

Potassium distribution and content were studied in different compartments of rat heart papillary muscle by X-ray microanalysis. A higher concentration of potassium was measured in normal rat as compared to that in animals treated with high physiological temperature (45 degrees C), to be 120 and 80 mM, respectively.