Predictive value of laboratory markers in the development of cardiac events in patients with stable coronary artery disease after elective endovascular revascularization.

Aim      To reveal a relationship between preprocedural laboratory data and adverse cardiac outcomes (CO) in patients with stable ischemic heart disease (IHD) following elective endovascular revascularization (ER).Material and methods  This study included 225 patients with IHD admitted for treatment to the Research Institute of Cardiology of the Tomsk National Research Medical Center. The study included patients with documented IHD and hemodynamically significant coronary stenoses requiring elective ER. Patients were divided into groups based on the presence of complications: group 1, 98 patients with adverse CO and group 2, 127 patients without adverse CO. Besides evaluation of complaints, history, and objective status, general clinical and biochemical tests were performed for all patients. Concentration of glycated hemoglobin (НbА1с) was measured by immunoturbidimetry (DiaSys Diagnostic Systems). Serum concentrations of insulin, interleukin-6 (IL-6), endothelin 1 (ET-1), and homocysteine were measured by enzyme immunoassay. Blood lipid profile was determined by enzymatic colorimetry (DiaSys). Content of non-high-density lipoprotein (non-HDL) cholesterol (CS) was calculated as: CS - HDL CS. Insulin resistance (IR) was assessed by the HOMА-IR index. IR was diagnosed at the index of 2.77. Statistical analyses were performed with Statistica 10.0 and Medcalc 19.2.6 software.Results A one-way regression analysis identified predictors for adverse CO following ER. The most significant predictors were fibrinogen (odds ratio (OR), 1.430; 95 % confidence interval (CI), 1.027-1.990), HbA1c (OR 1.825; 95 % CI, 1.283-2.598), homocysteine (OR, 1.555; 95 % CI, 1.348-1.794), ET-1 (OR, 94.408; 95 % CI, 16.762-531.720), triglycerides (TG)/glucose ratio (OR 1.815; 95 % CI, 1.155-2.853). Based on selected factors, logistic regression models were constructed. However, not all models had a high prognostic power. Only concentrations of ET-1 and homocysteine showed a high prognostic capability in respect of the adverse outcome (88.3 and 85.7 %, respectively).Conclusion      For patients with IHD, the prognostic capability of ET-1 and homocysteine with respect of the risk for adverse CO following ER was the highest compared to other markers. The results of the study are completely consistent with data of literature and can be successfully used in clinical practice for optimizing the medical care of patients after elective ER.