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Dive into the research topics where Seitarou Ebara is active.

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Featured researches published by Seitarou Ebara.


Heart and Vessels | 2014

Association between increased epicardial adipose tissue volume and coronary plaque composition

Kennosuke Yamashita; Myong Hwa Yamamoto; Seitarou Ebara; Toshitaka Okabe; Shigeo Saito; Koichi Hoshimoto; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Chiaki Obara; Masahiko Ochiai

To assess the relationship between epicardial adipose tissue volume (EATV) and plaque vulnerability in significant coronary stenosis using a 40-MHz intravascular ultrasound (IVUS) imaging system (iMap-IVUS), we analyzed 130 consecutive patients with coronary stenosis who underwent dual-source computed tomography (CT) and cardiac catheterization. Culprit lesions were imaged by iMap-IVUS before stenting. The iMAP-IVUS system classified coronary plaque components as fibrous, lipid, necrotic, or calcified tissue, based on the radiofrequency spectrum. Epicardial adipose tissue was measured as the tissue ranging from −190 to −30 Hounsfield units. EATV, calculated as the sum of the fat areas on short-axis images, was 85.0 ± 34.0 cm3. There was a positive correlation between EATV and the percentage of necrotic plaque tissue (R2 = 0.34, P < 0.01), while there was a negative correlation between EATV and the percentage of fibrous tissue (R2 = 0.24, P < 0.01). Multivariate analysis revealed that an increased low-density lipoprotein cholesterol level (β = 0.15, P = 0.03) and EATV (β = 0.14, P = 0.02) were independently associated with the percentage of necrotic plaque tissue. An increase in EATV was associated with the development of coronary atherosclerosis and, potentially, with the most dangerous type of plaque.


International Heart Journal | 2018

Association of Epicardial Adipose Tissue Volume and Total Coronary Plaque Burden in Patients with Coronary Artery Disease: Three-Vessel IVUS Analysis

Kennosuke Yamashita; Myong Hwa Yamamoto; Wataru Igawa; Morio Ono; Takehiko Kido; Seitarou Ebara; Toshitaka Okabe; Shigeo Saito; Kisaki Amemiya; Naoei Isomura; Hiroshi Araki; Masahiko Ochiai

The relationship between epicardial adipose tissue volume (EATV) and plaque vulnerability in non-culprit coronary lesions is not clearly understood.Fifty-four consecutive patients/158 lesions with suspected coronary artery disease underwent computed tomography (CT) and 40 MHz intravascular ultrasound imaging (iMap-IVUS) in cardiac catheterization. Cross-sectional CT slices were semiautomatically traced from base to apex of the heart. Using a 3D workstation, EATV was measured as the sum of fat areas (-190 to -30 Hounsfield units [HU]). All coronary vessels were imaged using iMap-IVUS before stenting to analyze coronary plaques as fibrotic, lipidic, necrotic, or calcified tissue.Mean EATV was 73.7 ± 24.6 (range: 30.2 to 131.8) mL. Patients were divided into two groups by mean EATV (group H: n = 27, EATV ≥ 73.7 mL; group L: n = 27, EATV < 73.7 mL). Total luminal volume, total vessel volume, and total plaque volume were significantly larger in group H. Fibrotic plaque and lipidic plaque volumes were also significantly larger in group H. There was a significant negative correlation between EATV and fibrous tissue (r = -0.31, P = 0.02) and a significant positive correlation between EATV and necrotic tissue (r = 0.37, P = 0.007). EATV was related to plaque with vulnerability in the right coronary artery (RCA) (r = 0.57, P = 0.04) and the left anterior descending artery (LAD) (r = 0.53, P = 0.02). In conclusion, increased EATV was associated with the total coronary plaque burden and composition, particularly in the RCA and LAD.


