1. Junya Ako

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    1. Mentioned In 13 Articles

    2. Lipoprotein (a) level is associated with plaque vulnerability in patients with coronary artery disease: An optical coherence tomography study

      Lipoprotein (a) level is associated with plaque vulnerability in patients with coronary artery disease: An optical coherence tomography study
      Background High lipoprotein (a) [Lp(a)] levels are an independent factor for worse prognosis in patients with coronary artery disease (CAD). However, the association between serum Lp(a) level and coronary plaque vulnerability remains to be determined. Methods A total of 255 consecutive patients with CAD who underwent optical coherence tomography imaging of culprit lesions were included. Patients were divided into 2 groups according to their Lp(a) levels (the ...
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    3. Zero-Contrast Optical Coherence Tomography- and Physiology-Guided Percutaneous Coronary Intervention for Severely Calcified Lesion

      Zero-Contrast Optical Coherence Tomography- and Physiology-Guided Percutaneous Coronary Intervention for Severely Calcified Lesion
      An 80-year-old man with severe kidney dysfunction (estimated glomerular filtration rate, 26 mL/min/1.73 m 2 ) not requiring hemodialysis presented with effort angina. Diagnostic angiography with minimum contrast showed a diffuse lesion in the proximal right coronary artery (RCA; Figure A ). On a later day, optical coherence tomography (OCT)-guided percutaneous coronary intervention (PCI) with dextran injection was performed. Because multiple cracks were seen in the severely calcified ...
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    4. Incidence, factors, and clinical significance of cholesterol crystals in coronary plaque: An optical coherence tomography study

      Incidence, factors, and clinical significance of cholesterol crystals in coronary plaque: An optical coherence tomography study
      Background and aims Intraplaque cholesterol crystal (CC) is recognized as a component of vulnerable plaques. However, the clinical characteristics of patients with CC and the impact of CC on clinical events remain unknown. Methods A total of 340 consecutive patients who underwent optical coherence tomography (OCT) imaging of culprit lesions were included in the study. CC was defined as a thin linear structure with high reflectivity and low signal attenuation ...
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    5. Achilles tendon thickening is associated with disease severity and plaque vulnerability in patients with coronary artery disease

      Achilles tendon thickening is associated with disease severity and plaque vulnerability in patients with coronary artery disease
      Background Tendon xanthomas are accumulations of collagen and macrophages which contain cholesterol esters and a marker of high risk for coronary artery disease (CAD). Objective To clarify whether the presence of Achilles tendon thickening (ATT) was associated with disease severity and plaque vulnerability in patients with CAD. Methods A total of 241 consecutive patients who underwent percutaneous coronary intervention and ATT assessment were analyzed. ATT was defined as Achilles tendon ...
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    6. Impact of underlying plaque type on strut coverage in the early phase after drug-eluting stent implantation

      Impact of underlying plaque type on strut coverage in the early phase after drug-eluting stent implantation
      Background The aim of this study was to investigate whether the underlying plaque type affects the neointimal coverage after drug-eluting stent implantation. Methods A total of 1793 struts in 22 zotarolimus-eluting stents were assessed using optical coherence tomography imaging within 3 months of implantation. Neointimal coverage was evaluated within 5mm from each stent edge on cross-sectional optical coherence tomography images at every 1-mm interval. The percentage of struts covered by ...
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    7. Early Phase Arterial Reaction Following Drug-Eluting and Bare-Metal Stent Implantation in Patients With ST-Segment Elevation Myocardial Infarction Optical Coherence Tomography Assessment at 2 Weeks

      Early Phase Arterial Reaction Following Drug-Eluting and Bare-Metal Stent Implantation in Patients With ST-Segment Elevation Myocardial Infarction Optical Coherence Tomography Assessment at 2 Weeks
      The early phase arterial reaction after implantation of second-generation drug-eluting stents (2nd DES) and baremetal stents (BMS) in patients with ST-segment elevation myocardial infarction (STEMI) remains unclear. The MECHANISM pilot study is a multi-center prospective registry that enrolled 24 STEMI patients (from 11 centers) who had undergone implantation of everolimus-eluting ( n = 6), biolimus A9-eluting ( n = 6) or zotarolimus-eluting stents ( n = 6), or BMS ( n = 6). Scheduled optical coherence tomography (OCT ...
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    8. Low eicosapentaenoic acid to arachidonic acid ratio is associated with thin-cap fibroatheroma determined by optical coherence tomography

