[The seasonality of disease exacerbation studied for the planning of chronoprophylaxis].
The author summarizes results of a biorhythmological analysis of the frequency of exacerbations of main diseases of the gastrointestinal tract and cardiovascular system. A seasonal character was established for some of these diseases--gastric and duodenal ulcer, chronic gastritis, ischemic heart disease, arterial hypertension, neurocirculatory dystonia of the hypertensive type. It is recommended to use these results for chronoprophylaxis of the mentioned pathological conditions.