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Intravascular optical coherence tomography

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https://www.readbyqxmd.com/read/28917678/optical-frequency-domain-imaging-versus-intravascular-ultrasound-in-percutaneous-coronary-intervention-opinion-trial-results-from-the-opinion-imaging-study
#1
Hiromasa Otake, Takashi Kubo, Hachidai Takahashi, Toshiro Shinke, Takayuki Okamura, Kiyoshi Hibi, Gaku Nakazawa, Yoshihiro Morino, Junya Shite, Tetsuya Fusazaki, Ken Kozuma, Tetsuya Ioji, Hideaki Kaneda, Takashi Akasaka
OBJECTIVES: We sought to clarify how intravascular ultrasound (IVUS) and optical coherence tomography affect percutaneous coronary intervention (PCI) with current-generation drug-eluting stents in a pre-specified substudy of the OPINION (OPtical frequency domain imaging versus INtravascular ultrasound in percutaneous coronary interventiON) trial, a multicenter, prospective, randomized, noninferiority trial comparing optical frequency domain imaging (OFDI)-guided PCI with IVUS-guided PCI...
September 9, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28901053/tissue-characterization-with-depth-resolved-attenuation-coefficient-and-backscatter-term-in-intravascular-optical-coherence-tomography-images
#2
Shengnan Liu, Yohei Sotomi, Jeroen Eggermont, Gaku Nakazawa, Sho Torii, Takeshi Ijichi, Yoshinobu Onuma, Patrick W Serruys, Boudewijn P F Lelieveldt, Jouke Dijkstra
An important application of intravascular optical coherence tomography (IVOCT) for atherosclerotic tissue analysis is using it to estimate attenuation and backscatter coefficients. This work aims at exploring the potential of the attenuation coefficient, a proposed backscatter term, and image intensities in distinguishing different atherosclerotic tissue types with a robust implementation of depth-resolved (DR) approach. Therefore, the DR model is introduced to estimate the attenuation coefficient and further extended to estimate the backscatter-related term in IVOCT images, such that values can be estimated per pixel without predefining any delineation for the estimation...
September 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28893795/serial-3-vessel-optical-coherence-tomography-and-intravascular-ultrasound-analysis-of-changing-morphologies-associated-with-lesion-progression-in-patients-with-stable-angina-pectoris
#3
Myong Hwa Yamamoto, Kennosuke Yamashita, Mitsuaki Matsumura, Akiko Fujino, Masaru Ishida, Seitarou Ebara, Toshitaka Okabe, Shigeo Saito, Koichi Hoshimoto, Kisaki Amemiya, Tadayuki Yakushiji, Naoei Isomura, Hiroshi Araki, Chiaki Obara, Thomas McAndrew, Masahiko Ochiai, Gary S Mintz, Akiko Maehara
BACKGROUND: Optical coherence tomographic (OCT) morphologies associated with lesion progression are not well studied. The aim of this study was to determine the morphological change for untreated lesion progression using both OCT and intravascular ultrasound (IVUS). METHODS AND RESULTS: We used baseline and 8-month follow-up 3-vessel OCT and IVUS to assess 127 nonculprit lesions (IVUS plaque burden ≥40%) in 45 patients with stable angina after target lesion treatment...
September 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28867010/mid-term-clinical-outcomes-of-absorb-bioresorbable-vascular-scaffold-versus-everolimus-eluting-stent-for-coronary-bifurcation-lesions
#4
Toru Naganuma, Hiroyoshi Kawamoto, Vasileios F Panoulas, Azeem Latib, Akihito Tanaka, Satoru Mitomo, Neil Ruparelia, Richard J Jabbour, Alaide Chieffo, Mauro Carlino, Matteo Montorfano, Antonio Colombo
BACKGROUND: Data regarding bioresorbable vascular scaffolds (BVS) use in coronary bifurcation lesions are limited. The aim of this study was to compare mid-term clinical outcomes of all-comer patients treated with BVS versus everolimus-eluting stents (EES) for bifurcation lesions. METHODS: A total of 351 non-left-main bifurcation lesions in 323 all-comer patients were treated either with BVS (166 bifurcations in 147 patients) or EES (185 bifurcations in 176 patients)...
