1. Articles from Michael Joner

    1-24 of 36 1 2 »
    1. Mechanism of Drug-Eluting Absorbable Metal Scaffold Restenosis: A Serial Optical Coherence Tomography Study

      Mechanism of Drug-Eluting Absorbable Metal Scaffold Restenosis: A Serial Optical Coherence Tomography Study

      Background: The pathomechanisms underlying restenosis of the bioabsorbable sirolimus-eluting metallic scaffold (Magmaris) remain unknown. Using serial optical coherence tomography, we investigated causes of restenosis, including the contribution of late scaffold recoil versus neointimal hyperplasia. Methods: Patients enrolled in BIOSOLVE-II undergoing serial angiography and optical coherence tomography (post-intervention and follow-up: 6 months and/or 1 year) were analyzed. Patients were divided into 2 groups according to angiographic in-scaffold late lumen loss (LLL) <0.5 or ≥0.5 mm. End points were late absolute scaffold recoil and neointimal hyperplasia area as assessed by optical coherence tomography. Results: Serial data were available for ...

      Read Full Article
    2. Subintimal Versus Intraplaque Recanalization of Coronary Chronic Total Occlusions: Mid-Term Angiographic and OCT Findings From the ISAR-OCT-CTO Registry

      Subintimal Versus Intraplaque Recanalization of Coronary Chronic Total Occlusions: Mid-Term Angiographic and OCT Findings From the ISAR-OCT-CTO Registry

      Objectives The aim of this study was to compare angiographic and optical coherence tomography findings following subintimal as opposed to intraplaque recanalization of chronic total occlusions (CTOs). Background There is ongoing controversy regarding outcomes of intraplaque versus subintimal CTO recanalization. Methods Consecutive patients undergoing angiography and intravascular optical coherence tomography following CTO recanalization were included in the ISAR-OCT-CTO (Intracoronary Stenting and Angiographic Results - Optical Coherence Tomography for Chronic Total Occlusions) registry. The study endpoints were percent diameter stenosis and late lumen loss as well as rate of uncovered and malapposed struts. Independent correlates of uncovered and malapposed struts were assessed ...

      Read Full Article
    3. Clinical use of intracoronary imaging. Part 2: acute coronary syndromes, ambiguous coronary angiography findings, and guiding interventional decision-making: an expert consensus document of the European Association of Percutaneous Cardiovascular Intervent

      Clinical use of intracoronary imaging. Part 2: acute coronary syndromes, ambiguous coronary angiography findings, and guiding interventional decision-making: an expert consensus document of the European Association of Percutaneous Cardiovascular Intervent

      This consensus document is the second of two reports summarizing the views of an expert panel organized by the European Association of Percutaneous Cardiovascular Interventions (EAPCI) on the clinical use of intracoronary imaging including intravascular ultrasound (IVUS), optical coherence tomography (OCT), and near infrared spectroscopy (NIRS)-IVUS. Beyond guidance of stent selection and optimization of deployment, invasive imaging facilitates angiographic interpretation and may guide treatment in acute coronary syndrome. Intravascular imaging can provide additional important diagnostic information when confronted with angiographically ambiguous lesions and allows assessment of plaque morphology enabling identification of vulnerability characteristics. This second document focuses on useful ...

      Read Full Article
    4. First Report of Edge Vascular Response at 12 Months of Magmaris, A Second-Generation Drug-Eluting Resorbable Magnesium Scaffold, Assessed by Grayscale Intravascular Ultrasound, Virtual Histology, and Optical Coherence Tomography. A Biosolve-II Trial Sub-S

      First Report of Edge Vascular Response at 12 Months of Magmaris, A Second-Generation Drug-Eluting Resorbable Magnesium Scaffold, Assessed by Grayscale Intravascular Ultrasound, Virtual Histology, and Optical Coherence Tomography. A Biosolve-II Trial Sub-S

      Introduction and objective The edge vascular response (EVR) remains unknown in second generation drug-eluting Resorbable Magnesium Scaffold (RMS), such as Magmaris. The aim of the study was to evaluate tissue modifications in the RMS edges over time, assessed by different invasive imaging modalities. Methods The patients treated with the device were assessed by optical coherence tomography (OCT), grayscale intravascular ultrasound (IVUS), and virtual histology IVUS at baseline and 12 months. The EVR study performed a segment- and frame-level analysis of the 5 mm segments proximal and distal of the actual RMS. Results The segment-level grayscale IVUS (n = 10), virtual histology ...

