1. Hiroyuki Kawata

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    1. Mentioned In 10 Articles

    2. Thin-cap fibroatheroma and large calcification at the proximal stent edge correlate with a high proportion of uncovered stent struts in the chronic phase

      Thin-cap fibroatheroma and large calcification at the proximal stent edge correlate with a high proportion of uncovered stent struts in the chronic phase
      Objective: A high proportion of uncovered stent struts is associated with late stent thrombosis after drug-eluting stent (DES) implantation, which frequently results in myocardial infarction or death. However, the predictors of uncovered stent struts remain unknown. Here, using optical coherence tomography (OCT), we studied the baseline tissue characteristics of the target coronary segment and evaluated their influence on the neointimal coverage of the strut in the chronic phase. Methods: We ...
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    3. Colocalization of thin-cap fibroatheroma and spotty calcification is a powerful predictor of procedure-related myocardial injury after elective coronary stent implantation

      Colocalization of thin-cap fibroatheroma and spotty calcification is a powerful predictor of procedure-related myocardial injury after elective coronary stent implantation
      Objectives Percutaneous coronary intervention (PCI)-related cardiac enzyme elevation is an independent risk factor for adverse clinical outcomes, but preprocedural predictors of this complication have not been established. This study evaluated the morphological characteristics of culprit lesions by frequency-domain optical coherence tomography (FD-OCT), and examined their predictive value for procedure-related myocardial injury in patients undergoing elective PCI. Methods Sixty-eight patients treated by FD-OCT-guided elective PCI were studied. On the basis ...
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    4. Side branch complication after a single-stent crossover technique: prediction with frequency domain optical coherence tomography

      Side branch complication after a single-stent crossover technique: prediction with frequency domain optical coherence tomography
      Objectives: To identify preprocedural predictors of side branch (SB) complications after coronary bifurcation stent implantation using frequency domain optical coherence tomography (FD-OCT). Background: Coronary bifurcation lesions are common but difficult to treat. Longitudinal reconstruction images of FD-OCT have high image quality and less motion artifacts. Methods: Among 49 patients (age: 69.9 years) who underwent elective coronary stenting, 52 bifurcation lesions without baseline SB stenosis were studied. SB complication was ...
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    5. Thin-cap fibroatheroma and microchannel findings in optical coherence tomography correlate with subsequent progression of coronary atheromatous plaques

      Thin-cap fibroatheroma and microchannel findings in optical coherence tomography correlate with subsequent progression of coronary atheromatous plaques
      ...ari Soeda, 4. Satoshi Okayama, 5. Ji Hee Sung, 6. Hitoshi Nakagawa, 7. Satoshi Somekawa, 8. Yukiji Takeda, 9. Hiroyuki Kawata, 10. Manabu Horii and 11. Yoshihiko Saito 1. First Department of Medicine, Nara Medical Univer...
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    6. Diagnostic accuracy of dual-source computed tomography in the characterization of coronary atherosclerotic plaques: Comparison with intravascular optical coherence tomography

      Abstract: Background: Dual-source computed tomography (DSCT) has enabled us to non-invasively visualize coronary artery stenosis, but its ability to characterize coronary atherosclerotic plaques (ASPs) has not been evaluated. Intravascular optical coherence tomography (OCT) provides tissue images of coronary artery wall that are validated by pathohistological studies. We studied the diagnostic accuracy of DSCT in the characterization of coronary ASPs, especially lipid-rich ASP with thin fibrous cap (TCFA), in comparison with ...
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    7. Long-Term Follow-up of Neointimal Coverage of Sirolimus-Eluting Stents: Evaluation With Optical Coherence Tomography

      Long-Term Follow-up of Neointimal Coverage of Sirolimus-Eluting Stents: Evaluation With Optical Coherence Tomography
      Late stent thrombosis related to delayed neointimal growth is a major concern after drug-eluting stent (DES) implantation. The time course of neointimal growth and risk factors of uncovered stent struts after sirolimus-eluting stent (SES) was studied using optical coherence tomography (OCT). Methods and Results: The 60 patients were enrolled and classified into G1 (follow-up period 25 months, n=15). The time elapsed since SES implantation was associated with a significant ...
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    8. Morphological features of coronary arteries in patients with coronary spastic angina: Assessment with intracoronary optical coherence tomography

      Background Coronary spasm (CS) plays an important role in the pathogenesis of many types of ischemic heart disease, but morphological appearance of non-stenotic coronary segments with CS is not fully understood. We evaluate the morphological characteristics of coronary arteries in patients with coronary spastic angina (CSA) using intravascular optical coherence tomography (OCT). Methods We evaluated 37 patients with resting chest pain whose coronary angiograms did not reveal significant stenosis. These ...
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    9. Coronary Spasm Occurs in Coronary Artery with Diffuse Intima Thickeing without Lipd and/or Calcification:Evaluation with Intravascular Optical Coherence Tomography

      ...Soeda^; Satoshi Okayama^; Yasuhiro Takemoto^; Kenji Onoue^; Satoshi Somekawa^; Taku Nishida^; Yukiji Takeda^; Hiroyuki Kawata^; Manabu Horii^; Tamio Nakajima^; Yoshihiko Saito^ Nara Med Univ, Nara, Japan Coronary spasm (...
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  2. About Hiroyuki Kawata

    Hiroyuki Kawata is an Assistant Professor with the First Department of Internal Medicine at Nara Medical University.