November 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28855886/advanced-imaging-of-intracranial-atherosclerosis-lessons-from-interventional-cardiology
#5
Davor Pavlin-Premrl, Rahul Sharma, Bruce C V Campbell, J Mocco, Nicholas L Opie, Thomas J Oxley
Intracranial atherosclerosis is a major cause of ischemic stroke. Patients with a high degree of stenosis have a significant rate of stroke despite medical therapy. Two randomized trials of stenting have failed to show benefit. Improving periprocedural complication rates and patient selection may improve stenting outcomes. Fractional flow reserve (FFR), intravascular ultrasound (IVUS), and optical coherence tomography (OCT) are intravascular imaging techniques employed to improve patient selection and stent placement in interventional cardiology...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28834786/intravascular-imaging-of-coronary-artery-disease-recent-progress-and-future-directions
#6
Dorota Ochijewicz, Mariusz Tomaniak, Lukasz Koltowski, Adam Rdzanek, Arkadiusz Pietrasik, Janusz Kochman
: Although coronary angiography represents a well established diagnostic modality for percutaneous coronary intervention guidance, recent intravascular imaging techniques, such as intravascular ultrasound, optical coherence tomography (OCT) and near-infrared spectroscopy offer advantages on top of angiography, enhancing the efficacy of lesion evaluation and potentially optimizing the acute and long-term percutaneous coronary intervention outcomes.In addition, recently new generation imaging options have emerged, such as high-definition intravascular ultrasound, polarization-sensitive OCT, intravascular photoacoustic imaging and ultrafast heartbeat OCT...
October 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28831995/intravascular-imaging-in-coronary-artery-disease
#7
REVIEW
Gary S Mintz, Giulio Guagliumi
Although it is the method used by most interventional cardiologists to assess the severity of coronary artery disease and guide treatment, coronary angiography has many known limitations, particularly the fact that it is a lumenogram depicting foreshortened, shadowgraph, planar projections of the contrast-filled lumen rather than imaging the diseased vessel itself. Intravascular imaging-intravascular ultrasound and more recently optical coherence tomography-provide a tomographical or cross-sectional image of the coronary arteries...
August 19, 2017: Lancet
https://www.readbyqxmd.com/read/28830582/differences-in-vascular-response-between-balloon-overstretch-and-stent-overexpansion-in-nonatherosclerotic-porcine-coronary-arteries
#8
Yoshiaki Mitsutake, Jörg Reifart, Wook Bum Pyun, Jennifer K Lyons, Tobias Deuse, Sonja Schrepfer, Fumiaki Ikeno
Which preclinical models are best suited for restenosis research remains uncertain. Here we compared the restenotic responses after balloon or stent overstretch injury in a porcine coronary artery. A total of 30 coronary lesions in 5 pigs were treated by balloon overdilatation or oversized stent implantation at various balloon-to-artery (B:A) ratios. Four weeks later, the lesions were examined in vivo by using coronary angiography, intravascular ultrasound, and optical coherence tomography (OCT). At follow-up, the lumen area stenosis and plaque burden at the minimal lumen area site were greater in stented sites than in balloon injury site (lumen area stenosis, 21...
August 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28797408/in-vivo-calcium-detection-by-comparing-optical-coherence-tomography-intravascular-ultrasound-and-angiography
#9
Xiao Wang, Mitsuaki Matsumura, Gary S Mintz, Tetsumin Lee, Wenbin Zhang, Yang Cao, Akiko Fujino, Yongqing Lin, Eisuke Usui, Yoshihisa Kanaji, Tadashi Murai, Taishi Yonetsu, Tsunekazu Kakuta, Akiko Maehara
OBJECTIVES: The aim of this study was to evaluate optical coherence tomography (OCT) and intravascular ultrasound (IVUS) versus coronary angiography in the assessment of target lesion calcification and its effect on stent expansion. BACKGROUND: IVUS is more sensitive than angiography in the detection of coronary artery calcium, but the relationship among IVUS, OCT, and angiography has not been studied. METHODS: Overall, 440 lesions (440 patients with stable angina) underwent OCT- and IVUS-guided stent implantation...
August 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28764604/optical-coherence-tomography-to-guide-percutaneous-treatment-of-coronary-bifurcation-disease
#10
Mathias Wolfrum, Giovanni Luigi De Maria, Adrian P Banning
Cardiovascular disease remains the most common cause of death worldwide. Enormous progress in the technology and applicability of percutaneous techniques to treat obstructive coronary heart disease has been made, and the number of percutaneous coronary interventions (PCI) is increasing. Coronary bifurcations are involved in a substantial number of PCIs and despite recent advances, bifurcation PCI remains a challenge in terms of immediate success and long-term outcome. Angiography has a limited capacity for showing important features of the 3 dimensional coronary vessel anatomy, position of stent struts and exact wire positions and is therefore suboptimal for guiding bifurcation PCI...
