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K. Obase · SciRah

Researcher profile · Semantic Scholar

K. Obase

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K. Obase — researcher profile on SciRah

h-index: 11
Works: 90
Citations: 869

Most-cited papers

Comprehensive evaluation of left ventricular strain using speckle tracking echocardiography in normal adults: comparison of three-dimensional and two-dimensional approaches.
Ken Saito, H. Okura, N. Watanabe, A. Hayashida +6 more
2009Journal of the American Society of Echocardiography251 citations
Semantic Scholar
JCS/JSCS/JATS/JSVS 2020 Guidelines on the Management of Valvular Heart Disease.
C. Izumi, K. Eishi, K. Ashihara, T. Arita +30 more
2020Circulation Journal231 citations Open access
Semantic Scholar
Influence of chronic tethering of the mitral valve on mitral leaflet size and coaptation in functional mitral regurgitation.
Ken Saito, H. Okura, N. Watanabe, K. Obase +6 more
2012JACC Cardiovascular Imaging71 citations Open access
Semantic Scholar
Usefulness of CHADS2 score to predict C-reactive protein, left atrial blood stasis, and prognosis in patients with nonrheumatic atrial fibrillation.
Tomoko Maehama, H. Okura, Koichiro Imai, Ryotaro Yamada +6 more
2010American Journal of Cardiology41 citations
Semantic Scholar
Three-dimensional quantitation of mitral valve coaptation by a novel software system with transthoracic real-time three-dimensional echocardiography.
M. Tsukiji, N. Watanabe, Y. Yamaura, N. Okahashi +7 more
2008Journal of the American Society of Echocardiography40 citations
Semantic Scholar
Relationship Between Arterial and Fibrous Cap Remodeling: A Serial Three-Vessel Intravascular Ultrasound and Optical Coherence Tomography Study
Ryotaro Yamada, H. Okura, T. Kume, Ken Saito +10 more
2010Circulation. Cardiovascular Interventions26 citations Open access
Semantic Scholar
Elongation of chordae tendineae as an adaptive process to reduce mitral regurgitation in functional mitral regurgitation.
K. Obase, L. Weinert, Andrew Hollatz, F. Farooqui +9 more
2016European Heart Journal-Cardiovascular Imaging23 citations
Semantic Scholar
Visualization and measurement of mitral valve chordae tendineae using three-dimensional transesophageal echocardiography from the transgastric approach.
K. Obase, V. Jeevanandam, Ken Saito, Kimberly L. Kesner +10 more
2015Journal of the American Society of Echocardiography22 citations
Semantic Scholar
Assessment of atrial synchrony in paroxysmal atrial fibrillation and impact of pulmonary vein isolation for atrial dyssynchrony and global strain by three-dimensional strain echocardiography.
Yukari Kobayashi, H. Okura, Yuhei Kobayashi, Keisuke Okawa +6 more
2014Journal of the American Society of Echocardiography22 citations
Semantic Scholar
Portopulmonary hypertension associated with congenital absence of the portal vein treated with bosentan.
Tomoko Hino, A. Hayashida, N. Okahashi, N. Wada +6 more
2009Internal medicine16 citations Open access
Semantic Scholar
Spiral suspension, a novel repair technique for severe functional tricuspid regurgitation
K. Eishi, T. Miura, Ichiro Matsumaru, Kazuyoshi Tanigawa +1 more
2018Journal of Thoracic and Cardiovascular Surgery13 citations Open access
Semantic Scholar
Impact of Lesion Localization on Durability of Mitral Valve Repair in Infective Endocarditis.
T. Miura, K. Obase, Tsuneo Ariyoshi, Ichiro Matsumaru +6 more
2019Annals of Thoracic Surgery10 citations
Semantic Scholar
Quantitation of the Degree of Mitral Valve Prolapse by Novel Software System : New Insights From Transthoracic Real-Time Three-Dimensional Echocardiography
N. Watanabe, Y. Ogasawara, Ken Saito, Y. Yamaura +5 more
20078 citations Open access
Semantic Scholar
Minimally Invasive Valvular Surgery in the Elderly - Safety, Early Recovery, and Long-Term Outcomes.
K. Hisatomi, T. Miura, K. Obase, Ichiro Matsumaru +6 more
2022Circulation Journal7 citations Open access
Semantic Scholar
Echocardiographic visualization and quantification of mitral complex during mitral repair for severe functional mitral regurgitation.
K. Obase, Ichiro Matsumaru, T. Miura, K. Eishi
2017Journal of Thoracic and Cardiovascular Surgery7 citations Open access
Semantic Scholar
