Aim: to present current data about the frequency and risk factors of upper gastrointestinal complications associated with the use of nonsteroidal anti-inflammatory drugs (NSAIDs) and the possibilities of preventing these complications.Key points. The incidence of gastrointestinal complications associated with NSAIDs is 14.7–30.1 %, with the maximum risk noted in the first two weeks of their administration. The use of selective cyclooxygenase-2 inhibitors is associated with a reduced risk of gastrointestinal complications. All patients who are going to receive NSAIDs should be diagnosed with H. pylori and treated with eradication therapy if this infection is detected. Even in patients without risk factors for gastrointestinal complications and with short courses of therapy, coxibs or a combination of NSAIDs and proton pump inhibitors may be considered. Prevention of NSAID-associated lesions of the upper gastrointestinal tract is an indication for the appointment of omeprazole and esomeprazole in accordance with the instructions for medical use. Esomeprazole has a number of pharmacokinetic advantages — a large area under the pharmacokinetic curve, the ability to inhibit CYP4502C19, which determines the high efficiency of therapy in fast and ultrafast metabolizers. Previous clinical studies of esomeprazole for the prevention of NSAID-associated lesions of the upper gastrointestinal tract demonstrate high efficacy. In the randomized OBERON study the risk of gastric and duodenal ulcers after 3 months of low-dose acetylsalicylic acid treatment in the esomeprazole group was 7 times lower.Conclusion. Assessment of risk factors, correction of modifiable risk factors, selection of safer NSAIDs and simultaneous administration of proton pump inhibitors (including esomeprazole) are effective prevention of NSAID-associated upper gastrointestinal lesions.

BACKGROUND. The achievement and maintenance of euhydration are the key components of dialysis effectiveness, particularly in reducing the risk of cardiovascular events. Sodium loading during the session is one of causes of excessive sodium and water intake. THE AIM: was to evaluate the effectiveness and safety of an individualized approach to the prescription of dialysate sodium based on the serum sodium. PATIENTS AND METHODS. After retrospective analysis of previous serum sodium (1049 patients-months), interdialytic weight gain (IDWG), blood pressure(BP) and dialysate sodium(NaD), we prescribed the NaD at the sodium setpoint (n=45). RESULTS. The stability of predialysis serum sodium was high, and five monthly samples were sufficient to accurately assess the sodium setpoint. After six-month, there was a reduction in IDWG from 2.51±0.86 to 2.26±0.87 kg in the entire group (p=0.003), the result was achieved in both subgroups, with a decrease in NaD (2.63±0.81→2.37±0.82 kg; p=0.021), and with an increase in NaD (2.39±0.90→2.15±0.88 kg; p=0.049). Baseline IDWGs were higher in the first subgroup (p=0.041); but after NaD individualizing they were almost the same. Individualization of NaD was accompanied by a gradual reduction in systolic BP (-0.76±0.14 mmHg/month, p=0.005), but not diastolic BP (-0.13±0.13 mmol/l/month). After bidirectional change in NaD the dynamics of systolic BP didn`t differ between groups with a decrease or increase in NaD: (-0.80±0.13 vs. -0.72±0.11 mmHg/month; p=0.052). CONCLUSION. Individualization of dialysate sodium to set point leads to a decrease in IDWG and BP even while NaD increases, without increasing in the frequency of intradialysis hypotension. The effectiveness and safety of the approach require confirmation in large-scale interventional studies.

