[The autonomic regulation of the cardiovascular system in subjects with the autonomic dystonia syndrome subjected to ionizing radiation exposure as a result of the accident at the Chernobyl Atomic Electric Power Station]. / Sostoianie vegetativnoi reguliatsii serdechno-sosudistoi sistemy u lits s sindromom vegetativnoi distonii, podvergshikhsia vozdeistviiu ioniziruiushchego izlucheniia v rezul'tate avarii na Chernobyl'skoi AES.

180 males in the age of 21-50, all the participants of Chernobyl accident consequences liquidation were examined. In all individuals vegetative dystonia (VD) syndrome was diagnosed (total radiation doses 0.1-1.0 Grey according to D. Erwin method). It was established that VD syndrome differed in these persons by pronounced stages of disorders manifestation as well as by polymorphism of vegetative disturbances. These findings testify central and peripheral vegetative nervous system parts involvement. In 40.2% of cases in individuals which were examined in rest and in 56.2% after dosed physical loading the functional disorders of vegetative cardiovascular system regulation of vagal type mainly (76.5%) were revealed. Clear correlation was not observed between vegetative disorders and radiation dose value. The estimation of contribution of each of the possible pathogenic factors (exactly stressogenic, radioactive and others) in vegetative disturbances development is not possible now.

[Characteristics of functional tests with isometric loads used in the diagnosis of ischemic heart disease]. / Kharakteristika funktsional'nykh prob s izometricheskimi nagruzkami, ispol'zuemykh v diagnostike ishemicheskoi bolezni serdtsa.

Cardiovascular response to isometric stress (IS) applied to the upper and the lower extremities, and general isometric stress amounting to 30% of the maximum productive force (MPF) were compared in 50 normal subjects and 60 coronary patients. Hemodynamic values were significantly higher at 30% MPF general isometric stress tolerance threshold, as compared to those seen in the last minute of the maintenance of IS of the same force by the upper extremities. Hemodynamic responses to IS, applied to the lower extremities, and to general 30% MPF isometric stress were basically similar. The general 30% MPF isometric stress was more sensitive with respect to the diagnosis of coronary disease, while the test's specificity and predictive value were fairly high. The sensitivity of the lower-extremity IS test was somewhat lower, as compared to that of the general isometric stress test, yet it is much higher, as compared to the upper-extremity IS test, and can therefore be used in screening programs.