In this example, optical coherence tomography was performed to examine tissue coverage of a stent implanted 3 weeks prior to the left circumflex artery. In this example, optical coherence tomography was performed to examine tissue coverage of a stent implanted 3 weeks prior to the left circumflex artery. At this early stage, many struts are seen with a very thin layer of tissue coverage while others still remain bare (B, arrows). Muhammad Asrar ul Haq et al. Heart Asia 2013;5:154-161 Copyright © Asia Pacific Heart Association, British Cardiovascular Society & BMJ Publishing Group Ltd. All rights reserved.