1. Tetsumin Lee

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    1. Mentioned In 31 Articles

    2. Left coronary artery calcification patterns after coronary bypass graft surgery: An in‐vivo optical coherence tomography study

      Left coronary artery calcification patterns after coronary bypass graft surgery: An in‐vivo optical coherence tomography study
      Objectives We sought to evaluate the severity and patterns of calcifications in the left main coronary artery (LMCA) and proximal segments of left anterior descending coronary artery (LAD) and left circumflex artery (LCX) using optical coherence tomography (OCT) in patients with and without prior coronary artery bypass grafting (CABG). Background CABG may accelerate upstream calcium development. Methods OCT images ( n = 76) of the LMCA bifurcation from either the LAD or ...
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    3. Prognostic impact of healed coronary plaque in non-culprit lesions assessed by optical coherence tomography

      Prognostic impact of healed coronary plaque in non-culprit lesions assessed by optical coherence tomography
      Background and Aims We sought to investigate the characteristics and prognostic impact of healed plaque (HP) detected by optical coherence tomography (OCT) in non-culprit segments in treated vessels. Methods OCT analysis included HP having a different optical intensity with clear demarcation from underlying plaque, thin-cap fibroatheroma (TCFA), and minimal lumen area. Non-culprit lesion (NCL) was defined as a plaque with 90 arc of disease (0.5mm intimal thickness), length 2 ...
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    4. Plaque morphology assessed by optical coherence tomography in the culprit lesions of the first episode of acute myocardial infarction in patients with low low-density lipoprotein cholesterol level

      Plaque morphology assessed by optical coherence tomography in the culprit lesions of the first episode of acute myocardial infarction in patients with low low-density lipoprotein cholesterol level
      Background There remains a residual risk for acute myocardial infarction (AMI) even with low low-density lipoprotein cholesterol (LDL-C) levels. This study aimed to characterize the culprit lesion morphology of AMI by optical coherence tomography (OCT) in patients with low LDL-C. Methods Four-hundred and nine culprit lesions of 409 patients with their first presentation of AMI imaged by OCT were investigated. OCT analysis included the presence of plaque rupture and thin-capped ...
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    5. Optical coherence tomography‐defined plaque vulnerability in relation to functional stenosis severity stratified by fractional flow reserve and quantitative flow ratio

      Optical coherence tomography‐defined plaque vulnerability in relation to functional stenosis severity stratified by fractional flow reserve and quantitative flow ratio
      Objectives We sought to investigate that the quantitative flow ratio (QFR) might be associated with optical coherence tomography (OCT)‐defined plaque vulnerability. Background Both functional stenosis severity and plaque instability are related to adverse clinical outcomes in patients with coronary artery disease. Recent studies have shown an association between physiological stenosis severity and the presence of thin‐cap fibroatheroma (TCFA). Measurement of QFR is a novel method for rapid computational ...
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    6. Ventricular Fibrillation During Optical Coherence Tomography/Optical Frequency Domain Imaging ― A Large Single-Center Experience ―

      Ventricular Fibrillation During Optical Coherence Tomography/Optical Frequency Domain Imaging ― A Large Single-Center Experience ―
      Abstract Background: The risks of ventricular fibrillation (Vfib) associated with frequency-domain optical coherence tomography (OCT)/optical frequency domain imaging (OFDI) remain undetermined. Methods and Results: We retrospectively studied the occurrence of Vfib during OCT/OFDI for unselected indications. The frequency of Vfib and patient and procedural characteristics were investigated. A total of 4,467 OCT/OFDI pullback examinations were performed in 1,754 patients (median of 2.0 [2.03 ...
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    7. The relation between optical coherence tomography-detected layered pattern and acute side branch occlusion after provisional stenting of coronary bifurcation lesions