      Read Full Article
    5. Clinical use of intracoronary imaging. Part 2: acute coronary syndromes, ambiguous coronary angiography findings, and guiding interventional decision-making: an expert consensus document of the European Association of Percutaneous Cardiovascular Intervent

      Clinical use of intracoronary imaging. Part 2: acute coronary syndromes, ambiguous coronary angiography findings, and guiding interventional decision-making: an expert consensus document of the European Association of Percutaneous Cardiovascular Intervent

      This consensus document is the second of two reports summarizing the views of an expert panel organized by the European Association of Percutaneous Cardiovascular Interventions (EAPCI) on the clinical use of intracoronary imaging including intravascular ultrasound (IVUS), optical coherence tomography (OCT), and near infrared spectroscopy (NIRS)-IVUS. Beyond guidance of stent selection and optimization of deployment, invasive imaging facilitates angiographic interpretation and may guide treatment in acute coronary syndrome. Intravascular imaging can provide additional important diagnostic information when confronted with angiographically ambiguous lesions and allows assessment of plaque morphology enabling identification of vulnerability characteristics. This second document focuses on useful ...

      Read Full Article
    6. Optical coherence tomography tissue coverage and characterization with grey-scale signal intensity analysis after bifurcation stenting with new generation bioabsorbable polymer drug-eluting stent

      Optical coherence tomography tissue coverage and characterization with grey-scale signal intensity analysis after bifurcation stenting with new generation bioabsorbable polymer drug-eluting stent

      Purpose Bifurcation stenting is thought to be associated with delayed healing and a subsequent risk of stent failure. The aim of this study was to further evaluate healing of thin-strut bioabsorbable polymer everolimus-eluting stents (EES) post bifurcation stenting by optical coherence tomography (OCT) including grey-scale signal intensity (GSI) analysis. Methods Patients receiving bifurcation stenting with a planned two-stent approach using EES with OCT follow-up at 3–6 months post-stenting were included in this study. Morphometric analysis of contiguous cross-sections was performed at 1 mm longitudinal intervals within the stented segment. GSI analysis of neointimal regions of interest (ROI) overlying stent ...

      Read Full Article
    7. Qualitative and quantitative neointimal characterization by optical coherence tomography in patients presenting with in-stent restenosis

      Qualitative and quantitative neointimal characterization by optical coherence tomography in patients presenting with in-stent restenosis

      Aims To describe optical coherence tomography (OCT) findings in patients with in-stent restenosis (ISR) and determine predictors of neointimal patterns and neoatherosclerosis. Methods and results Patients undergoing OCT prior to PCI for ISR in three European centres were included. Analyses were performed in a core laboratory. Qualitative and quantitative [gray-scale signal intensity (GSI)] neointima analyses were performed on a per quadrant basis. A total of 107 patients were included. Predominantly homogeneous lesions included 4.5% (0.0–14.3) non-homogeneous quadrants, while predominantly non-homogeneous ones included 28.1% (20.3–37.5) homogeneous quadrants. Mean GSI values differed significantly between ...

      Read Full Article
    8. Optical coherence tomography revisited: imaging and imagination

      Optical coherence tomography revisited: imaging and imagination

      Optical coherence tomography (OCT) was introduced into cardiovascular imaging in 1997 1 , emerging as a spin-off from an original scientific invention within the field of ophthalmology to enable imaging of retinal microstructures including arterioles and to facilitate detection of early degenerative changes of retinopathies. Consequently, OCT was praised as being a ground-breaking imaging technology which provides a far superior resolution as compared to the already established ultrasound-based imaging system (intravascular ultrasound [IVUS]). As such, it provides high-resolution tomographic images (10-20 µm), which enable recognition of atherosclerotic plaque patterns 2 , 3 , and can be used to identify high-risk lesions including their ...

