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Coronary Optical Coherence Tomography

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https://www.readbyqxmd.com/read/29047360/comparison-of-circulating-dendritic-cell-and-monocyte-subsets-at-different-stages-of-atherosclerosis-insights-from-optical-coherence-tomography
#1
Jianhui Zhuang, Yang Han, Dachun Xu, Guofu Zhu, Shekhar Singh, Luoman Chen, Mengyun Zhu, Wei Chen, Yawei Xu, Xiankai Li
BACKGROUND: While specific patterns of circulating dendritic cells (DCs) and monocytes are associated with the incidence of coronary artery disease, the characterization of circulating DC and monocyte subsets in patients with different stages of atherosclerosis remains unclear. METHODS: Forty-eight patients with unstable angina pectoris (UAP) diagnosed by angiography were enrolled. Likewise, 31 patients with ST-segment elevation myocardial infarction (STEMI) were enrolled and confirmed with the presence of thrombosis by angiography...
October 18, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29045625/coronary-optical-coherence-tomography-derived-virtual-fractional-flow-reserve-ffr-anatomy-and-physiology-all-in-one
#2
Eric K W Poon, Vikas Thondapu, Eve Revalor, Andrew Ooi, Peter Barlis
No abstract text is available yet for this article.
October 17, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29044926/optical-coherence-tomography-guided-carotid-artery-stent-procedure-technique-and-potential-applications
#3
Suhail Dohad, Alexander Zhu, Sandeep Krishnan, Frances Wang, Serena Wang, Justin Cox, Timothy D Henry
OBJECTIVES: To (1) present a guide on how to perform optical coherence tomography (OCT) in carotid artery stenting (CAS), to (2) highlight several instructive cases illustrating OCT-guidance as an interventional strategy, and to (3) present the largest case-series of OCT-guided CAS performed in North America, demonstrating its feasibility as an imaging modality in this setting. BACKGROUND: OCT is an intravascular imaging method that captures images with an axial resolution 10 times higher than intravascular ultrasound...
October 16, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29036125/automatic-classification-of-atherosclerotic-tissue-in-intravascular-optical-coherence-tomography-images
#4
Ping Zhou, Tongjing Zhu, Chunliu He, Zhiyong Li
Intravascular optical coherence tomography (IVOCT) has been successfully utilized for in vivo diagnostics of coronary plaques. However, classification of atherosclerotic tissues is mainly performed manually by experienced experts, which is time-consuming and subjective. To overcome these limitations, an automatic method of segmentation and classification of IVOCT images is developed in this paper. The method is capable of detecting the plaque contour between the fibrous tissues and other components. Subsequently, the method classifies the tissues based on their texture features described by Fourier transform and discrete wavelet transform...
July 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29033367/stent-implantation-and-vascular-healing-of-a-spontaneous-coronary-artery-dissection-assessed-by-optical-coherence-tomography-in-a-patient-with-acute-coronary-syndrome
#5
Kirstine Nørregaard Hansen, Lisbeth Antonsen, Lisette Okkels Jensen
A 60-year old woman with non-ST-segment elevation myocardial infarction, underwent coronary angiogram combined with optical coherence tomography (OCT) revealing a long dissection in the right coronary artery. The patient experienced peri-procedural chest pain, the electrocardiogram showed ST-segment elevations, and compromised coronary blood flow, why mechanical revascularization with percutaneous coronary intervention (PCI) was indicated. At 1-month follow-up, OCT revealed early, competent vascular healing, and a distal stenosis was treated with PCI...
September 5, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29032714/fusion-of-optical-coherence-tomography-and-angiography-for-numerical-simulation-of-hemodynamics-in-bioresorbable-stented-coronary-artery-based-on-patient-specific-model
#6
Chenxi Huang, Yuanhang Zhou, Xiaoxin Mao, Jianhua Tong, Lei Zhang, Fei Chen, Yongtao Hao
Three-dimensional simulations of coronary artery using finite element analysis are considered as effective means to understand the biomechanical properties after the stent was deployed. Bioresorbable vascular scaffolds are new-generation stents used by people. Intravascular optical coherence tomography is an emerging technique for detecting struts. The common 3 D reconstruction methods are using Intravascular Ultrasound (IVUS) or angiographies. However, it loses the details about geometry model. Fusing of optical coherence tomography and angiography to reconstruct the bioresorbable stented coronary artery based on patient-specific mode is an innovative method to reconstruct the high fidelity geometry...
