Effect of the Drug Coating Characteristics on Vascular Remodeling: Comparing the Latest Generations of Stents

Abstract

The basic method of myocardial revascularization in acute coronary syndrome is coronary stenting. Due to the high risk of later coronary events such as restenosis and late coronary thrombosis, studies on the different types of stents are currently underway.The objective was to evaluate the degree of neointimal coverage of stents with a permanent and biodegradable polymer in one patient.The patient with unstable angina was implanted 2 everolimus-containing stents with a constant polymer (Promus Premier) and a biodegradable polymer (Synergy). After 9 months, optical coherence tomography (OCT) was performed with the calculation of indicators.774 struts of the Synergy and 701 struts of the Promus Premier were analyzed. When evaluating the thickness of the formed neointima, no significant differences was obtained (p=0.47). At the same time, a greater number of uncovered struts were detected in the Promus Premier stent compared with Synergy stent (1.14 vs. 0 %, p = 0.002). The number of malposed uncovered struts was not statistically different (0.14 versus 0.13, p = 1.00), the difference in the number of malposed struts covered approaches statistically significant (1.14 versus 0.26, p = 0.0545).According to the results of optical coherence tomography, no significant differences between the studied platforms was obtained when assessing the late lumen loss. A greater number of uncovered struts in the stent with permanent polymer was detected, which could be considered as a risk factor for the development of late coronary thrombosis.