1. 1-24 of 31 1 2 »
    1. Serial 3-Dimensional Optical Coherence Tomography Assessment of Jailed Side-Branch by Second-Generation Drug-Eluting Absorbable Metal Scaffold (From the BIOSOLVE-II Trial)

      Serial 3-Dimensional Optical Coherence Tomography Assessment of Jailed Side-Branch by Second-Generation Drug-Eluting Absorbable Metal Scaffold (From the BIOSOLVE-II Trial)

      Second-generation drug-eluting absorbable metal scaffold (DREAMS 2G) is used for treating coronary lesions. However, the natural history of the jailed side-branch (SB) after DREAMS 2G implantation remains to be elucidated. The aim of this study is to investigate the effect of scaffold struts on jailed SBs as assessed by 3-dimensional (3D) optical coherence tomography (OCT) after implantation of DREAMS 2G. We enrolled the patients who received a DREAMS 2G implantation and where OCT was performed at post-procedure and 12-month follow-up in the BIOSOLVE-II trial. The area of the ostium of jailed SBs and number of compartments divided by scaffold struts ...

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    2. Relation of Coronary Culprit Lesion Morphology Determined by Optical Coherence Tomography and Cardiac Outcomes to Serum Uric Acid Levels in Patients with Acute Coronary Syndrome

      Relation of Coronary Culprit Lesion Morphology Determined by Optical Coherence Tomography and Cardiac Outcomes to Serum Uric Acid Levels in Patients with Acute Coronary Syndrome

      The aims of the current study were to elucidate features of culprit lesion plaque morphology using optical coherence tomography (OCT) in relation to elevated serum uric acid (sUA) levels and to clarify the impact of sUA levels on adverse clinical outcomes in patients with acute coronary syndrome (ACS). Clinical data and outcomes were compared between ACS patients with sUA ≥6 mg/dL (high-sUA; n=506) and sUA <6.0 mg/dL (low-sUA; n=608). Angiography and OCT findings were analyzed in patients with pre-intervention OCT and compared between groups of high-sUA (n=206) and low-sUA (n=273). Patients with high-sUA ...

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    3. Recurrent Acute Decompensated Heart Failure Admissions for Patients with Reduced vs. Preserved Ejection Fraction (From the Atherosclerosis Risk in Communities Study)

      Recurrent Acute Decompensated Heart Failure Admissions for Patients with Reduced vs. Preserved Ejection Fraction (From the Atherosclerosis Risk in Communities Study)

      The aims of the current study were to elucidate features of culprit lesion plaque morphology using optical coherence tomography (OCT) in relation to elevated serum uric acid (sUA) levels and to clarify the impact of sUA levels on adverse clinical outcomes in patients with acute coronary syndrome (ACS). Clinical data and outcomes were compared between ACS patients with sUA ≥6 mg/dL (high-sUA; n=506) and sUA <6.0 mg/dL (low-sUA; n=608). Angiography and OCT findings were analyzed in patients with pre-intervention OCT and compared between groups of high-sUA (n=206) and low-sUA (n=273). Patients with high-sUA ...

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    4. Comparison of Accuracy of One Use Methods for Calculating Fractional Flow Reserve by Intravascular Optical Coherence Tomography to That Determined by the Pressure-Wire Method

      Comparison of Accuracy of One Use Methods for Calculating Fractional Flow Reserve by Intravascular Optical Coherence Tomography to That Determined by the Pressure-Wire Method

      While identification of hemodynamic significance of coronary lesions becomes important for revascularization strategy, the potential role of three-dimensional high-resolution intracoronary Optical coherence tomography (OCT) for predicting functional significance of coronary lesions remains unclear. We assessed the diagnostic performance of two computational approaches for deriving fractional flow reserve (FFR) from intravascular OCT images. We developed two methods to derive FFR from volumetric OCT images by applying analytical fluid dynamics (FFR-OCTAFD) and computational fluid dynamics (FFR-OCTCFD). Among 217 eligible patients between 2011 and 2014, total 104 patients were included for data analysis (9 for derivation, 95 for validation). Luminal geometries from three-dimensional ...

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    5. Intracoronary Optical Coherence Tomography-Derived Virtual Fractional Flow Reserve for the Assessment of Coronary Artery Disease

      Intracoronary Optical Coherence Tomography-Derived Virtual Fractional Flow Reserve for the Assessment of Coronary Artery Disease

      Fractional flow reserve (FFR) is widely used for the assessment of myocardial ischemia. Optical coherence tomography (OCT) provides accurate visualization of coronary artery morphology. The aim of this study was to investigate the relationship between FFR and OCT-derived FFR. We retrospectively analyzed 31 lesions (25 left anterior descending arteries, 2 left circumflex arteries, and 4 right coronary arteries) in 31 patients with moderate -severe coronary stenosis, who underwent OCT and FFR measurements simultaneously. OCT-derived FFR was calculated by the original algorithm, which was calculated using following equation based on fluid dynamics: ΔP = FV + SV 2 , where V is the flow ...