A case of platypnea orthodeoxia syndrome: a persistent history taking was the key to the diagnosis.
Takashi Ohfuji, Y. Obase, Masaki Ikeda, K. Obase +5 more
2012Internal medicine7 citations Open access
Semantic Scholar
Assessment of Mitral Valve Complex by Three-Dimensional Echocardiography: Therapeutic Strategy for Functional Mitral Regurgitation
Kiyoshi Yoshida, K. Obase
2012Journal of Cardiovascular Ultrasound6 citations Open access
Semantic Scholar
A new echocardiographic window to visualize the mitral valve complex during mitral valve repair for functional mitral regurgitation.
K. Obase, M. Komeda, H. Okura, Kiyoshi Yoshida
2012Journal of Thoracic and Cardiovascular Surgery6 citations Open access
Semantic Scholar
Leaflet-chordal relations in patients with primary and secondary mitral regurgitation.
K. Obase, L. Weinert, Andrew Hollatz, F. Farooqui +11 more
2015Journal of the American Society of Echocardiography5 citations
Semantic Scholar
Prognostic Implication of Three-Dimensional Mitral Valve Tenting Geometry in Dilated Cardiomyopathy.
Reiko Toida, N. Watanabe, K. Obase, Y. Nagata +9 more
2015Journal of Heart Valve Disease5 citations
Semantic Scholar
Very long-term outcomes of twisted auto-pericardial mitral annuloplasty
T. Miura, K. Obase, Ichiro Matsumaru, S. Yokose +6 more
2020General Thoracic and Cardiovascular Surgery4 citations
Semantic Scholar
Impaired coronary flow reserve in obstructive sleep apnea and its improvement after continuous positive airway pressure therapy: a transthoracic Doppler echocardiographic study
K. Obase, H. Okura, Keiji Mouri, Tomoko Maehama +6 more
2011Journal of Echocardiography4 citations
Semantic Scholar
Infant coronary artery bypass grafting completely under surgical microscope
Yusuke Iwata, T. Takeuchi, T. Konuma, K. Obase +1 more
2021JTCVS Techniques3 citations Open access
Semantic Scholar
Aortic regurgitation resulted from traumatic leaflet tear due to calcified amorphous tumour.
K. Obase, S. Kojima, S. Nakaji, T. Miura +1 more
2020European Heart Journal-Cardiovascular Imaging3 citations
Semantic Scholar
Valve-sparing aortic root re-implantation for commissural detachment with fibrous strand
Seiji Matsukuma, Taku Inoue, Kazuyoshi Tanigawa, T. Miura +5 more
2017General Thoracic and Cardiovascular Surgery3 citations
Semantic Scholar
Double-Orifice Tricuspid Valve Visualized by Three-Dimensional Transthoracic Echocardiography
K. Obase, K. Addetia, Kazue Takahashi, Katsunori Yamamoto +4 more
2016Journal of Cardiovascular Ultrasound3 citations Open access
Semantic Scholar
Visualization of Submitral Structure by Three‐Dimensional Transesophageal Echocardiography
K. Obase, M. Komeda, Ken Saito, Tomoko Tamada +6 more
2013Echocardiography3 citations
Semantic Scholar
Coronary microvascular endothelial function deteriorates late (12 months) after sirolimus-eluting stent implantation.
Yoshinori Miyamoto, H. Okura, T. Kume, T. Kawamoto +6 more
2010Journal of Cardiology3 citations Open access
Semantic Scholar
Arrested Embryonic Development of the Mitral Valve: A Rare Case of Congenital Mitral Stenosis Unveiled Through Multimodal Imaging.
Akinobu Miyazaki, K. Obase, K. Yamaguchi, Ken-ichi Imasaka +1 more
2025Heart, Lung and Circulation2 citations
Semantic Scholar
Left ventricular outflow tract obstruction related to systolic anterior motion of anomalous secondary chords.
K. Obase, K. Maemura, Ichiro Matsumaru, K. Eishi
2021European Journal of Cardio-Thoracic Surgery2 citations Open access
Semantic Scholar
Abstract 19024: Differences in Mitral Valve Marginal Chordae Tendineae Length in Patients with Functional and Degenerative Mitral Regurgitation Using 3D Transesophageal Echocardiography from the Transgastric Approach
K. Obase, L. Weinert, Kimberly L. Kesner, Aaron E. Barry +6 more
20142 citations
Semantic Scholar
Poster session Friday 13 December - PM: 13/12/2013, 14:00-18:00 * Location: Poster area
E. Caiani, A. Pellegrini, M. Carminati, R. Lang +496 more
20132 citations Open access
Semantic Scholar
Relation between progression of aortic valve sclerosis and carotid intima–media thickening in asymptomatic subjects with cardiovascular risk factors
Y. Yamaura, N. Watanabe, K. Obase, A. Hayashida +2 more
2010Journal of Echocardiography2 citations
Semantic Scholar
