[INDICATORS OF CARDIOHEMODYNAMICS OF RHYTHM DISTURBANCES IN ELDERLY PEOPLE WITH CHRONIC HEART FAILURE].

The aim of our study was to study and analyze the electrophysiological indicators of rhythm disturbances in heart failure in elderly people who participated in the elimination of the consequences of the Chernobyl accident in the distant period. In order to assess the functional features, 50 elderly patients (65-74 years old) who participated in the liquidation of the consequences of the Chernobyl accident were examined. Patients were divided into 4 groups depending on the length of stay in an environmentally disadvantaged zone: group 1 (April-June 1986) - 8 (16%) people; 2 (June-December 1986) -14 (28%); 3 (1987-1989) -17 (34%) and group 4 (1990-91gg) -11 (22%) people. All patients were on basic therapy. To study cardiogemodynamics in this category of patients, the following electrophysiological research methods were performed: ECG, XM ECG, SMAD, EchoCG. When analyzing electrophysiological studies, the MSExcel and Statistica programs were used. The examined patients showed a high incidence of left ventricular hypertrophy and cardiac arrhythmias. So in the 1st and 2nd groups, atrial fibrillation, sinus tachy and bradycardia, AV blockade of 1-2 degrees were reliably detected. In groups 3 and 4, left ventricular hypertrophy and arrhythmias were detected with a lower frequency. It should be noted that these changes were observed in individuals participating in the LPA from April to December 1986, i.e. in the first year after the accident. According to echocardiography, diastolic dysfunction of the left ventricle was found mainly in individuals of 1-2 groups. High high indices of KDR, BWW and KSO in 1-2 groups are noted. LVMI exceeds its norm in all studied groups. Thus, statistically significant differences of some indicators are revealed with electrophysiological research methods in all groups of elderly patients with heart failure participating in the liquidation of the Chernobyl accident, as well as the high incidence of rhythm disturbances in patients with Chernobyl nuclear power plants.

[ARTERIAL HYPERTENSION AMONG WORKERS OF A URANIUM PROCESSING ENTERPRISE OF THE REPUBLIC OF KAZAKHSTAN: PREVALENCE, RELATIVE RISKS AND PREDICTORS OF THE DEVELOPMENT].

The aim of this study was to establish the prevalence, relative risks, and predictive factors of the development of arterial hypertension (AH) in workers of a uranium processing enterprise (UPE). An open cross-sectional comparative study of 809 UPE workers was conducted. The compared them to the 696 workers of the bearing plant, located at a distance of 10 km from UPE. Stratification was performed and odds ratios (OR), gross (RR) and standardized relative (SRR) risks of hypertension were calculated. Our results revealed a high prevalence of hypertension among UPE workers (24.8%), as well as greater risk of development of hypertension among workers of UPE in comparison to the personnel of the non-uranium enterprise: RR=2.4 and SRR=2.9. The most significant predictors of hypertension were burdened heredity (OR = 13.6), total radiation dose (OR=1.5), overweight (OR=1.1), high anxiety (OR=0.5) and systematic use of alcohol (OR=0.5). Thus, among workers chronically exposed to radiation toxicity, high prevalence of hypertension, excessive RR and SRR of developing hypertension and the presence of risk factors for hypertension were established.