      Low eicosapentaenoic acid to arachidonic acid ratio is associated with thin-cap fibroatheroma determined by optical coherence tomography
      Background A low eicosapentaenoic acid (EPA)/arachidonic acid (AA) ratio is known to be associated with cardiovascular events. However, the relationship between the EPA/AA ratio and coronary plaque vulnerability assessed by optical coherence tomography (OCT) has not been examined thoroughly. This study examined the relationship between the EPA/AA ratio and coronary plaque vulnerability assessed by OCT in patients with acute coronary syndrome (ACS). Methods We evaluated 59 ACS ...
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    9. Neointimal coverage of zotarolimus-eluting stent at 1, 2, and 3 months' follow-up: an optical coherence tomography study

      Neointimal coverage of zotarolimus-eluting stent at 1, 2, and 3 months' follow-up: an optical coherence tomography study
      Incomplete neointimal coverage and malapposed struts after stenting are associated with increased risk of stent thrombosis. We aimed to evaluate neointimal coverage early after Resolute zotarolimus-eluting stent (R-ZES) implantation using optical coherence tomography (OCT). A total of 20 patients with de novo native coronary lesions with R-ZES were enrolled. Among these patients, 20 stented lesions in 19 patients were evaluated at 1, 2, and 3 months after R-ZES implantation. The ...
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    10. Neoatherosclerosis 16 years following bare-metal stent implantation: Different tissue components in different underlying lesions observed with optical coherence tomography

      Neoatherosclerosis 16 years following bare-metal stent implantation: Different tissue components in different underlying lesions observed with optical coherence tomography
      ...tasato University School of Medicine, Japan + Kitasato University School of Allied Health Sciences, Japan , * Junya Ako Affiliations + Department of Cardiovascular Medicine, Kitasato University School of Medicine, Japan ...
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    11. Feature Of The Week 6/14/09: Assessing Sirolimus-Eluting Stent Implantation by Optical Coherence Tomography

      Feature Of The Week 6/14/09: Assessing Sirolimus-Eluting Stent Implantation by Optical Coherence Tomography
      Feature Of The Week 6/14/09: Heart disease is a leading cause of death in the industrialize world. Since the early 1990's when the Palmaz bare medal stent was introduced, stents have continued to play a major role in the treatment of heart disease. The stent market is over $5B and there is intense pressure to improve stent technology from both a healthcare and market share perspective. Optical ...
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    12. Local Determinants of Thrombus Formation Following Sirolimus-Eluting Stent Implantation Assessed by Optical Coherence Tomography

      ... thrombus did not increase the risk of major adverse cardiac events. Hiromasa Otake, MD*, Junya Shite, MD*,*, Junya Ako, MD, Toshiro Shinke, MD*, Yusuke Tanino, MD*, Daisuke Ogasawara, MD*, Takahiro Sawada, MD*, Naoki Mi...
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    13. Local Determinants and Clinical Significance of Thrombus Formation Following Sirolimus-Eluting Stent Implantation: Insights from Optical Coherence Tomography Analysis

      Angioscopic analyses have shown the presence of subclinical thrombus in sirolimus-eluting stents (SES) is more common than the clinical incidence of stent thrombosis. However, the determinants and long term significance of subclinical thrombus remain unknown. Thirty five patients (44 stents) who received SES underwent 6 months follow-up optical coherence tomography (OCT). Patients were divided into 2 groups according to the presence of thrombus by OCT. Cross-sectional images were analyzed every ...
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    14. 1-13 of 13
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  2. About Junya Ako

    Junya Ako

    Junya Ako, MD, is with the Center for Cardiovascular Technology, Division of Cardiovascular Medicine at Stanford University. Dr Kao graduated from University of Tokyo School of Medicine in 1991. He completed his residency in internal medicine and fellowship in cardiovascular medicine at Mitsui Memorial Hospital in 1996. He continued his career as a cardiologist in University of Tokyo Hospital. In November 2001, he moved to Stanford University as a research fellow, where he participated in the IVUS analysis of sirolimus-eluting stents. His research interests include prevention of in-stent restenosis and analysis of drug-eluting stents.