Circulation-cardiovascular Imaging | 2017

Serial 3-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated With Lesion Progression in Patients With Stable Angina PectorisCLINICAL PERSPECTIVE

Myong Hwa Yamamoto; Kennosuke Yamashita; Mitsuaki Matsumura; Akiko Fujino; Masaru Ishida; Seitarou Ebara; Toshitaka Okabe; Shigeo Saito; Koichi Hoshimoto; Kisaki Amemiya; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Chiaki Obara; Thomas McAndrew; Masahiko Ochiai; Gary S. Mintz; Akiko Maehara

Background— Optical coherence tomographic (OCT) morphologies associated with lesion progression are not well studied. The aim of this study was to determine the morphological change for untreated lesion progression using both OCT and intravascular ultrasound (IVUS). Methods and Results— We used baseline and 8-month follow-up 3-vessel OCT and IVUS to assess 127 nonculprit lesions (IVUS plaque burden ≥40%) in 45 patients with stable angina after target lesion treatment. Lesion progression was defined as an IVUS lumen area decrease >0.5 mm2. A layered pattern was identified as a superficial layer that had a different optical intensity and a clear demarcation from underlying plaque. Lesion progression was observed in 19% (24/127) lesions, and its pattern was characterized into 3 types: type I, new superficial layered pattern at follow-up that was not present at baseline (n=9); type II, a layered pattern at baseline whose layer thickness increased at follow-up (n=7); or type III, no layered pattern at baseline or follow-up (n=8). The increase of IVUS plaque+media area was largest in type I and least in type III (1.9 mm2 [1.6–2.1], 1.1 mm2 [0.9–1.4], and 0.3 mm2 [−0.2 to 0.8], respectively; P=0.002). Type III, but not types I or II, showed negative remodeling during follow-up (IVUS vessel area; from 14.3 mm2 [11.4–17.2] to 13.5 mm2 [10.4–16.7]; P=0.02). OCT lipidic plaque was associated with lesion progression (odds ratio, 13.6; 95% confidence interval, 3.7–50.6; P<0.001). Conclusions— Lesion progression was categorized to distinct OCT morphologies that were related to changes in plaque mass or vessel remodeling.


Journal of the American College of Cardiology | 2016

TCT-73 Serial Three-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated of Plaque Progression in Patients With Stable Angina Pectoris

Myong Hwa Yamamoto; Kennosuke Yamashita; Mitsuaki Matsumura; Seitarou Ebara; Toshitaka Okabe; Shigeo Saito; Koichi Hoshimoto; Kisaki Amemiya; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Chiaki Obara; Masahiko Ochiai; Gary S. Mintz; Akiko Maehara

nos: 73 76 TCT-73 Serial Three-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated of Plaque Progression in Patients With Stable Angina Pectoris Myong Hwa Yamamoto, kennosuke yamashita, Mitsuaki Matsumura, Seitarou Ebara, Toshitaka Okabe, Shigeo Saito, Koichi Hoshimoto, Kisaki Amemiya, Tadayuki Yakushiji, Naoei Isomura, Hiroshi Araki, Chiaki Obara, Masahiko Ochiai, Gary Mintz, Akiko Maehara Cardiovascular Research Foundation, New York, New York, United States; Showa University Northern Yokohama Hospital, Yokohama, Japan; Cardiovascular Research Foundation, New York, New York, United States; NorthPoint Solutions, LLC; Showa University Northern Yokohama Hospital, Tokyo, Japan; Showa University Northern Yokohama Hospital, Yokohama, Japan; CRF; Showa universty yohohama northern hospital, Yokohama, Japan; Showa University Northern Yokohama Hospital, Yokohama, Japan; Showa University Northern Yokohama Hospital, Yokohama, Japan; Showa Univ. Northern Yokohama Hospital, Yokohama, Japan; Ospedale Sacco Vialba; Showa University Northern Yokohama Hospital, Kanagawa, Japan; Cardiovascular Research Foundation, Washington, District of Columbia, United States; Cardiovascular Research Foundation, New York, New York, United States BACKGROUND OCT morphologies associated with plaque progression are not well-studied. METHODS We used baseline and 8-mo follow-up 3-vessel OCT and IVUS to assess 124 non-culprit lesions (IVUS plaque burden 40%) in 45 pts with stable angina after culprit lesion percutaneous coronary intervention. Plaque progression was defined as IVUS minimum lumen area decrease >0.5mm2. Lipid plaques by OCT were defined as signal-poor regions with diffuse borders. RESULTS Overall, 24/124 plaques progressed and were characterized by OCT as plaque rupture (n1⁄44), new layer appearance (n1⁄47), thickening of fibrous cap (n1⁄47), or no OCT morphological change with negative remodeling by IVUS (n1⁄46, vessel area at baseline 12.2 [9.9, 18.7]mm2 to follow-up; 10.2 [8.0, 18.5]mm2, p1⁄40.17) (Figure). Pts with plaque progression (n1⁄416) reported less statin use (31.3% vs. 72.4%, p1⁄40.007) and higher baseline LDL-C (110.0 vs. 87.0 mg/dL, p1⁄40.007) and hs-CRP (0.097 vs. 0.051 mg/dL, p1⁄40.004). Multivariable logistic regression analysis showed that lipid plaque by OCT was an independent predictor of plaque progression (OR: 10.2, p1⁄40.001). Progression (n[24) Non-progression


