Background: Coronary artery bypass grafting (CABG) remains a standard revascularization strategy for patients with advanced coronary artery disease (CAD). However, a considerable proportion of patients experience recurrent ischemia requiring repeat revascularization. Residual platelet reactivity (RPR) and dyslipidemia are recognized as key factors contributing to graft failure and disease progression. Methods: This observational study was conducted at a tertiary cardiology center in Kazakhstan. A total of 195 post-CABG patients who underwent repeat coronary angiography between 2023 and 2024 recruitment period for recurrent ischemic symptoms within 6–36 months after surgery were included. Clinical characteristics, comorbidities, lipid profiles, and antiplatelet response were analyzed. RPR was measured using the VerifyNow P2Y12 assay when available. Dyslipidemia was defined according to the 2019 and 2021 European guidelines. Results: Elevated RPR was identified in 45% of patients (n = 90) despite dual antiplatelet therapy (p < 0.01). Poor lipid control was frequent among those who underwent repeat percutaneous coronary intervention (PCI), particularly elevated levels of low-density lipoprotein cholesterol (LDL-C) and total cholesterol (p < 0.05). Both elevated RPR and dyslipidemia were independently associated with native coronary disease progression and graft failure (RPR: OR = 2.8; 95% CI 1.4–5.6; p = 0.003; dyslipidemia: OR = 2.2; 95% CI 1.1–4.3; p = 0.02). The use of ezetimibe was independently associated with a significantly lower risk of repeat stenting (OR = 0.12; 95% CI 0.02–0.75; p = 0.023). Smokers were younger, had lower blood pressure, and less frequently presented with diabetes or chronic kidney disease, demonstrating a pattern consistent with the “smoker’s paradox.” Conclusions: Residual platelet reactivity and dyslipidemia are common and clinically relevant predictors of repeat revascularization after CABG. Optimization of antiplatelet and lipid-lowering therapy should be prioritized in secondary prevention for this high-risk population. These findings are particularly important in Kazakhstan, where post-CABG management strategies warrant further improvement.

Background: Optimal platelet inhibition is essential for minimizing both thrombotic and hemorrhagic complications in patients with coronary artery disease (CAD). Although high on-treatment platelet reactivity (HPR) has been consistently associated with adverse clinical outcomes, the relationship between platelet reactivity—measured as P2Y12 reaction units (PRU)—and cardiovascular mortality remains incompletely characterized. In particular, potential non-linear associations have not been adequately explored. Objective: We aimed to investigate the association between PRU and cardiovascular mortality in patients with CAD, with a specific focus on identifying potential non-linear relationships. Methods: We conducted a retrospective observational cohort study including 1000 patients with angiographically confirmed CAD treated at a tertiary cardiology center in Almaty, Kazakhstan, between 2024 and 2025. Platelet reactivity was assessed using the VerifyNow P2Y12 assay. Multivariable logistic regression models were used to identify independent predictors of cardiovascular mortality. To assess potential non-linear associations between PRU and mortality, restricted cubic spline regression was applied with predefined knot placement. Model performance was evaluated in terms of discrimination (C-statistic) and calibration (Hosmer-Lemeshow goodness-of-fit test). Results: In conventional linear regression models, PRU was not independently associated with cardiovascular mortality (odds ratio [OR] ~1.00; p > 0.05). However, spline-based analyses demonstrated a statistically significant non-linear (U-shaped) relationship between PRU and mortality risk (p for non-linearity = X). Both low and high PRU values were associated with increased mortality, whereas intermediate PRU levels corresponded to the lowest observed risk. Additional independent predictors of mortality included advanced age, diabetes mellitus, and elevated inflammatory markers. Conclusions: Our findings reveal a significant non-linear association between platelet reactivity and cardiovascular mortality in patients with CAD. Both insufficient and excessive platelet inhibition appear to confer increased risk, suggesting that optimal PRU targets may lie within an intermediate therapeutic range. These results support a paradigm shift toward more individualized antiplatelet therapy strategies guided by platelet function testing.

Aim. To investigate the prevalence and characteristics of polyvascular disease in the Eurasian region's population with one or more previously established locations of atherosclerotic arterial damage, and to evaluate the diagnostic importance of the ankle-brachial index (ABI) as a marker for polyvascular disease (PVD).Material and methods. A total of 1837 patients were included in the main branch of the KAMMA registry (patients with PVD), among which 91,6% had coronary artery disease (CAD) (n=1683). For further analysis, the group of patients with CAD was combined with 1222 patients included in the second branch of the registry — KAMMA-cardio, forming a patient population (n=2905), in which all patients had verified CAD. The mean age of patients was 66,0 [59,0; 72,0] years, with 60,3% being male. Peripheral arteries was assessed using ultrasound examination.Results. PVD was present in 95,6% of patients with coronary atherosclerosis: dual-region involvement was observed in 51,3% of patients, three-region involvement in 37,1%, four-region involvement in 3,4%, and five-region involvement in 2,0%. Stenoses of the common carotid artery were observed in 71% of patients, internal carotid artery — in 68%, lower limb artery — in 52%, and renal and mesenteric artery — in 8,3%. There were following diagnostic effectiveness of the ABI for detecting patients with lower limb artery stenosis was: sensitivity — 58,0%, specificity — 83,6%. The quality of antithrombotic and lipid-lowering therapy was insufficient.Conclusion. In the overwhelming majority (95,6%) of patients with CAD in the KAMMA registry, PVD was revealed, with nearly half of the patients having involvement in three or more arterial zones. In the patient population with CAD, there should be an active effort to identify patients with PVD, using at least the ABI determination and active modern antithrombotic and lipid-lowering therapy according to current clinical guidelines.