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    6. Impact of Cigarette Smoking and Smoking Cessation on Stent Changes as Determined by Optical Coherence Tomography after Sirolimus Stent Implantation

      Impact of Cigarette Smoking and Smoking Cessation on Stent Changes as Determined by Optical Coherence Tomography after Sirolimus Stent Implantation

      There is debate regarding whether smoking results in microstructural changes after stenting. The aim of this study was to evaluate the microstructural changes after stenting in patients with different smoking statuses. We retrospectively identified 220 sirolimus-eluting stents in 179 patients who underwent follow-up optical coherence tomography examination 12 months after sirolimus stenting. Subjects were classified as current smokers (CS, n=31), smoking cessation ≤1 year (SC1Y, n=36), smoking cessation >1 year (SC>1Y, n=27) and never smokers (NS, n=85). The neointimal hyperplasia (NIH) area was larger in CS than NS (1.04±0.72 mm 2 versus ...

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    7. SYNTAX Score and Pre- and Poststent Optical Coherence Tomography Findings in the Left Anterior Descending Coronary Artery in Patients With Stable Angina Pectoris

      SYNTAX Score and Pre- and Poststent Optical Coherence Tomography Findings in the Left Anterior Descending Coronary Artery in Patients With Stable Angina Pectoris

      SYNTAX score (SS) has been reported to be an independent predictor of future cardiac events including target lesion revascularization. The aim of this study was to assess the relation between SS and plaque characteristics and poststent vascular response using optical coherence tomography in coronary artery tree and left anterior descending artery (LAD) in patients with stable angina. A total of 179 lesions among 165 patients, including 100 lesions in LAD, were analyzed. Patients were stratified into tertiles. In pre–percutaneous coronary intervention analysis of whole coronary tree and LAD, lesions of the third tertile had the highest prevalence of lipid-rich ...

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    8. Serial Optical Coherence Tomography and Intravascular Ultrasound Analysis of Gender Difference in Changes of Plaque Phenotype in Response to Lipid-lowering Therapy

      Serial Optical Coherence Tomography and Intravascular Ultrasound Analysis of Gender Difference in Changes of Plaque Phenotype in Response to Lipid-lowering Therapy

      Although the clinical benefit of statins have been demonstrated in both genders, gender differences in the response to statin therapy on plaque morphological changes have not been reported. A total of 66 non-culprit plaques from 46 patients who had serial image acquisition at baseline, 6 months, and 12 months by both optical coherence tomography (OCT) and intravascular ultrasound (IVUS) were included. Patients were treated with atorvastatin 60mg (AT60) or 20mg (AT20). The baseline characteristics were similar between women (n=16) and men (n=30) except for age (59.3±6.8 vs. 52.5±10.6, years, P=0.027 ...

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    9. Comparison Between Cardiac Allograft Vasculopathy and Native Coronary Atherosclerosis by Optical Coherence Tomography

      Comparison Between Cardiac Allograft Vasculopathy and Native Coronary Atherosclerosis by Optical Coherence Tomography

      We sought to explore differences in distribution and morphology of coronary lesions comparing cardiac allograft vasculopathy (CAV) and native coronary atherosclerosis (NCA) using intravascular imaging with optical coherence tomography (OCT). At the time of routine surveillance angiography, 17 heart transplant (HT) recipients with a history of high-grade cellular rejection (HGR) and 43 HT recipients with none/mild (low)-grade rejection (LGR) underwent OCT imaging of the left anterior descending (LAD) and were compared to 60 non-HT patients with NCA. Compared with NCA patients, HGR patients had similar intima areas, but smaller external elastic lamina (EEL) areas [7.9 mm 2 ...