October 16, 2017: Computer Assisted Surgery (Abingdon, England)
https://www.readbyqxmd.com/read/29030347/extracellular-matrix-proteomics-reveals-interplay-of-aggrecan-and-aggrecanases-in-vascular-remodeling-of-stented-coronary-arteries
#7
Gonca Suna, Wojciech Wojakowski, Marc Lynch, Javier Barallobre-Barreiro, Xiaoke Yin, Ursula Mayr, Ferheen Baig, Ruifang Lu, Marika Fava, Robert Hayward, Chris Molenaar, Stephen J White, Tomasz Roleder, Krzysztof Milewski, Pawel Gasior, Piotr P Buszman, Pawel E Buszman, Marjan Jahangiri, Cathy Shanahan, Jonathan M Hill, Manuel Mayr
Background -Extracellular matrix (ECM) remodeling contributes to in-stent restenosis and thrombosis. Despite its important clinical implications little is known about ECM changes post-stent implantation. Methods -Bare-metal (BMS) and drug-eluting stents (DES) were implanted in pig coronary arteries with an overstretch under optical coherence tomography guidance. Stented segments were harvested 1, 3, 7, 14 and 28 days post-stenting for proteomics analysis of the media and neointima. Results -A total of 151 ECM and ECM-associated proteins were identified by mass spectrometry...
October 13, 2017: Circulation
https://www.readbyqxmd.com/read/29030141/feasibility-and-usefulness-of-three-dimensional-optical-coherence-tomography-guidance-for-optimal-side-branch-treatment-in-coronary-bifurcation-stenting
#8
Ryoji Nagoshi, Takayuki Okamura, Yoshinobu Murasato, Tatsuhiro Fujimura, Masahiro Yamawaki, Shiro Ono, Takeshi Serikawa, Yutaka Hikichi, Fumiaki Nakao, Tomohiro Sakamoto, Toshiro Shinke, Yoichi Kijima, Amane Kozuki, Hiroyuki Shibata, Junya Shite
BACKGROUND: For the treatment of coronary bifurcation lesions, optimal guidewire (GW) recrossing after main vessel stenting is important for good stent apposition at the side branch (SB) orifice in kissing balloon inflation (KBI). METHODS: We analyzed 150 bifurcation lesions treated with single stenting following KBI in the three-dimensional optical coherence tomography (3D-OCT) bifurcation registry study (2015-16) and a single center experience (2012-16). OCT examination was performed after GW recrossing to the SB and after KBI...
October 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29028985/impact-of-coronary-lumen-reconstruction-on-the-estimation-of-endothelial-shear-stress-in-vivo-comparison-of-three-dimensional-quantitative-coronary-angiography-and-three-dimensional-fusion-combining-optical-coherent-tomography
#9
Jihoon Kweon, Soo-Jin Kang, Young-Hak Kim, June-Goo Lee, Seungbong Han, Hojin Ha, Dong Hyun Yang, Joon-Won Kang, Tae-Hwan Lim, Osung Kwon, Jung-Min Ahn, Pil Hyung Lee, Duk-Woo Park, Seung-Whan Lee, Cheol Whan Lee, Seong-Wook Park, Seung-Jung Park
Aims: It is not clearly elucidated how the fusion technique improves the accuracy of endothelial shear stress (ESS) prediction, in comparison with that of three-dimensional (3D) quantitative coronary angiography (QCA) alone. We aimed to evaluate the difference in geometric measurements and haemodynamic estimation between 3D QCA and a 3D fusion model combining 3D QCA and optical coherence tomography (OCT). Methods and results: Computational fluid dynamics was assessed in the coronary models of 20 patients...
September 25, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29027737/an-optical-coherence-tomography-study-of-neointimal-morphology-and-strut-coverage-at-different-time-intervals-from-implantation-of-biodegradable-polymer-coated-sirolimus-eluting-stents
#10
Jacek Legutko, Robert J Gil, Pawel E Buszman, Grzegorz L Kaluza, Gary S Mintz, Tomasz Roleder, Marek Krol, Roman Wojdyla, Tomasz Pawlowski, Michal Brzezinski, Marek Kondys, Bartosz Skwarna, Jacek Jakala, Wojciech Zasada, Lukasz Partyka, Dariusz Dudek
OBJECTIVES: The aim of the study was to capture the evolution of neointima after implantation of a biodegradable polymer-coated, sirolimus-eluting, cobalt-chromium coronary stent system (BP-DES). BACKGROUND: Optical coherence tomography (OCT) suggests that in-stent neointimal morphology influences clinical outcomes after DES implantation. METHODS: Sixty patients treated with single BP-DES implantation were examined by quantitative coronary angiography (QCA) and OCT at 3, 6, and 12-month follow-up...