      Read Full Article
    9. Clinical use of intracoronary imaging. Part 1: guidance and optimization of coronary interventions. An expert consensus document of the European Association of Percutaneous Cardiovascular Interventions

      Clinical use of intracoronary imaging. Part 1: guidance and optimization of coronary interventions. An expert consensus document of the European Association of Percutaneous Cardiovascular Interventions

      his Consensus Document is the first of two reports summarizing the views of an expert panel organized by the European Association of Percutaneous Cardiovascular Interventions (EAPCI) on the clinical use of intracoronary imaging including intravascular ultrasound (IVUS) and optical coherence tomography (OCT). The first document appraises the role of intracoronary imaging to guide percutaneous coronary interventions (PCIs) in clinical practice. Current evidence regarding the impact of intracoronary imaging guidance on cardiovascular outcomes is summarized, and patients or lesions most likely to derive clinical benefit from an imaging-guided intervention are identified. The relevance of the use of IVUS or OCT prior ...

      Read Full Article
    10. Neoatherosclerosis in Patients With Coronary Stent Thrombosis: Findings From Optical Coherence Tomography Imaging (A Report of the PRESTIGE Consortium)

      Neoatherosclerosis in Patients With Coronary Stent Thrombosis: Findings From Optical Coherence Tomography Imaging (A Report of the PRESTIGE Consortium)

      Objectives The purpose of this study was to assess neoatherosclerosis in a registry of prospectively enrolled patients presenting with stent thrombosis using optical coherence tomography . Background In-stent neoatherosclerosis was recently identified as a novel disease manifestation of atherosclerosis after coronary stent implantation. Methods Angiography and intravascular optical coherence tomography were used to investigate etiologic factors of neoatherosclerosis in patients presenting with stent thrombosis >1 year after implantation (very late stent thrombosis [VLST]). Clinical data were collected according to a standardized protocol. Optical coherence tomographic acquisitions were analyzed in a core laboratory. Cox regression analysis was performed to identify factors associated ...

      Read Full Article
    11. Very late scaffold thrombosis: insights from optical coherence tomography and histopathology

      Very late scaffold thrombosis: insights from optical coherence tomography and histopathology

      A 79-year-old male patient had a 2.5×12 mm bioresorbable vascular scaffold (Absorb™ BVS; Abbott Vascular, Santa Clara, CA, USA) implanted in the setting of the RIBS VI study protocol for in-stent restenosis of a 3×9 mm bare metal stent (AVE S670; Medtronic, Minneapolis, MN, USA) in January 2015, at which time point the patient presented with stable angina and positive exercise stress test (index procedure). The Absorb BVS was implanted with predilatation at 20 atmospheres (atm) accompanied by post-dilatation with a non-compliant balloon (2.5×10 mm) at 26 atm. The patient was maintained on dual antiplatelet ...

      Read Full Article
    12. Randomised comparison of vascular response to biodegradable polymer sirolimus eluting and permanent polymer everolimus eluting stents: An optical coherence tomography study

      Randomised comparison of vascular response to biodegradable polymer sirolimus eluting and permanent polymer everolimus eluting stents: An optical coherence tomography study

      Background Drug-eluting stents with biodegradable polymer coatings have shown promising outcomes in randomised studies. Methods We compared neointimal healing patterns including strut coverage and assessed neointimal maturity using a novel algorithm in coronary lesions treated with sirolimus-eluting stents with biodegradable polymer coating (BP-SES) or everolimus eluting stents with permanent polymer coating (PP-EES) using optical coherence tomography after 6 months. Results A total of 39 patients were randomised to BP-SES ( n = 19) or PP-EES ( n = 20) for the treatment of coronary lesions. Of those, 29 patients (14 BP-SES and 15 PP-EES) underwent optical coherence tomography (OCT) and angiography at 6-month follow-up ...