Journal of the American College of Cardiology | 2013

THE ASSOCIATION BETWEEN EPICARDIAL FAT VOLUME AND CORONARY ARTERY PLAQUE CHARACTERIZATION

Kennosuke Yamashita; Myong Hwa Yamamoto; Seitarou Ebara; Toshitaka Okabe; Koichi Hoshimoto; Shigeo Saito; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Chiaki Obara; Masahiko Ochiai

The aim of this study is to assess the relationship of EFV and plaque vulnerability using a 40MHz IVUS imaging system (iMap-IVUS) in significant coronary stenotic lesion. We analysed consecutive 130patients (94men and 36women) with suspected coronary artery disease who underwent dual-source CT (


Circulation-cardiovascular Imaging | 2017

Serial 3-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated With Lesion Progression in Patients With Stable Angina Pectoris

Myong Hwa Yamamoto; Kennosuke Yamashita; Mitsuaki Matsumura; Akiko Fujino; Masaru Ishida; Seitarou Ebara; Toshitaka Okabe; Shigeo Saito; Koichi Hoshimoto; Kisaki Amemiya; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Chiaki Obara; Thomas McAndrew; Masahiko Ochiai; Gary S. Mintz; Akiko Maehara


Journal of the American College of Cardiology | 2017

THE IMPACT OF RECANALIZATION OF CHRONIC TOTAL OCCULUDED CORONARY ARTERY ON ELECTROPHYSIOLOGICAL SUBSTRATE OF LEFT VENTRICLE

Kennosuke Yamashita; Masahiko Ochiai; Yuji Oyama; Wataru Igawa; Morio Ono; Takehiko Kido; Seitarou Ebara; Toshitaka Okabe; Myong Hwa Yamamoto; Shigeo Saito; Kisaki Amemiya; Naoei Isomura; Hiroshi Araki


Journal of the American College of Cardiology | 2017

CHRONIC STENT RECOIL DURING FOLLOW-UP IN SEVERELY CALCIFIED CORONARY ARTERY LESIONS: AN OPTICAL COHERENCE TOMOGRAPHY STUDY

Kisaki Amemiya; Akiko Maehara; Myong Hwa Yamamoto; Yuji Oyama; Wataru Igawa; Morio Ono; Kido Takehiko; Seitarou Ebara; Toshitaka Okabe; Kennosuke Yamashita; Shigeo Saito; Koichi Hoshimoto; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Gary Mintz; Masahiko Ochiai


Journal of the American College of Cardiology | 2016

TCT-239 Effect of Cutting Balloon after Rotablator in Severely Calcified Coronary Artery Lesions Assessed by Optical Frequency Domain Imaging

Kisaki Amemiya; Myong Hwa Yamamoto; Akiko Maehara; Yuji Oyama; Wataru Igawa; Morio Ono; Takehiko Kido; Seitarou Ebara; Toshitaka Okabe; Kennosuke Yamashita; Shigeo Saito; Koichi Hoshimoto; Tadayuki Yakushiji; Naoei Isomura; Hiroshi Araki; Gary S. Mintz; Masahiko Ochiai


Heart Lung and Circulation | 2015

Anti-inflammatory effect of colchicine in Japanese patients with stable coronary artery disease: A pilot study

Tadayuki Yakushiji; Morio Ono; Wataru Igawa; K. Takehiko; Seitarou Ebara; Toshitaka Okabe; Kennosuke Yamashita; Myong Hwa Yamamoto; Koichi Hoshimoto; Shigeo Saito; Kisaki Amemiya; Naoei Isomura; Hiroshi Araki; Masahiko Ochiai

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Shigeo Saito

Columbia University Medical Center

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Kisaki Amemiya

Memorial Hospital of South Bend

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