October 13, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29021434/effectiveness-of-bare-metal-stent-implantation-for-the-treatment-of-coronary-artery-aneurysm-a-multimodality-imaging-evaluation
#11
Yasuaki Hada, Hiroyuki Fujii, Masato Shimizu, Noriyoshi Yamawake, Mitsuhiro Nishizaki
Coronary artery aneurysm (CAA) after sirolimus-eluting stent (SES) implantation is one of the most troublesome problems associated with first-generation drug-eluting stents. However, the natural course and standard therapy of CAA has been unknown. A 49-year-old man underwent SES implantation for the left anterior descending artery. Follow-up coronary angiography (CAG) revealed CAA in the SES. We performed bare metal stent (BMS) implantation for treatment of CAA. Ten months after the BMS implantation, the size of the CAA had diminished, and a very thin layer of endothelium on the BMS was observed by optical coherence tomography...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29020287/optical-coherence-tomography-or-intravascular-ultrasound-to-optimize-coronary-stent-implantation
#12
Fernando Alfonso, Francesco Prati
No abstract text is available yet for this article.
July 25, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29016632/radial-artery-neointimal-hyperplasia-after-transradial-pci-serial-optical-coherence-tomography-volumetric-study
#13
Petr Kala, Jan Kanovsky, Tereza Novakova, Roman Miklik, Otakar Bocek, Martin Poloczek, Petr Jerabek, Lenka Prymkova, Tomas Ondrus, Jiri Jarkovsky, Milan Blaha, Gary S Mintz
AIMS: Transradial catheterization (TRC) is a dominant access site for coronary catheterization and percutaneous coronary interventions (PCI) in many centers. Previous studies reported higher intimal thickness of the radial artery (RA) wall in patients with a previous history of TRC. In this investigation the aim was to assess the intimal changes of RA using the optical coherence tomography (OCT) intravascular imaging in a serial manner. METHODS AND RESULTS: 100 patients with the diagnosis of non-ST-elevation myocardial infarction (nSTEMI) treated by PCI were enrolled (6 patients were excluded from this analysis because of occluded RA at follow-up [2 patients] and insufficient quality of OCT images [4 patients])...
2017: PloS One
https://www.readbyqxmd.com/read/28993001/absence-of-adventitial-vasa-vasorum-formation-at-the-coronary-segment-with-myocardial-bridge-an-optical-coherence-tomography-study
#14
Kensuke Nishimiya, Yasuharu Matsumoto, Hongxin Wang, Zhonglie Piao, Kazuma Ohyama, Hironori Uzuka, Kiyotaka Hao, Ryuji Tsuburaya, Jun Takahashi, Kenta Ito, Hiroaki Shimokawa
BACKGROUND: Myocardial bridge (MB) is a myocardial bundle through which coronary segment tunnels and could compress coronary arteries causing myocardial ischemia. However, the characteristic structural findings of MB remain to be fully elucidated. Recently, we demonstrated that optical coherence tomography (OCT) enables us to visualize adventitial vasa vasorum (VV) formation in humans. In this study, we examined adventitial VV formation at the coronary segment with MB in humans using OCT...
October 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28979905/the-role-of-intracoronary-imaging-in-acute-coronary-syndromes-oct-in-focus
#15
REVIEW
Ahmad Samir, Ahmed ElGuindy
Optical coherence tomography (OCT) has emerged as a powerful intravascular imaging modality in recent years. The introduction of frequency-domain OCT has simplified the procedure and enabled its safe utilisation in different clinical settings including acute coronary syndromes, where it can determine the mechanism of plaque disruption, thrombus burden, and guide percutaneous coronary intervention. In patients presenting with stent failure (stent thrombosis and instent restenosis), OCT can also be very useful in determining the underlying mechanism and guiding therapy thereafter...
December 30, 2016: Global Cardiology Science & Practice
https://www.readbyqxmd.com/read/28965166/comparative-assessment-of-three-drug-eluting-stents-with-different-platforms-but-with-the-same-biodegradable-polymer-and-the-drug-based-on-quantitative-coronary-angiography-and-optical-coherence-tomography-at-12-month-follow-up
#16
Robert J Gil, Jacek Bil, Jacek Legutko, Tomasz Pawłowski, Katarzyna E Gil, Dariusz Dudek, Ricardo A Costa
The aim of this study was to compare neointima proliferation in three drug-eluting stents (DES) produced by the same company (Balton, Poland) which are covered with a biodegradable polymer and elute sirolimus (concentration: 1.0 and 1.2 µg/mm(2)), but have different stent platforms and strut thickness: stainless steel Prolim(®) (115 µm) and BiOSS LIM(®) (120 µm) and cobalt-chromium Alex(®) (70 µm). We analyzed data of patients with quantitative coronary angiography (QCA) and optical coherence tomography (OCT) at 12 months from BiOSS LIM Registry, Prolim Registry and Alex OCT clinical trial...
