Chronic pneumonia was modelled on rabbits after Zakharyevskaya-Anichkov method in authors own modification. The treatment was performed in the karst cave. Unlike to control animals normalization of present alterations in left ventricle myocardium was observed in experimental rabbits, regimen and duration of stay in the cave being of great importance, e. g. animals kept in the cave uninterruptedly for 22 d displayed almost complete normalization of both myocardium with its vessels and a series of immunological and biochemical parameters.
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