Aim: to provide the basic points of the Expert Panel of the Russian Gastroenterological Association with discussion of measures to improve diagnostics, treatment and management of chronic gastritis patients.Key points. In the Russian Federation in 2021 more than 30 million patients diagnosed with “Gastritis and duodenitis” were recorded (K29 in accordance with International Classification of Diseases-10). H. pylori incidence rate in the Russian population has reduced and presently is about 40 %. In chronic gastritis pattern H. pylori-associated gastritis has still dominated though gastritis percent after successful H. pylori eradication, reactive gastropathy (including reflux gastritis) and autoimmune gastritis, has increased. Endoscopic and histologic examinations serve as key diagnostic techniques that provide a means for assessing the ethiology of gastritis, topography and degree of atrophic changes, gastritis staging as per OLGA/OLGIM system that properly correlates with the risk of stomach cancer and determines endoscopic examination strategy. H. pylori eradication therapy of gastritis serves as an etiotropic treatment and makes it possible to prevent progression of atrophy and stomach cancer. Conventional triple therapy combined with bismuth tripotassium dicitrate allows for achieving optimal cure rates of H. pylori eradication. Addition of rebamipide to regimens of H. pylori eradication improves their efficiency. Rebamipide arrests symptoms of dyspepsia in the case of chronic gastritis and functional dyspepsia. The administration of rebamipide for chronic gastritis makes it possible to influence the syndrome of increased epithelial permeability and inflammation, which makes it advisable to study it as a means of preventing stomach cancer and the progression of atrophy in various types of chronic gastritis.Conclusion. Members of the Expert Panel has approved the algorithm of diagnosis and treatment of H. pylori-associated gastritis, gastritis after H. pylori eradication and H. pylori-negative gastritis at the diagnostic stage in the case of initial presentation and long-term follow-up when needed.

The guidelines describe the management of outpatient follow-up by a general practitioner of patients with esophageal diseases (esophagitis, gastroesophageal reflux disease, Barrett’s esophagus and achalasia cardia). The following is presented: an approximate scope and frequency of paraclinical investigations, information on the diagnosis, treatment and prevention of complications of diseases. The guidelines are intended for general practitioners, family doctors, as well as for mid-level health providers working with the above-mentioned doctors, for paramedics performing the doctor functions. The guidelines can be used by public health physicians, heads of primary health care facilities and their divisions.

Background. Classical nephroprotection reduces its effectiveness at the late CKD stages; the search for effective algorithms is hampered by accelerating decline in GFR, therefore there are no generally accepted ways to evaluate the effectiveness. Aim: to build a model for predicting the GFR decline rate in order to assess the effectiveness of the intensive follow-up. Methods. A representative group of regular follow-up (N=540) was allocated from the city database (N=7696) to built-up the polynomial model that predicts GFR annual decline. We used the model to evaluate the intensive monitoring effectiveness (N=100) by the difference between predicted and actual rates of GFR decline. We also selected well matched subgroup of 200 patients for direct comparison of hard and surrogate outcomes. Results. During last year before need in dialysis, the rate of GFR decline in intensive group was 5.981.69 vs. the predicted 9.060.59ml/min/1.73 m/year. We used that assessment of the intervention effectiveness as dependent variable in regression and categorical analysis. The significant components of the nephroprotection: phosphatemia decrease (0.25 mmol/l), hemoglobin increase (1 g/dl), effective administration of RAAS blockers (to reduce proteinuria by 0.1 g/l), systolic blood pressure decrease (5 mmHg), calcemia deviations decrease from the target (0.1 mmol/l), acidosis correction (2 mmol/l), inflammation reduction and albumin increase (1.5 g/l) -were associated with the smaller GFR decrease rate by 15%. In intensive group, the dialysis risk was 2.2 times lower, the death risk was 4 times. The only planned dialysis start was ensured in intensive group, 67% chose peritoneal dialysis. Conclusions. The prediction of GFR decline rate calculated by nonlinear model in comparison with the actual one can evaluate the nephroprotection effectiveness; it differs significantly from the classical ones at the CKD late stages.

Mineral waters make it possible not only to influence significantly the processes of normal life, replenishing the body with the necessary microelements and biologically active substances that are produced by certain microbes living in water, and to maintain the necessary acid-base balance and water balance in the body, but, most importantly, they allow successfully treating many diseases and increasing the body»s defenses. Mineral waters contain more than 50 different chemical elements in the form of salts: bicarbonates, sulfate chlorides, metals, and microelements (potassium, sodium, calcium, magnesium, iron, copper, zinc, molybdenum, cobalt, fluorine, iodine, bromine).

Clinical guidelines are intended for gastroenterologists, internists, and general practitioners and focus primarily on the management of patients with symptomatic uncomplicated diverticular disease, as well as on the primary and secondary prevention of acute diverticulitis and other complications of diverticular disease. Clinical guidelines were developed by the Russian Scientific Medical Society of Internal Medicine, the Gastroenterological Scientifi c Society of Russia, and the North-West Society of Gastroenterologists and Hepatologists. One of the reasons for creating new clinical guidelines is that the current guidelines on diverticular disease (2021) pay much more attention to complications of diverticular disease and surgical treatment of acute and chronic complications of the disease.

