Background: The objective of this study is to examine the impact of medication adherence on the timing of non-cardiovascular serious events (NCDS) onset in patients with acute coronary syndrome (ACS) after percutaneous coronary intervention (PCI). Methods: This prospective study was conducted at a single center and involved 220 ACS patients who underwent sequential PCI with stenting. The Morisky Green Levine Medication Adherence Scale was employed to assess adherence to dual antiplatelet therapy (DAPT) and its impact on NCDS occurrence. Early in their hospitalization, all patients received education at the Coronary Heart Disease School. The survival rates of patients in both the main group and a control group (n=355) were subsequently evaluated. Results: The study findings indicated an inverse relationship between stent thrombosis development (Rho=− 0.334; p=0.001) and the timing of recurrent myocardial ischemia. There was also an inverse correlation between patient adherence and stent thrombosis development (Rho=− 0.275; p=0.009). Non-adherent individuals had a 16.8 times higher likelihood of experiencing stent thrombosis compared to compliant patients (p< 0.001). Following participation in the CHD School program, treatment adherence increased from 56.5% to 88.2%. Education for ACS patients post-stenting was significantly associated with all-cause mortality within the first 6 months (p=0.040). Conclusion: Secondary preventive measures, including education, impact the success of endovascular interventions in both the early hospital phase and the long term. Patient education can serve as a supplementary intervention to enhance DAPT adherence, thus diminishing the risk of recurrent cardiovascular events and mortality post endovascular intervention.

Introduction: High residual platelet reactivity (RPR) in patients after percutaneous coronary intervention (PCI) receiving antiplatelet agents has been associated with a high risk of developing acute kidney injury (AKI). Study aim: This study aimed at identification of independent prognostic predictors of AKI risk in patients with acute coronary syndrome (ACS) after PCI. Study design, setting and patients: This was a prospective single-center clinical trial that included 155 patients (n = 119 without AKI, n = 36 with AKI, mean age 64.0±10.6 years, of whom 74.2% were males), who underwent PCI with stenting. We prospectively evaluated RPR using optical aggregometry. Development of AKI was the primary endpoint. Results: Acute renal dysfunction was observed in 36 patients (23.2%) after PCI, the risk factors of which according to univariate regression analysis were: age (p = 0.040), low diastolic blood pressure (DBP) (p = 0.001), having severe heart failure (HF) according to Killip (p<0.001), low level of hemoglobin (p = 0.026) and erythrocytes (p = 0.005), increased creatinine (p<0.001), low baseline glomerular filtration rate (GFR) (p<0.001), low left ventricular ejection fraction (LV EF) (p = 0.003), high residual platelet reactivity (RPR) (p<0.001) and platelet aggregation area under the curve (AUC) with 10 μg/mL ADP (p<0.001), as well as dose of X-ray contrast medium (XCM) (p = 0.008). As a result of multivariate regression analysis the following independent predictors of AKI were established with the inclusion of the above factors: baseline creatinine level [OR 1.033 at 95% CI from 1.017 to 1.049; p<0.001], RPR with 10 μg/mL ADP [OR 1.060 at 95% CI from 1.027 to 1.094; p = 0.001], dose of an XCM [ОR 1.005 at 95% CI from 1.001 to 1.008; р = 0.014], diastolic blood pressure (DBP) [OR 0.926 at 95% CI from 0.888 to 0.965; p<0.001]. Conclusion: ADP-induced high residual platelet reactivity, baseline creatinine level, X-ray contrast medium, low diastolic blood pressure were independent predictors of AKI in patients with ACS after PCI.

