Relevance. Platelet activation and platelet aggregation are central processes in the pathophysiology of coronary heart disease and thrombosis. The relationship between cardiovascular morbidity and mortality varies with the presence of other concomitant cardiovascular risk factors. Objective. To determine the state of platelet hemostasis in patients with essential hypertension (HT), with concomitant non-alcoholic fatty liver disease (NAFLD). Materials and methods. 152 patients were examined: 72

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... en and 80 women. Three groups were identified: I - 46 patients with stage II HT without concomitant NAFLD, II - 54 patients with NAFLD without HT, group III - 52 patients with HT and concomitant NAFLD. A study of total platelet count, mean platelet volume (MPV), platelet distribution width (PDW), platelet count (PCT) and spontaneous platelet aggregation was performed. Results. The level of mean platelet volume (MPV) in both groups of patients with hepatic steatosis exceeded control values equally - by 6%, both in patients with NAFLD (p<0.001) and in NAFLD with concomitant hypertension (p<0.01). In patients of the NAFLD group and hypertension, the relative width of the platelet distribution by volume (PDW) had high values - 2% (p<0.05) higher than in the control cohort, and 2.4% (p<0.05) than in patients with isolated HT. An increase in the degree of spontaneous aggregation in patients of all surveyed groups compared to controls. So in patients with HT II stage. spontaneous aggregation increased 2.2 times (p<0.001), while in both groups of patients with hepatic steatosis, the increase in spontaneous platelet activity was twice as high: in patients with NAFLD - 4.3 times (p<0.001), in patients with HT II stage. and concomitant NAFLD - 4.1 times (p<0.001). Conclusion. NAFLD is accompanied by an increased in MPV, the size of which correlates with their functional activity. In patients with isolated NAFLD, a statistically significant increase in spontaneous platelet aggregation is also observed, which allows considering NAFLD as one of the risk factors for thrombophilic changes in the primary hemostasis.