The review article presents dates about the physiology and pathophysiology of the hemostasis system, discusses the features of the use of oral anticoagulants in clinical practice. Oral anticoagulants are drugs characterized by predictable pharmacokinetics and pharmacodynamics, a favorable efficacy and safety profile. The article considers the main clinical and pharmacological characteristics of apixaban, rivaroxaban and dabigatran (bioavailability, metabolism, excretion); factors that increase the risk of gastrointestinal bleeding associated with anticoagulant therapy; drug interactions; the possibility of gastroprotection in patients taking oral anticoagulants. In real clinical practice, the reason for not prescribing or unreasonably reducing the dose of oral anticoagulants is the fear of bleeding. In this case, the risks of bleeding, as a rule, are overestimated. Knowledge of bleeding risk factors, prognostic scales and management of risk factors is an approach that can improve the safety of anticoagulant therapy. In clinical practice, the choice of the ideal oral anticoagulants, in addition to taking into account the risk of bleeding, should be based on a comprehensive assessment, including an assessment of the patient's age, risk of stroke and coronary events, renal function, and predicted compliance.

The Russian consensus on prevention, diagnostic and treatment of gastric cancer was prepared on the initiative of the Moscow clinical scientific center named after A. S. Loginov according to the Delphi method. Its aim was to clarify and consolidate the opinions of specialists on the most relevant issues of prevention, diagnosis and treatment of gastric cancer. An interdisciplinary approach was provided by the participation of leading gastroenterologists, oncologists and surgeons.

Clostridioides difficile infection (CDI) is the most common cause of antibiotic-associated diarrhea, and an important cause of nosocomial infection. Since the publication of the National Guidelines (2016, 2017), new data have been accumulated on the genetic structure and pathogenic properties of the most common causative agent of severe forms of antibiotic- associated diarrhea, which has led to the reclassifi cation of the pathogen, formerly known as Clostridium diffi cile, to Clostridioides difficile. Laboratory algorithms have been developed to diagnose CDI and determine the toxigenicity of strains reliably. New data on the effectiveness of antibacterials have been published, monoclonal antibodies to toxin B (bezlotoxumab) have been introduced into clinical practice to prevent CDI recurrence, and fecal microbiota transplantation has been proposed. Over the past 5 years, many international guidelines on the management of adult patients with CDI have also been updated (USA, EU). In the last decade, including due to the COVID-19 pandemic, there has been an increase in CDI incidence. Considering therelevance of CDI, new data on the pathogen, and domestic features, the Russian Scientific Medical Society of Internal Medicine, the Gastroenterological Scientific Society of Russia, and the North-West Society of Gastroenterologists and Hepatologists developed these clinical guidelines.

Aim . To analyze newly diagnosed diseases and features of the post-COVID course in patients after a coronavirus disease 2019 (COVID-19) within 12-month follow-up. Material and methods . A total of 9364 consecutively hospitalized patients were included in the ACTIV registry. Enrollment of patients began on June 29, 2020, and was completed on March 30, 2021, corresponding to the first and second waves of the pandemic. Demographic, clinical, and laboratory data, computed tomography (CT) results, information about inhospital clinical course and complications of COVID-19 during hospitalization were extracted from electronic health records using a standardized data collection form. The design included follow-up telephone interviews with a standard questionnaire at 3, 6, and 12 months to examine the course of post-COVID period. Results . According to the ACTIV registry, 18,1% of patients after COVID-19 had newly diagnosed diseases (NDDs) over the next 12 months. Hypertension (HTN), type 2 diabetes and coronary artery disease (CAD) prevailed in the NDD structure. Comparison of the age-standardized incidence of NDDs (HTN, CAD, diabetes) in the post-COVID period in the ACTIV registry with NDD incidence in 2019 according to Rosstat and the expected incidence of NDDs according to the EPOHA study revealed that HTN, diabetes, CAD in patients after COVID-19 were registered more often as follows: HTN by 7,0 and 4,4 times, diabetes by 7,3 and 8,8 times, CAD by 2,3 and 2,9 times, respectively. NDDs most often developed in patients aged 47 to 70 years. Comparison of the actual and expected number of cases of newly diagnosed HTN, CAD and diabetes depending on age showed that the actual number of cases in the population of patients in the ACTIV register is significantly higher than expected for patients aged 45-69 years and for patients with hypertension or diabetes and aged <45 years. Patients with NDDs, compared with patients without NDDs, had a more severe acute COVID-19 course. Statistically significant independent predictors of NDD occurrence (HTN and/or diabetes and/or CAD) within 1 year after hospital discharge were age (direct relationship), body mass index (direct relationship) and glucose levels upon admission to hospital (direct relationship). Conclusion . Available evidence suggests that a strategy for managing COVID-19 survivors should include mandatory screening for early detection of cardiovascular disease and diabetes, which will be key to reducing the risk of further COVID-19 consequences.