      Read Full Article
    13. Very Late Scaffold Thrombosis: Insights from Optical Coherence Tomography and Histopathology

      Very Late Scaffold Thrombosis: Insights from Optical Coherence Tomography and Histopathology

      Aims: to investigate and understand the mechanisms of very late scaffold thrombosis 13 months following implantation in the setting of bare metal in-stent restenosis. Methods and results: we collected consecutive angiography, optical coherence tomography and full autopsy evaluation in a 79-year old patients presenting with cardiogenic shock and undergoing rescue PCI after suffering very late scaffold thrombosis. Combined assessment of angiography, optical coherence tomography and histopathology revealed heterogenous vascular healing 13 months following implantation of a bioresorbable vascular scaffold with presence of scaffold struts fully integrated into neointimal tissue while others remained uncovered and malapposed. Furthermore, plaque rupture within the ...

      Read Full Article
    14. Report of an ESC-EAPCI Task Force on the evaluation and use of bioresorbable scaffolds for percutaneous coronary intervention: executive summary

      Report of an ESC-EAPCI Task Force on the evaluation and use of bioresorbable scaffolds for percutaneous coronary intervention: executive summary

      BRS require careful lesion assessment, to determine the need and extent of lesion preparation, as well as to select the appropriate size and length of the device. The use of pre-and post-procedural intracoronary imaging (Intravascular ultrasound, optical coherence tomography), as well as online quantitative coronary angiography, is encouraged to optimize device implantation. The use of BRS in heavily calcified vessels is strongly discouraged. Bioresorbable scaffolds should be avoided in stenoses with reference diameter smaller than 2.5 mm and in ostial lesions.

      Read Full Article
    15. 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

      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

      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. Clinical data were collected according to a standardized protocol. OCT acquisitions were analyzed at a core laboratory. Dominant and contributing findings were adjudicated by an imaging ...

      Read Full Article
    16. The REMEDEE-OCT Study : An Evaluation of the Bioengineered COMBO Dual-Therapy CD34 Antibody–Covered Sirolimus-Eluting Coronary Stent Compared With a Cobalt-Chromium Everolimus-Eluting Stent in Patients With Acute Coronary Syndromes: Insights From Optical

      The REMEDEE-OCT Study : An Evaluation of the Bioengineered COMBO Dual-Therapy CD34 Antibody–Covered Sirolimus-Eluting Coronary Stent Compared With a Cobalt-Chromium Everolimus-Eluting Stent in Patients With Acute Coronary Syndromes: Insights From Optical

      Objectives The aim of the present study was to evaluate vascular healing of the bioengineered COMBO Dual Therapy Stent compared with a cobalt-chromium (CoCr) everolimus-eluting stent (EES) as assessed by optical coherence tomography in patients with acute coronary syndromes. Background CD34+ cells promote endothelial repair after vascular injury. The bioengineered COMBO Dual Therapy Stent combines CD34+ cell–capturing technology with abluminal sirolimus release, but more data from clinical studies evaluating the vascular response are needed. Methods In a prospective randomized multicenter clinical trial, 60 patients with acute coronary syndromes were randomized 1:1 to COMBO or CoCr EES implantation. The ...

      Read Full Article
    17. Histopathological Differential Diagnosis of Optical Coherence Tomographic Image Interpretation After Stenting

      Histopathological Differential Diagnosis of Optical Coherence Tomographic Image Interpretation After Stenting

      Objectives The aim of this study was to identify histological features that correlate with terms commonly used to describe optical coherence tomographic (OCT) and optical frequency-domain imaging (OFDI) images of stented vessels, by means of a histopathological validation study using stented human coronary arteries. Background OCT imaging and OFDI are used to evaluate vascular responses to stent implantation. Descriptive terms such as “peristrut low attenuation” and “heterogeneous” have been used to describe neointimal characteristics that may have clinical relevance. However, only limited histopathological correlations are available. Methods Using the CVPath stent registry, 19 cases were identified in whom implantation duration ...

