1. Articles from Masahiro Yamada

    1-6 of 6
    1. Incidence and clinical impact of thrombus after stent implantation in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study

      Incidence and clinical impact of thrombus after stent implantation in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study

      Background: We previously reported that ST-segment elevation myocardial infarction (STEMI) patients with large residual thrombus burden after thrombectomy before stent implantation had more severe microvascular dysfunction, and greater myocardial damage compared with those with small residual thrombus. However, clinical significance of residual thrombus after stent implantation in STEMI patients is unclear. Aims: This study aimed to evaluate the incidence of thrombus by optical coherence tomography (OCT) after stent implantation, and to investigate its clinical impact in STEMI patients. Methods and Results: A total of 180 STEMI patients within 12 hours after onset of symptoms were studied. Patients were divided into ...

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    2. Prasugrel versus clopidogrel for residual thrombus burden in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study

      Prasugrel versus clopidogrel for residual thrombus burden in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study

      Background Prasugrel was shown to inhibit platelet activity more rapidly and consistently than clopidogrel . We compared the effects of prasugrel and clopidogrel on residual thrombus burden assessed by optical coherence tomography after stent implantation in patients with ST-segment elevation myocardial infarction (STEMI). Patients and methods A total of 76 patients with STEMI undergoing percutaneous coronary intervention (PCI) within 12 h after the onset were retrospectively enrolled. Of them, 34 patients were treated with prasugrel (loading dose, 20 mg) and the remaining 42 with clopidogrel (loading dose, 300 mg). Stent volume and in-stent thrombus volume were assessed by post-PCI optical coherence ...

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    3. Does Residual Thrombus After Aspiration Thrombectomy Affect the Outcome of Primary PCI in Patients With ST-Segment Elevation Myocardial Infarction? An Optical Coherence Tomography Study

      Does Residual Thrombus After Aspiration Thrombectomy Affect the Outcome of Primary PCI in Patients With ST-Segment Elevation Myocardial Infarction? An Optical Coherence Tomography Study

      Objectives The aim of this study was to evaluate if residual thrombus burden after aspiration thrombectomy affects the outcomes of primary percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction (STEMI). Background Recent studies failed to show clinical benefit of aspiration thrombectomy in STEMI patients. This might be due to insufficient removal of thrombus at the culprit lesion. Methods A total of 109 STEMI patients who underwent aspiration thrombectomy followed by stenting within 24 h from symptom onset were included. Optical coherence tomography was performed after thrombectomy to measure residual thrombus burden. Patients were divided into tertiles based on ...

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    4. Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study

      Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study

      Background— Previous studies reported that reduced TIMI (Thrombolysis in Myocardial Infarction) flow grade before procedure was associated with worse clinical outcomes in patients with ST-segment–elevation myocardial infarction undergoing primary percutaneous coronary intervention. The aim of this study was to identify specific morphological characteristics of the culprit plaque associated with poor TIMI flow grade at baseline in patients with ST-segment–elevation myocardial infarction using both optical coherence tomography and intravascular ultrasound. Methods and Results— A total of 111 ST-segment–elevation myocardial infarction patients who underwent percutaneous coronary intervention within 24 hours of symptom onset were included. Both optical coherence tomography ...

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    5. Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study

      Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study

      Background— Previous studies reported that reduced TIMI (Thrombolysis in Myocardial Infarction) flow grade before procedure was associated with worse clinical outcomes in patients with ST-segment–elevation myocardial infarction undergoing primary percutaneous coronary intervention. The aim of this study was to identify specific morphological characteristics of the culprit plaque associated with poor TIMI flow grade at baseline in patients with ST-segment–elevation myocardial infarction using both optical coherence tomography and intravascular ultrasound. Methods and Results— A total of 111 ST-segment–elevation myocardial infarction patients who underwent percutaneous coronary intervention within 24 hours of symptom onset were included. Both optical coherence tomography ...

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    6. A Combined Optical Coherence Tomography and Intravascular Ultrasound Study on Plaque Rupture, Plaque Erosion, and Calcified Nodule in Patients With ST-Segment Elevation Myocardial Infarction : Incidence, Morphologic Characteristics, and Outcomes After Per

      A Combined Optical Coherence Tomography and Intravascular Ultrasound Study on Plaque Rupture, Plaque Erosion, and Calcified Nodule in Patients With ST-Segment Elevation Myocardial Infarction : Incidence, Morphologic Characteristics, and Outcomes After Per

      Objectives This study sought to evaluate the incidence of plaque rupture (PR), plaque erosion (PE), and calcified nodule (CN) using optical coherence tomography (OCT) in patients with ST-segment elevation myocardial infarction (STEMI); to compare detailed morphologic plaque characteristics of PR, PE, and CN with optical coherence tomography and intravascular ultrasound; and to compare the post-procedure outcomes among PR, PE, and CN. Background The incidence and detailed morphologic characteristics of PR, PE, and CN in STEMI patients and their outcome after percutaneous coronary intervention (PCI) are unknown. Methods A total of 112 STEMI patients who underwent PCI within 12 h from ...

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    1-6 of 6
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    A Combined Optical Coherence Tomography and Intravascular Ultrasound Study on Plaque Rupture, Plaque Erosion, and Calcified Nodule in Patients With ST-Segment Elevation Myocardial Infarction : Incidence, Morphologic Characteristics, and Outcomes After Per Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study Coronary Plaque Characteristics Associated With Reduced TIMI (Thrombolysis in Myocardial Infarction) Flow Grade in Patients With ST-Segment–Elevation Myocardial Infarction A Combined Optical Coherence Tomography and Intravascular Ultrasound Study Does Residual Thrombus After Aspiration Thrombectomy Affect the Outcome of Primary PCI in Patients With ST-Segment Elevation Myocardial Infarction? An Optical Coherence Tomography Study Prasugrel versus clopidogrel for residual thrombus burden in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study Incidence and clinical impact of thrombus after stent implantation in patients with ST-segment elevation myocardial infarction: an optical coherence tomography study 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) Optical coherence tomography for characterization of nanocomposite materials (Thesis) In Vivo Corneal Microstructural Changes in Herpetic Stromal Keratitis: A Spectral-Domain Optical Coherence Tomography Analysis Non-invasive optical screening of Streptococcus Pneumonia based inflammatory changes of the tympanic membrane and mastoid mucosa in guinea pig otitis media using optical coherence tomography Visual function tests including the role of optical coherence tomography in neurofibromatosis