A clinical case of a 71-year-old patient with intraductal papillary mucinous neoplasia (IPMN) is presented. The diagnosis was established using endoscopic retrograde cholangiopancreatography, magnetic resonance imaging, computed tomography. Asymptomatic course, absence of pain syndrome, obstruction, exocrine and endocrine pancreatic failure, relatively satisfactory general health, but the presence of structural changes: an increase cyst in the head of the pancreas measuring 2723 mm, expansion of the main pancreatic duct up to 13 mm raised doubts about the choice of treatment tactics, the need for surgical intervention. To exclude the risk of malignancy and the choice of treatment tactics, a fine-needle aspiration biopsy was performed, a cytological examination of the material, an expert opinion determined the scope of the surgical intervention. IPMN is a rather rare tumor of the pancreas. For a long time, IPMN flow under the guise of chronic pancreatitis. Depending on the type of degree of dysplasia and invasiveness of IPMN, the tactics of treatment and the volume of surgical intervention are determined. High-tech methods provide high information content in the diagnosis of IPMN. But only a morphological study allows you to determine the tactics of treatment.

BACKGROUND. There is enough evidence of the negative impact of excess weight on the formation and progression of res piratory pathology. Given the continuing SARS-CoV-2 pandemic, it is relevant to determine the relationship between body mass index (BMI) and the clinical features of the novel coronavirus infection (NCI). AIM. To study the effect of BMI on the course of the acute SARS-COV-2 infection and the post-covid period. MATERIALS AND METHODS. AKTIV and AKTIV 2 are multicenter non-interventional real-world registers. The АКТИВ registry (n=6396) includes non-overlapping outpatient and inpatient arms with 6 visits in each. The АКТИВ 2 registry (n=2968) collected the data of hospitalized patients and included 3 visits. All subjects were divided into 3 groups: not overweight (n=2139), overweight (n=2931) and obese (n=2666). RESULTS. A higher BMI was significantly associated with a more severe course of the infection in the form of acute kidney injury (p=0.018), cytokine storm (p<0.001), serum C-reactive protein over 100 mg/l (p<0.001), and the need for targeted therapy (p<0.001) in the hospitalized patients. Obesity increased the odds of myocarditis by 1,84 times (95% confidence interval [CI]: 1,13–3,00) and the need for anticytokine therapy by 1,7 times (95% CI: 1,30–2,30).The patients with the 1st and 2nd degree obesity, undergoing the inpatient treatment, tended to have a higher probability of a mortality rate. While in case of morbid obesity patients this tendency is the most significant (odds ratio — 1,78; 95% CI: 1,13-2,70). At the same time, the patients whose chronical diseases first appeared after the convalescence period, and those who had certain complaints missing before SARS-CoV-2 infection, more often had BMI of more than 30 kg/m2 (p<0,001).Additionally, the odds of death increased by 2,23 times (95% CI: 1,05-4,72) within 3 months after recovery in obese people over the age of 60 years CONCLUSION. Overweight and/or obesity is a significant risk factor for severe course of the new coronavirus infection and the associated cardiovascular and kidney damage Overweight people and patients with the 1st and 2nd degree obesity tend to have a high risk of death of SARS-CoV-2 infection in both acute and post-covid periods. On top of that, in case of morbid obesity patients this tendency is statistically significant. Normalization of body weight is a strategic objective of modern medicine and can contribute to prevention of respiratory conditions, severe course and complications of the new coronavirus infection.