      Read Full Article
    18. Optical coherence tomography in drug-eluting stent restenosis: a technique in need of a strategy

      Optical coherence tomography in drug-eluting stent restenosis: a technique in need of a strategy

      Despite the high anti-restenotic efficacy of contemporary percutaneous interventional techniques, a substantial number of patients who undergo percutaneous coronary intervention (PCI) still present with restenosis. Despite iterations of devices– from plain balloon angioplasty to bare metal stenting (BMS) to drug-eluting stent (DES) therapy – have granted a progressive decline in the rate of this complication, in-stent restenosis remains a critical issue encountered in clinical practice. Owing to the overall increase in the use of DES, the number of patients presenting with DES restenosis is not insignificant in absolute terms. When DES restenosis occurs, it represents a challenging clinical entity in terms ...

      Read Full Article
    19. Optimization of coronary optical coherence tomography imaging using the attenuation-compensated technique: a validation study

      Optimization of coronary optical coherence tomography imaging using the attenuation-compensated technique: a validation study

      Purpose To optimize conventional coronary optical coherence tomography (OCT) images using the attenuation-compensated technique to improve identification of plaques and the external elastic lamina (EEL) contour. Method The attenuation-compensated technique was optimized via manipulating contrast exponent C, and compression exponent N, to achieve an optimal contrast and signal-to-noise ratio (SNR). This was applied to 60 human coronary lesions (38 native and 22 stented) ex vivo conventional coronary OCT images acquired from heart autopsies of 10 patients and matching histology was available as reference. Three independent reviewers assessed the conventional and attenuation-compensated OCT images blindly for plaque characteristics and EEL detection ...

      Read Full Article
    20. Malapposition: is it a major cause of stent thrombosis?

      Malapposition: is it a major cause of stent thrombosis?

      Stent thrombosis (ST) is a devastating complication associated with a high morbidity and mortality in patients who have undergone percutaneous coronary intervention (PCI) for coronary heart disease (CHD). In-hospital mortalities of patients suffering from ST have been reported to be as high as 7.9% for acute ST (AST; occurring <24 h after PCI) and subacute ST (SAST; occurring within 30 days after PCI), 3.8% for late ST (LST; occurring within the first year after PCI), and 3.6% for very late ST (VLST; occurring 1 year after PCI). 1 Recently, longer duration (30 months) of dual antiplatelet therapy ...

      Read Full Article
    21. Molecular multimodality imaging: has a long-standing dream come true?

      Molecular multimodality imaging: has a long-standing dream come true?

      Intravascular imaging has incrementally gained in clinical relevance in recent years. First triggered by the introduction of intravascular ultrasound >25 years ago, 1 interest has recently been augmented by the widespread implementation of optical coherence tomography (OCT) in cardiac catheterization laboratories. OCT, because of its outstanding spatial resolution in the range of 10–20 μm relative to comparative invasive and non-invasive imaging modalities, has been charged with great expectations regarding its potential to advance our capabilities in detecting and characterizing vascular pathologies. In particular for patients undergoing stent implantation, OCT has been put forward as a promising tool to assess ...

      Read Full Article
    22. The Mystery of Spotty Calcification Can We Solve It by Optical Coherence Tomography?

      The Mystery of Spotty Calcification Can We Solve It by Optical Coherence Tomography?

      Spotty calcification has recently been introduced as a marker of plaque vulnerability in patients presenting with acute coronary syndrome undergoing invasive and noninvasive coronary imaging, 1 and it has been suggested to be of predictive value for percent atheroma volume with greater progression. 2 Several pathological and clinical studies applying computed tomography (CT) and intravascular ultrasound (IVUS) demonstrated that spotty calcification is more frequently observed in lesions with plaque rupture compared with stable plaque. 3 , 4 Recently, optical coherence tomography (OCT) has emerged as the premier intracoronary imaging technology with a higher resolution (10–20 μm) than IVUS (100–200 ...

