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[The use of low-intensity laser irradiation of the blood in myocardial infarction].

A total of 119 patients with myocardial infarction hospitalized within 24 hrs from the disease onset were examined. He-Ne laser irradiation of the blood (daily 40 min sessions for 3-5 days) was carried out in 45 patients (Group 1). The rest 74 patients (Group 2) were administered common therapy. A number of biologically active substances were radioimmunoassayed in the blood of 12 Group 1 and 11 Group 2 patients on days 1, 3, and 7 of the disease. The pain syndrome was alleviated in Group 1 patients, in contrast to Group 2 patients, and the frequencies of ventricular arrhythmias, of heart failures, and of the condition recurrences were reduced, as was the mortality rate. Laser therapy resulted in reduction of the activities of the hypophyseoadrenocortical and aldosteron-renin-angiotensin systems. Besides blood levels of dilatants and proaggregants (PGF2 alpha, vasopressin, angiotensin II) reduced in these patients, whereas vasodilating and antiaggregation hormones (PGE, PGI2) levels increased and the PGI2/TxB2 ratio improved.