Atrial fibrillation (AF) is the most commonly diagnosed cardiac arrhythmia in adults, the frequency of which increases in patients with chronic kidney disease (CKD). The substrate for the development of AF is atrial cardiomyopathy, which includes structural, electrophysiological and molecular remodeling of the atria. AF, in turn, can initiate and accelerate the progression of CKD. Such a bidirectional relationship causes a frequent combination of these two conditions, leading to both a prothrombotic state and an increased risk of bleeding. In patients with CKD, the pharmacokinetics of drugs used in AF are changing, what limits their use in CKD S4/S5. If previously patients with CKD S4-5 were excluded from randomized clinical trials (RCTs) on treatment strategies for AF, a number of such studies on their management have been published to date. The purpose of the article is to review existing ideas about the features of the pathogenesis of AF in CKD and strategies of recent years for the treatment of AF with advanced stages of CKD.

Aim. To investigate on post-COVID period in patients of the Eurasian region.Material and methods. A total of 9364 consecutively hospitalized patients were included in ACTIV registry. Enrollment of patients began on June 29, 2020, and was completed on March 30, 2021, corresponding to the first and second waves of the pandemic. Demographic, clinical, and laboratory data, computed tomography (CT) results, information about inhospital clinical course and complications of COVID-19 during hospitalization were extracted from electronic health records using a standardized data collection form. The design included follow-up telephone interviews with a standard questionnaire at 3, 6, and 12 months to examine the course of post-COVID period.Results. According to ACTIV register, 63% of patients after COVID-19 had new adverse symptoms or exacerbations of the existing symptoms lasting for up to 1 year. After hospital discharge, 79,8% of patients sought unscheduled medical attention in the first 3 months, 79,1% at 4-6 months, and 64,8% at 7-12 months. Readmission rate was 11,8% in the first 3 months, 10,9% at 4-6 months, and 10,1% at 7-12 months. The most common reasons for unscheduled treatment in the first 3 months were uncontrolled hypertension, decompensated type 2 diabetes, destabilization of coronary artery disease, gastrointestinal disease, AF episodes, exacerbation of asthma and chronic obstructive pulmonary disease, decompensated heart failure (HF). The 12-month mortality of COVID-19 survivors after the discharge was 3,08%. Multivariate analysis showed that independent risk factors for fatal outcome were age (direct correlation), the levels of hemoglobin (inverse correlation), oxygen saturation (inverse correlation), and aspartate aminotransferase (direct correlation), as well as class III-IV HF, prior stroke, cancer, inhospital acute kidney injury. Based on these identified risk factors, a nomogram was constructed to determine the 3-month mortality risk after discharge.Conclusion. Analysis of ACTIV register showed that end of the acute phase of COVID-19 does not imply a complete recovery.

BACKGROUND:The recent data on the prevalence of Helicobacter pylori (H. pylori) infection in Russia are limited. The aim of the study was to compare Helicobacter pylori infection prevalence in ambulatory settings in Russia in 2017 and 2019 years. MATERIALS AND METHODS:Subjects visiting primary care centers were invited to take part in the study. H. pylori status was assessed by 13 C-urea breath test (UBT). Data on subjects' demography, previous treatment exposure, and place of residence were collected in all federal districts of Russia in 2017 and in 2019 calendar years and processed centrally. RESULTS:The data of 19,875 subjects were available for analysis. The prevalence of H. pylori infection assessed by positive UBT in treatment-naive subjects was highest in the Southern (54.9%) and the North Caucasian (45.1%) federal districts. A significant difference (p < 0.05) in H. pylori prevalence between two testing periods was found only in a half of federal districts: the Central (46.2% in 2017 vs. 36.2% in 2019), the Northwestern (38.6% vs. 35.5% accordingly), the Volga (40.6% vs. 33.0%, accordingly), and the Ural (40.4% vs. 32.7%, accordingly). The lowest prevalence of H. pylori infection was revealed in the age group <18 years old (20.2%), while the highest in the age group of 41-50 years old (43.9%). In 2017, the prevalence of H. pylori was significantly (p < 0.05) higher than in 2019 in all age groups but younger than 18 and older than 70 y.o., where similar rates were found during both study periods. CONCLUSIONS:The prevalence of H. pylori according to 13 C-UBT testing of primary care visitors in Russia is lower than expected (38.8%). The highest prevalence of H. pylori infection found in the Southern and the North Caucasian federal districts of Russia and in the age group of 41-50 years old. This study was registered at clinicaltrials.gov (NCT04892238).