August 9, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28761388/coronary-stents-and-vascular-response-to-implantation-literature-review
#11
REVIEW
Marta Francesca Brancati, Francesco Burzotta, Carlo Trani, Ornella Leonzi, Claudio Cuccia, Filippo Crea
Drug-eluting stents (DESs) have minimized the limitations of bare-metal stents (BMSs) after percutaneous coronary interventions. Nevertheless, serious concerns remain about possible late complications of stenting, such as stent thrombosis (ST) and in-stent restenosis (ISR), although the introduction of second-generation DESs seems to have softened the phenomenon, compared to the first-generation ones. ST is a potentially catastrophic event, which has been markedly reduced by optimization of stent implantation, novel stent designs, and dual antiplatelet therapy...
2017: Pragmatic and Observational Research
https://www.readbyqxmd.com/read/28740643/optical-coherence-tomography-vs-intravascular-ultrasound-guided-percutaneous-coronary-intervention
#12
EDITORIAL
Lorenz Räber, Yasushi Ueki
No abstract text is available yet for this article.
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28734913/uncovered-culprit-plaque-ruptures-in-patients-with-st-segment-elevation-myocardial-infarction-assessed-by-optical-coherence-tomography-and-intravascular-ultrasound-with-imap
#13
Mikkel Hougaard, Henrik Steen Hansen, Per Thayssen, Lisbeth Antonsen, Lisette Okkels Jensen
OBJECTIVES: This study assessed the incidence and course of healing of uncovered plaque ruptures (PR) following primary percutaneous coronary intervention. BACKGROUND: The infarct-related occlusion is frequently located at the lesion site with maximum thrombus burden, whereas the culprit PR may be situated more proximally or distally. METHODS: Uncovered PR in segments adjacent to the stent were identified by optical coherence tomography and intravascular ultrasound using iMap (Boston Scientific, Marlborough, Massachusetts) within 48 h and after 12 months...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28734911/plaque-rupture-in-coronary-atherosclerosis-is-associated-with-increased-plaque-structural-stress
#14
Charis Costopoulos, Yuan Huang, Adam J Brown, Patrick A Calvert, Stephen P Hoole, Nick E J West, Jonathan H Gillard, Zhongzhao Teng, Martin R Bennett
OBJECTIVES: The aim of this study was to identify the determinants of plaque structural stress (PSS) and the relationship between PSS and plaques with rupture. BACKGROUND: Plaque rupture is the most common cause of myocardial infarction, occurring particularly in higher risk lesions such as fibroatheromas. However, prospective intravascular ultrasound-virtual histology studies indicate that <10% higher risk plaques cause clinical events over 3 years, indicating that other factors also determine plaque rupture...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28729378/very-early-great-saphenous-vein-graft-aneurysm-treated-by-percutaneous-coronary-intervention-under-chromaflo-imaging-guidance
#15
Tetsuo Yamaguchi, Takamichi Miyamoto, Kandoh Kawahatsu, Toshihiro Nozato
A 73-year-old man, who had undergone coronary artery bypass grafting (CABG) 10 days prior, presented with a great saphenous vein graft aneurysm (SVGA). CT revealed the increasing size of the aneurysm. Since the SVGA occurred immediately after CABG and there were no other complications, the aneurysm was treated percutaneously. While intravascular ultrasonography (IVUS) and optical coherence tomography failed to detect the entry point, an IVUS catheter with the addition of ChromaFlo imaging clearly revealed the entry point, size and length of the SVGA...