      The relation between optical coherence tomography-detected layered pattern and acute side branch occlusion after provisional stenting of coronary bifurcation lesions
      Background/Purpose. Layered pattern (presumed to be healed plaque after a thrombotic event) can be observed by optical coherence tomography (OCT). We sought to assess the ability of OCT-detected plaque composition to predict acute side branch (SB) occlusion after provisional bifurcation stenting. Methods This is a retrospective observational study using pre-intervention OCT in the main vessel to predict Thrombolysis in Myocardial Infarction (TIMI) flow grade 1 in a SB (diameter ...
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    8. Optical Coherence Tomography–Defined Plaque Vulnerability in Relation to Functional Stenosis Severity and Microvascular Dysfunction

      Optical Coherence Tomography–Defined Plaque Vulnerability in Relation to Functional Stenosis Severity and Microvascular Dysfunction
      Objectives This study sought to investigate the relationship of unstable plaque features with physiological lesion severity and microvascular dysfunction . Background The functional severity of epicardial lesions and microvascular dysfunction are both related to adverse clinical outcomes. Methods We investigated 382 de novo intermediate and severe coronary lesions in 340 patients who underwent optical coherence tomography , fractional flow reserve (FFR), and index of microcirculatory resistance (IMR) examinations. Lesions were divided into ...
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    9. A prospective, single‐center, randomized study to assess whether automated coregistration of optical coherence tomography with angiography can reduce geographic miss

      A prospective, single‐center, randomized study to assess whether automated coregistration of optical coherence tomography with angiography can reduce geographic miss
      Objective We sought to evaluate whether automated coregistration of optical coherence tomography (OCT) with angiography reduces geographic miss (GM) during coronary stenting. Background Previous intravascular ultrasound or OCT studies have showed that residual disease at the stent edge or stent edge dissection was associated with stent thrombosis or edge restenosis. This has been termed GM. Methods Two hundred de novo coronary lesions were randomized in a 1:1 ratio to ...
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    10. The Effectiveness of Excimer Laser Angioplasty to Treat Coronary In-Stent Restenosis With Peri-stent Calcium as Assessed by Optical Coherence Tomography

      The Effectiveness of Excimer Laser Angioplasty to Treat Coronary In-Stent Restenosis With Peri-stent Calcium as Assessed by Optical Coherence Tomography
      Aims: We evaluated the effectiveness of excimer laser coronary angioplasty (ELCA) to treat in-stent restenosis (ISR) due to peri-stent calcium-related stent under-expansion as assessed by optical coherence tomography (OCT). Methods and results: We studied 81 patients (81 lesions with ISR, stent under-expansion, and peri-stent calcium 90) who underwent OCT imaging both pre- and post-percutaneous coronary intervention and compared lesions treated with ELCA (n=23) vs without ELCA (n=58). ELCA ...
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    11. Multimodality coronary imaging to predict periprocedural myocardial necrosis after an elective percutaneous coronary intervention

      Multimodality coronary imaging to predict periprocedural myocardial necrosis after an elective percutaneous coronary intervention
      Background Although multiple imaging modalities have been tested to predict periprocedural myocardial necrosis (PMN), the superior predictive efficacy of these imaging findings has not been established fully. We sought to evaluate which findings of the coronary imaging tools would best provide predictive efficacy of PMN among optical coherence tomography (OCT), intravascular ultrasound (IVUS), and coronary computed tomography (CCT) angiography. Patients and methods A total of 130 patients with stable angina ...
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    12. Relationship between optical coherence tomography-derived morphological criteria and functional relevance as determined by fractional flow reserve

      Relationship between optical coherence tomography-derived morphological criteria and functional relevance as determined by fractional flow reserve
      Background Although several previous studies have indicated that optical coherence tomography (OCT)-derived minimal lumen area (MLA) correlates with fractional flow reserve (FFR) severity, other morphologic criteria for functionally significant coronary stenosis assessed by FFR have not been fully elucidated. This study aimed to identify OCT-based morphological predictors of physiologically significant ischemia assessed by FFR in angiographically intermediate coronary lesions. Methods We investigated 194 de novo intermediate coronary lesions in ...
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    13. In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography

      In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography
      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- ...
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  2. About Tetsumin Lee

    Tetsumin Lee is at Tsuchiura Kyodo General Hospital in Japan.