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      Mentions: Gary S. Mintz
    10. Comparison of Intensive versus Moderate Lipid-lowering Therapy on Fibrous Cap and Atheroma Volume of Coronary Lipid-rich Plaque Using Serial Optical Coherence Tomography and Intravascular Ultrasound Imaging

      Comparison of Intensive versus Moderate Lipid-lowering Therapy on Fibrous Cap and Atheroma Volume of Coronary Lipid-rich Plaque Using Serial Optical Coherence Tomography and Intravascular Ultrasound Imaging

      Despite marked clinical benefit, reduction in atheroma volume with statin therapy is minimal. Changes in plaque composition may explain this discrepancy. We aimed in the present study to assess the effect of statin therapy on coronary plaque composition as well as plaque volume using serial multimodality imaging. From an open-label, single-blinded study, patients with angiographically mild to moderate lesion were randomized to receive atorvastatin 60 (AT 60) mg or atorvastatin 20 (AT 20) mg for 12 months. Optical coherence tomography (OCT) was used to assess fibrous cap thickness (FCT) and intravascular ultrasound (IVUS) to assess atheroma burden at three time ...

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    11. Comparison of Strut Coverage at Six Months by Optical Coherence Tomography with Everolimus Eluting Stent or Bare-Metal Stent Restenosis –vs- Stenosis of Non-Stented Atherosclerotic Narrowing (from the DESERT Study)

      Comparison of Strut Coverage at Six Months by Optical Coherence Tomography with Everolimus Eluting Stent or Bare-Metal Stent Restenosis –vs- Stenosis of Non-Stented Atherosclerotic Narrowing (from the DESERT Study)

      Incomplete struts coverage is a predictor of late stent thrombosis after drug eluting stent (DES) implantation in atherosclerotic lesions. The process of struts coverage in DES implanted for bare-metal stent (BMS) restenosis has never been described. Thirty-two patients with stable coronary artery disease were consecutively selected, 11 with BMS restenosis (group A) and 21 with de-novo atherosclerotic lesions (group B). All patients underwent everolimus eluting stent implantation; coronary angiography and optical coherence tomography (OCT) were performed at 6-month follow-up. Percentage difference in struts coverage between the two groups was the primary end-point. A total of 85773 struts (17891 in group ...

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    12. Optical Coherence Tomographic Evaluation of the Effect of Cigarette Smoking on Vascular Healing after Sirolimus-Eluting Stent Implantation

      Optical Coherence Tomographic Evaluation of the Effect of Cigarette Smoking on Vascular Healing after Sirolimus-Eluting Stent Implantation

      Cigarette smoking is known to be deleterious to patients with coronary artery disease, however the effect of smoking on vascular responses after coronary drug-eluting stent implantation is unknown. We sought to examine vascular response after sirolimus-eluting stent (SES) implantation in patients with ongoing smoking using optical coherence tomography (OCT), compared with former smokers and nonsmokers. We identified 181 SESs in 140 subjects who underwent follow-up OCT imaging. Subjects were divided into 3 groups: current smokers (n = 28), former smokers (n = 35), and nonsmokers (n = 77). Stent strut coverage, neointimal characteristics, and strut malapposition were evaluated. The incidence of uncovered stent ...

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    13. Mechanisms of Postintervention and Nine-Month Luminal Enlargement After Treatment of Drug-Eluting In-Stent Restenosis With a Drug-Eluting Balloon

      Mechanisms of Postintervention and Nine-Month Luminal Enlargement After Treatment of Drug-Eluting In-Stent Restenosis With a Drug-Eluting Balloon

      Using optical coherence tomography (OCT), the mechanisms of postintervention and 9-month luminal enlargement in drug-eluting stent in-stent restenosis (ISR) lesions treated with a drug-eluting balloon (DEB) were evaluated. A total of 42 patients with DEB-treated drug-eluting stent ISR lesions underwent serial OCT examination before intervention, after intervention, and at 9-month follow-up. Preintervention OCT-derived neointima was classified as either a homogeneous or nonhomogeneous pattern. Ten ISR lesions with homogeneous neointima were identified and compared with 32 ISR lesions with nonhomogeneous neointima. When comparing pre- and postintervention evaluations, changes in luminal cross-sectional area (CSA) were 3.4 mm 2 in ISR lesions ...

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    14. Serial Assessment by Optical Coherence Tomography of Early and Late Vascular Responses After Implantation of an Absorbable-Coating Sirolimus-Eluting Stent (from the First-in-Human DESSOLVE I Trial)

      Serial Assessment by Optical Coherence Tomography of Early and Late Vascular Responses After Implantation of an Absorbable-Coating Sirolimus-Eluting Stent (from the First-in-Human DESSOLVE I Trial)

      The initial enthusiasm caused by the potent antirestenotic effect of early generation drug-eluting stents was recently plagued by concerns regarding their safety profile. Investigators worldwide were stimulated, therefore, to seek for improvement in drug-eluting stent technology, such as eliminating their permanent polymer blamed for vascular inflammation and delayed healing. Optical coherence tomography (OCT) assessments of stent-vessel interactions are used as a surrogate for vessel healing after DES implantation. Herewith, we report serial OCT assessments of vascular reactions to the implantation of a novel absorbable polymer sirolimus-eluting stent (MiStent). In total, 30 patients were included. At 4-, 6-, and 8-month follow-up ...

