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Recommendations for Institutions Transitioning to High-Sensitivity Troponin Testing JACC Scientific Expert Panel Contemporary use of drug-coated balloons in coronary artery disease: Where are we now? 中国肺高血压诊断和治疗指南2018 Diagnosis and Prognosis of Coronary Artery Disease with SPECT and PET Hemodynamic Response to Nitroprusside in Patients With Low-Gradient Severe Aortic Stenosis and Preserved Ejection Fraction Risk Stratification Guided by the Index of Microcirculatory Resistance and Left Ventricular End-Diastolic Pressure in Acute Myocardial Infarction Comparison in prevalence, predictors, and clinical outcome of VSR versus FWR after acute myocardial infarction: The prospective, multicenter registry MOODY trial-heart rupture analysis Optimal medical therapy vs. coronary revascularization for patients presenting with chronic total occlusion: A meta-analysis of randomized controlled trials and propensity score adjusted studies Prognostic Value of the Residual SYNTAX Score After Functionally Complete Revascularization in ACS Radial versus femoral access and bivalirudin versus unfractionated heparin in invasively managed patients with acute coronary syndrome (MATRIX): final 1-year results of a multicentre, randomised controlled trial

Review Article2018 Sep;72(3):179-185.

JOURNAL:J Cardiol. Article Link

Histopathological validation of optical coherence tomography findings of the coronary arteries

Fujii K, Kawakami R, Hirota S. Keywords: atherosclerosis; OCT; Stent; histopathological validation

ABSTRACT


Optical coherence tomography (OCT), a catheter-based imaging modality for the visualization of coronary arteries, is widely used during percutaneous coronary intervention to improve the understanding of the anatomy of coronary artery stenosis and to elucidate the mechanisms of atherosclerosis. In this review, we provide a short description of the histopathological validations of OCT for visualizing atherosclerotic plaques and vascularhealing response after drug-eluting stent (DES) implantation. Because OCT measures the intensity of light returning from within a tissue, tissue having a higher heterogeneity of optical index of refraction, such as microcalcification deposition and foam cell accumulation on the luminal surface, may exhibit stronger optical scattering that appears as a thin-cap fibroatheroma image. Furthermore, even if OCT shows exposed uncovered stent struts, some of the struts could be re-endothelialized. In our ex vivo histopathological experience, re-endothelialization at the surface of stent struts was confirmed by histopathological analysis, although OCT images showed exposed uncovered struts after DES implantation. Therefore, careful interpretation is required to assess tissue morphology and stent strut coverage by OCT.