      Read Full Article
    23. Neoatherosclerosis: mirage of an ancient illness or genuine disease condition?

      Neoatherosclerosis: mirage of an ancient illness or genuine disease condition?

      In-stent neoatherosclerosis has become the darling of the interventional cardiology community and is blamed for most stent thrombosis (ST) occurring late after drug-eluting stent (DES) implantation. Neoatherosclerosis accounted for only 33% of late and very late ST at autopsy following implantation of first-generation DES. 1 However, the clinical prevalence of neoatherosclerosis and its percentage of cases presenting with late and very late ST remains unknown. In the current issue of the journal, Taniwaki et al . propose a significant and biologically relevant association between the presence of in-stent neoatherosclerosis and the progression of native atherosclerosis in a cohort of 88 patients ...

      Read Full Article
    24. Neoatherosclerosis: overview of histopathologic findings and implications for intravascular imaging assessment

      Neoatherosclerosis: overview of histopathologic findings and implications for intravascular imaging assessment

      Despite the reduction in late thrombotic events with newer-generation drug-eluting stents (DES), late stent failure remains a concern following stent placement. In-stent neoatherosclerosis has emerged as an important contributing factor to late vascular complications including very late stent thrombosis and late in-stent restenosis. Histologically, neoatherosclerosis is characterized by accumulation of lipid-laden foamy macrophages within the neointima with or without necrotic core formation and/or calcification. The development of neoatherosclerosis may occur in months to years following stent placement, whereas atherosclerosis in native coronary arteries develops over decades. Pathologic and clinical imaging studies have demonstrated that neoatherosclerosis occurs more frequently and ...

      Read Full Article
    1-24 of 36 1 2 »
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (36 articles) Michael Joner
    2. (20 articles) Technical University of Munich
    3. (14 articles) Robert A. Byrne
    4. (12 articles) Renu Virmani
    5. (9 articles) Cardiovascular Research Foundation
    6. (7 articles) Giulio Guagliumi
    7. (5 articles) Erasmus University
    8. (5 articles) Fernando Alfonso
    9. (5 articles) Francesco Prati
    10. (4 articles) K. U. Leuven
    11. (1 articles) Institute of Applied Physics
    12. (1 articles) Medical University of Vienna
    13. (1 articles) Kyungpook National University
    14. (1 articles) Singapore Eye Research Institute
    15. (1 articles) University of Western Australia
    16. (1 articles) Stefan G. Sacu
    17. (1 articles) Brendan F. Kennedy
    18. (1 articles) Yongyang Huang
    19. (1 articles) Jeehyun Kim
    20. (1 articles) Ursula Schmidt-Erfurth
  3. Popular Articles

  4. Picture Gallery

    3-Dimensional Optical Coherence Tomography Imaging in Early Coronary Stent Thrombosis Morphological assessment of renal arteries after radiofrequency catheter-based sympathetic denervation in a porcine model Early vascular healing with rapid breakdown biodegradable polymer sirolimus-eluting versus durable polymer everolimus-eluting stents assessed by optical coherence tomography Tissue Characterization After Drug-Eluting Stent Implantation Using Optical Coherence Tomography Feature Of The Week 4/14/2013: German Heart Center Researchers Describe Study Using OCT as a Tool for Characterization of Neointimal Tissue after Coronary Stent Implantation. Automatic characterization of neointimal tissue by intravascular optical coherence tomography Matching human pathology is essential for validating OCT imaging to detect high-risk plaques Multiple Simultaneous Plaque Erosion in 3 Coronary Arteries Neoatherosclerosis: overview of histopathologic findings and implications for intravascular imaging assessment 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 Full-range space-division multiplexing optical coherence tomography angiography Measuring 3D Optic Nerve Head Deformations using Digital Volume Correlation of in vivo Optical Coherence Tomography Data (Thesis)