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    15. Correlation Between Degree of Neointimal Hyperplasia and Incidence and Characteristics of Neoatherosclerosis as Assessed by Optical Coherence Tomography

      Correlation Between Degree of Neointimal Hyperplasia and Incidence and Characteristics of Neoatherosclerosis as Assessed by Optical Coherence Tomography

      Emerging evidence suggests that neointimal degenerative changes with development of neoatherosclerosis (NA) may represent an important mechanism for late stent failure. The aim of the present study was to investigate the relation between degree of neointimal hyperplasia and incidence and characteristics of NA using optical coherence tomography. We identified a total of 252 stents with mean neointimal thickness (NIT) >100 μm in 212 patients: 100 bare metal stents (BMSs) and 152 drug-eluting stents (DESs). Based on the values of mean NIT, we divided stents into tertiles and compared neointimal characteristics among the 3 groups. NA was defined as the presence ...

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    16. Coronary Superficial and Spotty Calcium Deposits in Culprit Coronary Lesions of Acute Coronary Syndrome as Determined by Optical Coherence Tomography

      Coronary Superficial and Spotty Calcium Deposits in Culprit Coronary Lesions of Acute Coronary Syndrome as Determined by Optical Coherence Tomography

      The characteristics of coronary artery calcium responsible for vulnerable plaque remain incompletely elucidated. We used optical coherence tomography to investigate the characteristics of coronary calcium in acute myocardial infarction (AMI), unstable angina pectoris (UAP), and stable angina pectoris (SAP). We evaluated calcium deposits in the culprit lesions (30-mm segment) using optical coherence tomography in 187 patients with AMI (n = 44), UAP (n = 73), or SAP (n = 70). The arc, area, and length of calcium were significantly smaller in those with AMI and UAP than in those with SAP (p <0.001). The number of spotty calcium deposits (with an arc ...

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    17. Association Between Proximal Stent Edge Positioning on Atherosclerotic Plaques Containing Lipid Pools and Postprocedural Myocardial Infarction (from the CLI-POOL Study)

      Association Between Proximal Stent Edge Positioning on Atherosclerotic Plaques Containing Lipid Pools and Postprocedural Myocardial Infarction (from the CLI-POOL Study)

      Postprocedural myocardial infarction is an ominous complication of percutaneous coronary intervention (PCI). Despite several patient, lesion, and procedural factors that may affect its occurrence and severity, it is unclear if implanting a stent edge on a coronary lipid pool, as appraised by optical coherence tomography (OCT), adversely affects outcomes. The aim of this study was to assess the association between postprocedural myocardial infarction and the implantation of a stent edge on a lipid pool, as assessed by OCT. A database was screened for patients without ongoing myocardial infarctions; who underwent PCI with stenting for single, native, de novo lesions; without ...

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    18. Comparison of Early Strut Coverage Between Zotarolimus- and Everolimus-Eluting Stents Using Optical Coherence Tomography

      Comparison of Early Strut Coverage Between Zotarolimus- and Everolimus-Eluting Stents Using Optical Coherence Tomography
      There have been no optical coherence tomographic (OCT) data directly comparing the pattern of strut coverage between the 2 second-generation drug-eluting stents in the early period. The aim of this prospective study was to evaluate early strut coverage using optical coherence tomography 3 months after Resolute zotarolimus-eluting stent (ZES-R) or everolimus-eluting stent (EES) implantation in de novo coronary artery lesions. A total of 40 patients who were suitable for the OCT procedure and consented to the study protocol were randomized 1:1 to receive either ZES-R or EES. Among these patients, 35 stented lesions (18 ZES-R, 17 EES) in 34 ...
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    19. Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Reproducibility of Coronary Optical Coherence Tomography for Lumen and Length Measurements in Humans (The CLI-VAR [Centro per la Lotta contro l'Infarto-VARiability] Study)

      Frequency-domain optical coherence tomography (FD-OCT) is becoming a useful diagnostic tool for coronary imaging for quantitative coronary analysis. Second-generation FD-OCT produces detailed coronary lumen images. However, the reproducibility of coronary measurements using FD-OCT in humans has not been thoroughly explored. Our goal was to determine the intraobserver, interobserver, and interpullback reproducibility of the in vivo FD-OCT measurements of the lumen area and/or lesion length. Twenty-five patients undergoing coronary angioplasty were included. In all subjects, FD-OCT pullbacks (20 mm/s) were acquired twice from the same coronary segment different from the target lesion, at an interval of 5 minutes, with ...