July 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28724126/comparative-outcomes-after-percutaneous-coronary-intervention-among-black-and-white-patients-treated-at-us-veterans-affairs-hospitals
#16
Taisei Kobayashi, Thomas J Glorioso, Ehrin J Armstrong, Thomas M Maddox, Mary E Plomondon, Gary K Grunwald, Steven M Bradley, Thomas T Tsai, Stephen W Waldo, Sunil V Rao, Subhash Banerjee, Brahmajee K Nallamothu, Deepak L Bhatt, A Garvey Rene, Robert L Wilensky, Peter W Groeneveld, Jay Giri
Importance: Current comparative outcomes among black and white patients treated with percutaneous coronary intervention (PCI) in the Veterans Affairs (VA) health system are not known. Objective: To compare outcomes between black and white patients undergoing PCI in the VA health system. Design, Setting, and Participants: This study compared black and white patients who underwent PCI between October 1, 2007, and September 30, 2013, at 63 VA hospitals using data recorded in the VA Clinical Assessment, Reporting, and Tracking System for Cardiac Catheterization Laboratories (CART-CL) program...
September 1, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28720725/optical-coherence-tomography-findings-in-patients-with-coronary-stent-thrombosis-a-report-of-the-prevention-of-late-stent-thrombosis-by-an-interdisciplinary-global-european-effort-prestige-consortium
#17
Tom Adriaenssens, Michael Joner, Thea Godschalk, Nikesh Malik, Fernando Alfonso, Erion Xhepa, Dries De Cock, Kenichi Komukai, Tomohisa Tada, Javier Cuesta, Vasile Sirbu, Laurent J Feldman, Franz-Josef Neumann, Alison H Goodall, Ton Heestermans, Ian Buysschaert, Ota Hlinomaz, Ann Belmans, Walter Desmet, Jurrien M Ten Berg, Anthony H Gershlick, Steffen Massberg, Adnan Kastrati, Giulio Guagliumi, Robert Byrne
Background -Stent thrombosis (ST) is a serious complication following coronary stenting. Intravascular optical coherence tomography (OCT) may provide insights into mechanistic processes leading to ST. We performed a prospective, multicenter study to evaluate OCT findings in patients with ST. Methods -Consecutive patients presenting with ST were prospectively enrolled in a registry using a centralized telephone registration system. After angiographic confirmation of ST, OCT imaging of the culprit vessel was performed with frequency domain OCT...
July 18, 2017: Circulation
https://www.readbyqxmd.com/read/28714527/multimodality-imaging-of-intermediate-lesions-data-from-ffr-oct-nirs-ivus
#18
Dariusz Biały, Magdalena Wawrzyńska, Jacek Arkowski, Marcin Rogała, Klaudia Proniewska, Wojciech Wańha, Wojciech Wojakowski, Tomasz Roleder
BACKGROUND: Fractional flow reserve (FFR) assesses a functional impact of the atheroma on the myocardial ischemia, but it does not take into account the morphology of the lesion. Previous optical coherence tomography (OCT), intravascular ultrasound (IVUS) and near infrared spectroscopy (NIRS) studies presented their potential to detect vulnerable plaque, which is not possible by FFR assessment. With the following study, the intermediate lesions were assessed by FFR, OCT and combined NIRS-IVUS imaging to identify plaque vulnerability...
July 17, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28710605/current-clinical-applications-of-coronary-optical-coherence-tomography
#19
REVIEW
Teruyoshi Kume, Shiro Uemura
Optical coherence tomography (OCT) is an intra-coronary diagnostic technique that provides detailed imagings of blood vessels in the current cardiac catheterization laboratory. The higher resolution of OCT often provides superior delineation of each structure compared with intravascular ultrasound (IVUS), and it can reliably visualize the microstructure of normal and diseased arteries. The capabilities of OCT are well suited for the identification of calcified plaque and neointima formation after stent implantation...
July 14, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28707349/assessment-of-bioresorbable-scaffold-with-a-novel-high-definition-60%C3%A2-mhz-ivus-imaging-system-comparison-with-40-mhz-ivus-referenced-to-optical-coherence-tomography
#20
Kozo Okada, Hideki Kitahara, Yoshiaki Mitsutake, Shigemitsu Tanaka, Takumi Kimura, Paul G Yock, Peter J Fitzgerald, Fumiaki Ikeno, Yasuhiro Honda
BACKGROUND: In vivo assessment of bioresorbable scaffold (BRS) is of growing clinical interest. The novel 60MHz high-definition intravascular ultrasound (HD-IVUS) has been developed to overcome the limitations of conventional 40 MHz IVUS. This study aimed to evaluate the performance and limitations of 60 MHz HD-IVUS compared with 40 MHz IVUS with respect to polymeric-strut visualization, quantitative and qualitative analysis, and feasibility of high-speed pullback in the assessment of BRS...
July 14, 2017: Catheterization and Cardiovascular Interventions
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