To reduce the cost of obtaining bacterial cellulose, acidic by-products of the alcohol and dairy industries were used without any pretreatment or addition of other nitrogen sources. Studies have shown that the greatest accumulation of bacterial cellulose (6.19g/L) occurs on wheat thin stillage for 3 days of cultivation under dynamic conditions, which is almost 3 times higher than on standard Hestrin and Schramm medium (2.14g/L). The use of whey as a nutrient medium makes it possible to obtain 5.45g/L bacterial cellulose under similar conditions of cultivation. It is established that the pH of the medium during the growth of Gluconacetobacter sucrofermentans B-11267 depends on the feedstock used and its initial value. By culturing the bacterium on thin stillage and whey, there is a decrease in the acidity of the waste. It is shown that the infrared spectra of bacterial cellulose obtained in a variety of environments have a similar character, but we found differences in the micromorphology and crystallinity of the resulting biopolymer.

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Aim.To analyze the results of 5-year follow-up of the paroxysmal atrial fibrillation patients (PAF) taking antiarrhythmic therapy (AAT)Material and methods.Patients (n=500) were selected to 11 groups: I — healthy, II — controls, III-XI — PAF taking AAT. The baseline parameters of heart rate variability (HRV) were assessed during 5-year follow-up.Results.Decrease of SDNN does 1,9 times increase the risk of AF development during the first 3 months from preventive AAT start. Decrease of RMSSD does 3,9 times increase the risk of AF during the first 2 weeks, and 1,9 times — 3 months; decrease of Delta X increases the risk of AF 3,9 times during 2 weeks, 2 times — during 3 months, 1,4 times — during 6 months, 1,3 times — during 12 months and 3 years. Increase of Amo does 1,8 times increase the risk of AF during first 3 months. If there was baseline decrease of Delta X and RMSSD, then within 2 weeks the AF paroxysm developed in 7,9% patients, and in 3 months — 15,9% patients. With the decrease of Delta X and RMSSD, in combination with low SDNN, the probability of sinus rhythm retention during 1 year is 51,2%.Conclusion.PAF patients taking preventive AAT demand for ECG assessment of HRV parameters no less than once per 3 months.

Introduction. Cardiovascular diseases are the leading cause of morbidity and mortality worldwide, with heart rhythm disorders accounting for a significant proportion of them. Atrial fibrillation (AF) is an arrhythmia that poses a risk of thromboembolic complications and is difficult to treat with ongoing preventive anticoagulant therapy. Aim of the study. To analyze the prescription of anticoagulant therapy to patients with AF on the regional level. Methods and results. The study included 72 patients with the nonvalvular form of AF (from 41 to 82 years old) of the Department of Rhythm and Conductivity Abnormalities of the State Budgetary Institution of the Republic of Mordovia RCH № 4 for 2019. Three groups were singled out depending on the AF form: the first one – patients with the constant form (n = 22), the second one (n = 24) – with the persistent form, the third one (n = 24) – with the paroxysmal form. The risk of thromboembolic complications was assessed using the CHA2DS2-VASc scale and hemorrhagic complications using the HAS-BLED scale. All patients had a high risk of thromboembolism (index above 2 points), which reflects multiple risk factors and indicates the need for oral anticoagulants (OAC). According to HAS-BLED scale calculations, the risk of haemorrhagic complications was low in most patients (2 or less points) – there was no significant increase in the risk of bleeding, but careful monitoring is required. Analysis of the results revealed that only 54% of patients took OAC, despite the fact that all patients were shown anticoagulant therapy. When analyzing the cases of patients who did not take anticoagulants, it was found that 23% of patients, despite the doctor’s recommendations, refused to take the drugs, 47% of patients justified the inability to control IHR and 30% were unable to purchase expensive new OAC. Conclusion. Despite the recommendations for the management of patients with atrial fibrillation, only 54% were prescribed oral anticoagulants.

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