Differential healing response attributed to culprit lesions of patients with acute coronary syndromes and stable coronary artery after implantation of drug-eluting stents: An optical coherence tomography study |
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Authors: | Lorenz Rä ber,Thomas Zanchin,Sandro Baumgartner,Masanori Taniwaki,Bindu Kalesan,Aris Moschovitis,Hector M. Garcia-Garcia,Jö rn Justiz,Thomas Pilgrim,Peter Wenaweser,Bernhard Meier,Peter Jü ni,Stephan Windecker |
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Affiliation: | 1. Department of Cardiology, Bern University Hospital, Bern, Switzerland;2. Institute of Social and Preventive Medicine, University of Bern, Switzerland;3. Thoraxcenter, Erasmus Medical Center, Rotterdam, The Netherlands;4. Human-Centered Engineering Institute of Applied Sciences, Biel, Switzerland |
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Abstract: | BackgroundPathology studies have shown delayed arterial healing in culprit lesions of patients with acute coronary syndrome (ACS) compared with stable coronary artery disease (CAD) after placement of drug-eluting stents (DES). It is unknown whether similar differences exist in-vivo during long-term follow-up. Using optical coherence tomography (OCT), we assessed differences in arterial healing between patients with ACS and stable CAD five years after DES implantation.Methods and resultsA total of 88 patients comprised of 53 ACS lesions with 7864 struts and 35 stable lesions with 5298 struts were suitable for final OCT analysis five years after DES implantation. The analytical approach was based on a hierarchical Bayesian random-effects model. OCT endpoints were strut coverage, malapposition, protrusion, evaginations and cluster formation. Uncovered (1.7% vs. 0.7%, adjusted p = 0.041) or protruding struts (0.50% vs. 0.13%, adjusted p = 0.038) were more frequent among ACS compared with stable CAD lesions. A similar trend was observed for malapposed struts (1.33% vs. 0.45%, adj. p = 0.072). Clusters of uncovered or malapposed/protruding struts were present in 34.0% of ACS and 14.1% of stable patients (adj. p = 0.041). Coronary evaginations were more frequent in patients with ST-elevation myocardial infarction compared with stable CAD patients (0.16 vs. 0.13 per cross section, p = 0.027).ConclusionUncovered, malapposed, and protruding stent struts as well as clusters of delayed healing may be more frequent in culprit lesions of ACS compared with stable CAD patients late after DES implantation. Our observational findings suggest a differential healing response attributable to lesion characteristics of patients with ACS compared with stable CAD in-vivo. |
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Keywords: | Optical coherence tomography Acute coronary syndrome Drug-eluting stent Arterial healing |
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