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    20. Comparison of Incidence and Time Course of Neoatherosclerosis Between Bare Metal Stents and Drug-Eluting Stents Using Optical Coherence Tomography

      Comparison of Incidence and Time Course of Neoatherosclerosis Between Bare Metal Stents and Drug-Eluting Stents Using Optical Coherence Tomography

      Recent studies have reported the development of neoatherosclerosis inside stents and subsequent acute coronary syndrome secondary to disruption of neointimal hyperplasia. The aim of the study was to compare the characteristics of neointimal hyperplasia and its time course between bare metal stents (BMSs) and drug-eluting stents (DESs) using optical coherence tomography. A total of 138 stents were divided into 3 groups according to the follow-up period: early phase, <9 months (25 BMSs and 27 DESs); intermediate phase, ≥9 and <48 months (18 BMSs and 43 DESs); and delayed phase, ≥48 months (13 BMSs and 12 DESs). Optical coherence tomographic analysis ...

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    21. Optical Coherence Tomography and Highly Sensitivity Troponin T for Evaluating Cardiac Allograft Vasculopathy

      Optical Coherence Tomography and Highly Sensitivity Troponin T for Evaluating Cardiac Allograft Vasculopathy

      rdiac allograft vasculopathy (CAV) is a major impediment to long-term graft survival after heart transplantation. Intravascular ultrasound (IVUS) is more sensitive than coronary angiography for diagnosis, but the identification of specific plaque components or plaque composition is limited. In addition, there is an evident need for other noninvasive tools for diagnosing CAV. The aim of this study was to assess the utility of 2 new techniques for evaluating CAV: optical coherence tomography (OCT), and new high-sensitivity troponin T (hsTnT) assays. In 21 heart transplantation patients, coronary arteriography with IVUS and OCT were performed. Maximal intimal thickness (MIT) and luminal area ...

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    22. Comparison of In Vivo Assessment of Vulnerable Plaque by 64-Slice Multislice Computed Tomography Versus Optical Coherence Tomography

      Comparison of In Vivo Assessment of Vulnerable Plaque by 64-Slice Multislice Computed Tomography Versus Optical Coherence Tomography
      The aim of this study was to investigate the possibility of 64-slice multislice computed tomography (MSCT) to detect vulnerable plaque derived by optical coherence tomography. From September 2007 through December 2009, 122 lesions in 81 patients were evaluated by 64-slice MSCT and optical coherence tomography. Based on optical coherence tomographic findings, lesions were classified as thin-capped fibroatheroma (TCFA; n = 37) and non-TCFA (n = 85). Mean computed tomographic density value of the lesion was lower and remodeling index was larger in the TCFA group (44.9 ± 19.2 vs 78.7 ± 25.0 HU, p
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    23. Clinical Classification and Plaque Morphology Determined by Optical Coherence Tomography in Unstable Angina Pectoris

      Clinical Classification and Plaque Morphology Determined by Optical Coherence Tomography in Unstable Angina Pectoris
      Unstable angina pectoris (UAP) is categorized with the Braunwald classification. However, the association of clinical presentation and plaque structure/function has not yet been elucidated in relation to cause. We used optical coherence tomography to investigate this relation. One hundred fifteen patients with primary UAP were categorized according to the Braunwald classification. Patients with class I UAP had the highest frequency of ulcers without fibrous cap disruption (p = 0.003) and the smallest minimum lumen area (class I, median 0.70 mm2, quartiles 1 to 3 0.42 to 1.00; class II, 1.80 mm2, 1.50 to 2 ...
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    24. Relation of Microchannel Structure Identified by Optical Coherence Tomography to Plaque Vulnerability in Patients With Coronary Artery Disease

      Relation of Microchannel Structure Identified by Optical Coherence Tomography to Plaque Vulnerability in Patients With Coronary Artery Disease
      Increased neovascularization in atherosclerotic plaques is associated with plaque vulnerability. The high resolution of optical coherence tomography (OCT) might provide a chance to directly visualize plaque neovascularization in vivo. The aim of the present study was to investigate the relation between microchannels in culprit plaques identified by OCT and plaque vulnerability in patients with coronary artery disease. A total of 63 consecutive patients with coronary artery disease who had undergone both OCT and intravascular ultrasound before any interventions to examine culprit lesion morphologies were enrolled. Microchannel was defined as a no-signal tubuloluminal structure on the cross-sectional optical coherence tomographic image ...
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    1-24 of 31 1 2 »
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