Purpose : to elucidate independent clinical and laboratory predictors of adverse cardiovascular events (ACVE) in patients with acute coronary syndrome (ACS) after percutaneous coronary intervention (PCI) with stenting in early inhospital period. Materials and methods . We included in this prospective single center study 130 patients with ACS who underwent PCI with stenting. All patients prior to and after PCI received dual antiplatelet therapy with acetylsalicylic acid and clopidogrel. In 12–48 hours after PCI we measured residual platelet reactivity (RPR) using light aggregometry. In 57 patients simultaneously we performed genotyping of CYP2C19*2 polymorphisms. The following ACVE were used as end­points and were registered during inhospital observation (mean duration 9.7±3.2 days): sudden death, stent thrombosis, arterial thrombosis of other localization, recurrent angina, cardiac rhythm disturbances requiring special therapy. Results. Repetitive ACVE were observed in 32 patients. According to unifactorial regression analysis risk factors of their development were, ADP F­induced RPR (р<0.001), levels of creatinine (р<0.001), hemoglobin (р76 % (р=0.003), levels of creatinine >189 µmol / L (р=0.003), and hemoglobin <114 g / L (р=0.004). Significant effect of homozygous carriage of CYP2C19*2 (G681A) (А / А) on development of stent thrombosis was also detected (р=0.028). Conclusion. ADP­induced RPR, levels of creatinine and hemoglobin were found to be independent predictors of inhospital ACVE after myocardial revascularization with stenting in patients with ACS.

According to recommendations of ESC 2020-year, de-escalation of therapy with a P2Y12 receptor inhibitor (transition from prasugrel or ticagrelor to clopidogrel) It can be considered as an alternative strategy of dual antiplatelet therapy (DAPT) for patients with acute coronary syndrome (ACS) who are unsuitable for the use of a strong platelet inhibitor.De-escalation can be performed based on an individual clinical evaluation under the supervision of platelet function testing or CYP2C19 genotyping, depending on the patient’s risk profile and the availability of appropriate diagnostic methods. The optimal dosage of strong P2Y12 receptor inhibitors, such as ticagrelor or prasugrel is not entirely clear and is especially difficult to define for patients of Asian nationality.The article describes a clinical case of antiplatelet therapy de-escalation, particularly a dose reduction of the potent P2Y12 receptor inhibitor ticagrelor in a patient after percutaneous coronary intervention (PCI) with a high risk of bleeding based on platelet function determination and genetic testing. A 47-year-old patient of Kazakh nationality was hospitalized with gastrointestinal bleeding.Given bleeding type 3 by BARC (Bleeding Academic Research Consortium) associated with DAPT, it was decided to apply a strategy to de-escalate antiplatelet therapy under the control of platelet function testing (PFT) and genetic testing.In this case, replacement of ticagrelor with the weak P2Y12 receptor inhibitor clopidogrel was not possible as the patient appeared to be a carrier of the CYP2C19*2 polymorphism contributing to loss of function of the cytochrome P-450(CYP) enzyme.

Objective: To assess the long-term outcomes of myocardial revascularization in patients with multivessel coronary artery disease and varying degrees of comorbidity. Materials and methods: 406 patients with low and moderate Syntax scores (SS) (<33) underwent primary percutaneous coronary intervention (PCI) (n=200) with a drug-eluting stent, and coronary artery bypass grafting (CABG) (n=206). Patients were stratified by the Charlson Comorbidity Index (CCI) into 2 groups: 1) CCI ≤ 3(n=108/26.6%); 2) CCI ≥ 4(n=298/73.4%). The mean follow-up period was 9±1.9 years. The endpoints of the study were as follows: major adverse cardiac and cerebrovascular events (МАССЕ), a repeat revascularization, decreased left ventricular ejection fraction, and high SS in dynamics. Results: An increase in CCI of more than 4 points was significantly associated with the risk of developing a combination of MACCE (HR 1.3, CI 1.2 – 1.4, p<0.001), all-cause mortality (HR 1.3, CI 1.2 – 1.4, p<0.001), and cerebrovascular accidents (CVA) (HR 2.2, CI 1.4 – 3.4, p=0.001). Patients with CCI ≥4 required repeat revascularization more frequently after PCI than after CABG (HR 2.6, CI 1.8 – 3.7, p<0.001). Among patients with varying degrees of comorbidity, the risk of progression of coronary atherosclerosis (SS≥33) was higher after CABG compared with PCI. Conclusion: A CCI score of more than 4 points was associated with an increased risk of developing of MACCE, all-cause mortality, and CVA. Among patients with varying degrees of comorbidity, PCI and CABG did not demonstrate significant advantages in terms of MACCE.