Aim. To evaluate the advantages of using combined therapy of proton-pump inhibitors (PPIs) and esophagoprotector in comparison with basic therapy of PPIs for 4 weeks based on the results of changes in the endoscopic picture.To compare the effectiveness of 4-week PPI therapy and 4-week combination therapy with PPI and esophagoprotector Alfasoxx (sodium hyaluronate, chondroitin sulfate, poloxomer 407) in patients with erosive esophagitis (EE) of any degree according to the Los Angeles Endoscopic Classification. Materials and methods. 81 patients with EE AC according to the Los Angeles endoscopic classification (1994) was enrolled in the study on the basis of the clinic of Peter the Great, Mechnikov North-Western State Medical University. By computer randomization, patients were divided into the control group 40 patients (pantoprazole 40 mg 1 time per day) and the intervention group 41 patients (pantoprazole 40 mg 1 time per day + Alfasoxx 1 sachet qid). The therapy was carried out for 4 weeks. In all patients before and after therapy, the frequency and severity of the main symptoms of gastroesophageal reflux disease (GERD) were assessed, esophagogastroduodenoscopy was performed. Results. The advantage of combination therapy over standard PPI monotherapy in patients with EE was revealed. According to the results of the control endoscopy, healing of erosions of the esophageal mucosa was observed in 39 out of 41 (95.1%) patients in the intervention group and 32 out of 39 (82.1%) in the control group. The proportion of patients who showed an improvement in the endoscopic picture before and after treatment for 4 weeks by at least 1 level according to the Los Angeles classification was significantly higher in the comparison group 41 patients (100%), while in the control group 33 patients (85%); p0.009. After treatment, the combination therapy group had a lower incidence (p0.01) and severity of heartburn (p0.01). The same results are demonstrated by combination therapy regarding the symptom belching of air: in the study group after treatment, this symptom occurred less frequently (p=0.014), its severity was significantly less than in the control group (p0.01). There was a statistically significant decrease in the need for on-demand antacid therapy in the study group. Conclusion. In this study involving 81 patients with erosive GERD, the benefits of combination therapy were demonstrated. The addition of Alfasoxx medical device to PPI therapy increases the clinical and endoscopic efficacy of therapy. This positive effect is associated with the esophagoprotective properties of the drug, based on unique pharmacodynamic characteristics. Combination therapy for GERD is preferred in patients with EE. Studies have shown the expediency of using Alfasoxx in case of insufficient effectiveness of classical acid-suppressive therapy for GERD.

Mitochondrial neurogastrointestinal encephalomyopathy is an extremely rare (1–9:1 000 000, Orphanet, 2021) multisystem genetic disease caused by mutations in the TYMP gene encoding the enzyme thymidine phosphorylase.The article presents the data of a thirteen‑year survey on 40‑year‑old patient D. with clinical manifestations of mitochondrial neurogastrointestinal encephalomyopathy syndrome associated with the previously undescribed missense mutation c.1301G>T (p.Gly434Val) of the TYMP gene. Detailed clinical picture (gastrointestinal dysfunction, cachexia, blepharoptosis, ophthalmoparesis, peripheral polyneuropathy and leukoaraiosis), electroneuromyography data (demyelination with secondary axonopathy), high blood serum level of dihydrothymine together with normal levels of thymidine and deoxyuridine made it possible to verify the diagnosis. Histopathological examination revealed atrophy of the longitudinal (outer) muscle layer of the small and large intestines and a significant decrease in the number of CD117+ cells (telocytes), signs of damage to the striated skeletal muscles of a mixed nature with a predominance of the myogenic pattern, as well the destruction of the myelin sheaths of peripheral nerves. Histochemical examination did not reveal “ragged red fibers” characteristic of mitochondrial pathology. Transmission electron microscopy demonstrated the presence of megalomitochondria in the myocardium.