September 30, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28957119/simultaneous-label-free-multispectral-fluorescence-lifetime-imaging-and-optical-coherence-tomography-using-a-double-clad-fiber
#17
Benjamin E Sherlock, Jennifer E Phipps, Julien Bec, Laura Marcu
We present a novel fiber-based imaging platform that allows simultaneous fluorescence lifetime imaging (FLIm) and optical coherence tomography (OCT) using a double-clad fiber. This platform acquires co-registered images showing structural and compositional contrast in unlabeled biological samples by scanning the fiber tip across the sample surface. In this Letter, we report a characterization of each modality and show examples of co-registered FLIm and OCT images acquired from a lemon segment and a section of human coronary artery...
October 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28943494/association-between-coronary-atherosclerosis-progression-and-in-stent-neoatherosclerosis-in-patients-with-st-elevation-myocardial-infarction-at-5-years-follow-up
#18
Giulia Paoletti, Josep Gomez-Lara, Salvatore Brugaletta, Marcos Ñato, Rafael Romaguera, Gerard Roura, José-Luis Ferreiro, Luis Teruel, Montserrat Gracida, Luis Ortega-Paz, Joan-Antoni Gomez-Hospital, Manel Sabate, Angel Cequier
AIMS: To investigate the association between in-stent neoatherosclerosis (NA) and atherosclerosis progression (AP) in non-culprit segments in patients with ST-elevation myocardial infarction at 5 years. METHODS AND RESULTS: Sixty-two out of 169 consecutive patients included in the EXAMINATION study underwent optical coherence tomography (OCT) at 5 years. NA plaques were observed in 13 (21.0%), signal-rich bands (SRB) in 22 (35.5%) and AP in 11 (17.7%). NA plaques were more frequently observed in patients treated with two stents (53...
September 26, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28940997/real-time-optical-coherence-tomography-coregistration-with-angiography-in-percutaneous-coronary-intervention-impact-on-physician-decision-making-the-optico-integration-study
#19
David M Leistner, Matthias Riedel, Lisa Steinbeck, Barbara E Stähli, Georg M Fröhlich, Alexander Lauten, Carsten Skurk, Hans-Christian Mochmann, Laura Lübking, Ursula Rauch-Kröhnert, Renate B Schnabel, Dirk Westermann, Stefan Blankenberg, Ulf Landmesser
AIMS: Intracoronary optical coherence tomography (OCT) imaging allows for high-resolution characterization of coronary lesions. Difficulties in matching cross-sectional OCT-images with angiographic lesion localization may limit optimal clinical utilization. We sought to prospectively assess the impact of a novel system of real-time OCT coregistration with angiography (ACR) on physician decision-making during percutaneous coronary interventions (PCI). METHODS AND RESULTS: Strategy for PCI (stent - length, - diameter, - strategy, landing zone) and PCI-optimization (stent-malappostion, -underexpansion, edge-dissections, geographical mismatch) was prospectively assessed in 50 patients with 58 coronary lesions after (I) angiography, (II) OCT imaging, and (III) ACR...
September 20, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28935079/effect-of-post-dilatation-following-primary-pci-with-everolimus-eluting-bioresorbable-scaffold-versus-everolimus-eluting-metallic-stent-implantation-an-angiographic-and-optical-coherence-tomography-trofi%C3%A2-ii%C3%A2-substudy
#20
Kyohei Yamaji, Salvatore Brugaletta, Manel Sabaté, Andrés Iñiguez, Lisette Okkels Jensen, Angel Cequier, Sjoerd H Hofma, Evald Høj Christiansen, Maarten Suttorp, Gerrit Anne van Es, Yohei Sotomi, Yoshinobu Onuma, Patrick W Serruys, Stephan Windecker, Lorenz Räber
OBJECTIVES: This study sought to investigate the effect of post-dilatation on angiographic and intracoronary imaging parameters in the setting of primary percutaneous coronary intervention comparing the everolimus-eluting bioresorbable scaffold (BRS) with the everolimus-eluting metallic stent (EES). BACKGROUND: Routine post-dilatation of BRS has been suggested to improve post-procedural angiographic and subsequent device-related clinical outcomes. METHODS: In the ABSORB STEMI TROFI II trial, 191 patients with ST-segment elevation myocardial infarction were randomly assigned to treatment with BRS (n = 95) or EES (n = 96)...
September 25, 2017: JACC. Cardiovascular Interventions
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