Background: High residual platelet reactivity (HRPR) and persistent dyslipidemia remain important unmet needs in cardiovascular risk management, particularly in patients undergoing coronary revascularization. Despite intensive lipid-lowering and antiplatelet therapy, a substantial proportion of patients fail to reach recommended low-density lipoprotein cholesterol (LDL-C) targets or exhibit inadequate platelet inhibition. Inclisiran, a PCSK9-targeting small interfering RNA, represents an emerging approach for long-term LDL-C reduction. Methods: A narrative review of the literature published between 2009 and 2025 was performed using PubMed, Scopus, Web of Science, and MEDLINE. Studies evaluating the addition of inclisiran to standard lipid-lowering therapy in patients with dyslipidemia and HRPR, assessed using the VerifyNow assay, were included. Illustrative clinical cases from Kazakhstan were analyzed to demonstrate real-world changes in LDL-C levels and platelet reactivity following insufficient response to conventional treatment. The review had a descriptive design. Results: Available evidence indicates that a significant proportion of high- and very-high-risk patients do not achieve LDL-C targets or are unable to tolerate high-intensity statin therapy. Inclisiran consistently induces sustained reductions in LDL-C and circulating PCSK9 levels. Emerging data suggest a potential indirect modulation of platelet reactivity associated with intensive lipid lowering. In patients at extreme cardiovascular risk—including those after coronary artery bypass grafting (CABG) and with long-standing multivessel coronary artery disease—inclisiran therapy was associated with marked LDL-C reduction and a trend toward normalization of platelet reactivity. Conclusions: Assessment of platelet function using the VerifyNow assay may improve identification of residual thrombotic risk in patients with advanced atherosclerotic disease. Inclisiran appears to be a promising adjunctive therapy for dyslipidemic patients with persistently elevated cardiovascular risk and HRPR despite standard treatment. Further prospective studies are warranted to clarify the relationship between intensive LDL-C lowering, platelet reactivity, and clinical outcomes, and to optimize integrated lipid-lowering and antiplatelet strategies.

Aim. To study the clinical status and data of laboratory and instrumental examination of patients with non-obstructive ischemic heart disease (IHD) and multifocal atherosclerosis (MFA) included in the KAMMA registry. Material and methods. The subanalysis included 1,893 IHD patients who underwent coronary angiography (CAG) and ultrasonic examination of peripheral arteries. Based on the CAG data, patients were divided into two groups: group 1, patients with obstructive coronary atherosclerosis (CA) (maximum stenosis ≥50% and/or history of percutaneous coronary intervention/coronary artery bypass grafting, n=1728; 91.3%) and group 2, patients with non-obstructive CA (maximum stenosis <50%, n = 165; 8.7%). Results. A comparative analysis based on the degree of coronary obstruction in patients with verified IHD who were included in the KAMMA registry showed that 8.7% of them had coronary artery stenosis of less than 50%. The overwhelming majority of patients with non-obstructive CA had MFA affecting the brachiocephalic arteries in 94.3% and the lower extremity arteries in 40.2%. Among patients with non-obstructive IHD, women predominated; risk factors such as smoking and type 2 diabetes mellitus were less frequent in this group than in the obstructive IHD group. Patients with non-obstructive CA more frequently had a history of dyslipidemia; they had higher total cholesterol and non-high-density lipoprotein cholesterol; and they more frequently received moderate-intensity statin therapy than patients with obstructive CA (55.8% vs. 34.5%). Characteristic features of patients with non-obstructive CA were less severe IHD and less frequent history of acute coronary syndrome. However, the incidence of stroke, peripheral arterial thrombosis, and chronic arterial insufficiency of the lower extremities did not differ in groups 1 and 2, whereas the incidence of paroxysmal atrial fibrillation was higher in the non-obstructive IHD group. Conclusion. IHD patients without coronary obstruction also require assessment of the peripheral arterial status, as they may have advanced MFA, which should be taken into account when choosing the “aggressiveness” of therapy.

А. М. Майкенова, Ф.Е. Рустамова АНАЛИЗ ВЛИЯНИЯ РЕЖИМА ПИТАНИЯ НА ВОЗНИКНОВЕНИЕ ГАСТРОПАТОЛОГИИ У СТУДЕНТОВ ВУЗОВ КАЗАХСТАНА...