Predictors of adverse events in the mid-term postoperative period in patients who underwent carotid endarterectomy

Aim. Emphasis in the study was placed on the identification of unfavorable prognosis factors associated with carotid endarterectomy (CEE) during mid-term follow-up. Methods. Over a period from 2015 to 2016, 222 CEE operations were performed. Most patients (n = 190; 85.5%) underwent CEE using a patch of xenopericardium, 14.4% (n = 32) received eversion CEE, and a temporary shunt was used in 14.4% (n = 32). Hybrid revascularization in the volume of percutaneous coronary intervention (PCI) + CEE was performed in 9.9% (n = 22) patients. The groups under study were compared by using a chi-square test followed by subsequent analysis of the shares, or if ordinal characters or quantitative traits with a distribution different from the normal one occurred-by using a Mann - Whitney U-test. Correction of multiple comparisons was done by calculating an average fraction of false discoveries of the hypotheses (false discovery rate). The analysis of prognostic factors was done using the odds ratio (OR) by means of the 2 x 2 tables. Results. Among the complications detected in the mid-term follow-up, the most common adverse event was the development of MI in 3.6% (n = 8) of patients. According to color duplex scanning of brachiocephalic arteries, restenosis of the operated ICA was observed in 4.5% of patients. The following risk factors significantly increased the risk of adverse events: angina pectoris II-III functional class (OR = 3.84%, CI = 1.24-11.9), SYNTAX Score >22 (OR = 2.83, CI = 1.1377.086). Conclusion. Based on the results of a single-center prospective retrospective study, significant risk factors for adverse outcome in the mid-term postoperative period were identified.