Diagnosis of Myocardial Viability by Fluorodeoxyglucose Distribution at the Border Zone of a Low Uptake Region
Eiji Toyota, T. Sone, Kunihiko Yoshikawa, H. Mimura +8 more
2010Yonsei medical journal2 citations Open access
Semantic Scholar
Sinus of Valsalva dilates disproportionately in aortic root aneurysm with moderate to severe aortic regurgitation: quantitative assessment by transesophageal echocardiography
Koichiro Imai, N. Watanabe, A. Hayashida, K. Obase +6 more
2009Journal of Echocardiography2 citations
Semantic Scholar
Current management of tricuspid regurgitation: a focus on the spiral suspension approach
K. Eishi, Junichiro Eishi, Ichiro Matsumaru, Mizuki Sumi +2 more
2024General Thoracic and Cardiovascular Surgery1 citations
Semantic Scholar
A Case of Surgical Repair for End-Stage Tricuspid Regurgitation with Severe Liver Dysfunction and Hepatic Encephalopathy
Junichiro Eishi, T. Miura, Ichiro Matsumaru, H. Taguchi +6 more
2022Japanese Journal of Cardiovascular Surgery1 citations Open access
Semantic Scholar
Mitral endocarditis in hypertrophic obstructive cardiomyopathy with leaflet perforation
H. Taguchi, S. Nakaji, Y. Tasaki, T. Shimada +6 more
2021General Thoracic and Cardiovascular Surgery1 citations
Semantic Scholar
Valve repair for aortic regurgitation of a bicuspid aortic valve with root dilatation late after an arterial switch operation
S. Nakaji, K. Obase, K. Eishi
2021JTCVS Techniques1 citations Open access
Semantic Scholar
A rare case of impending paradoxical embolism with a complex patent foramen ovale
Y. Yamaura, K. Obase, N. Watanabe, Kenzo Fukuhara +5 more
2012Journal of Echocardiography1 citations
Semantic Scholar
Poster session III * Friday 10 December 2010, 08:30-12:30
D. Guldbrand, O. Goetzsche, B. Eika, N. Watanabe +496 more
20101 citations
Semantic Scholar
Real-time three-dimensional echocardiographic evaluation of the mitral valve
K. Obase, N. Watanabe, Kiyoshi Yoshida
20091 citations
Semantic Scholar
Dynamic Change in the Mitral Valve Tenting as a Predictor of the Long-Term Prognosis in Patients With Decompensated Heart Failure
K. Obase, N. Watanabe, Y. Yamaura, M. Tsukiji +5 more
20081 citations Open access
Semantic Scholar
Rapid Progression of Aortic Valve Stenosis in Patients With Chronic Hemodialysis: Report of Two Cases
Y. Yamaura, N. Watanabe, Yuzuru Iino, M. Tsukiji +4 more
20081 citations Open access
Semantic Scholar
[Oral administration of beraprost sodium did not exacerbate pulmonary hypertension with CREST syndrome].
Katsuyuki Furukawa, Satoshi Ikeda, K. Obase, T. Muroya +4 more
2001Nihon Naika Gakkai zasshi. The Journal of the Japanese Society of Internal Medicine1 citations Open access
Semantic Scholar
Decreasing the Pressure Gradient of the Left Ventricular Outflow Tract by Single-lead VDD Pacing in a Patient with Hypertrophic Obstructive Cardiomyopathy
S. Ikeda, Takayuki Yoshinaga, K. Obase, K. Sonoda +8 more
19991 citations
Semantic Scholar
The relationship between new index (TEI index) and clinical course in patients with left ventricular dysfunction
Kosuke Shioguchi, S. Ikeda, N. Otsuka, K. Sonoda +5 more
19991 citations
Semantic Scholar
Papillary muscle relocation for mitral regurgitation attributable to flail but tethered commissure associated with a left ventricular aneurysm
H. Teratani, K. Eishi, K. Obase, Yuko Nakao +2 more
2025JTCVS Techniques0 citations Open access
Semantic Scholar
AORTIC LEAFLET ADAPTATION RELATIVE TO AORTIC ROOT DILATATION
Rosy Haruna Nishizawa, K. Obase, K. Eishi, Chisa Eguchi +5 more
2024Journal of the American College of Cardiology0 citations Open access
Semantic Scholar
Successful Tricuspidization of Bicuspid Aortic Valve Complicated by Anomalous Coronary Artery
K. Hisatomi, K. Eishi, Ichiro Matsumaru, K. Obase +1 more
2024Annals of Thoracic Surgery Short Reports0 citations Open access
Semantic Scholar

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Kiyoshi Yoshida×26
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Kiyoshi Yoshida — researcher profile on SciRah
H. Okura×19
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H. Okura — researcher profile on SciRah
K. Eishi×17
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K. Eishi — researcher profile on SciRah
N. Watanabe×14
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A. Hayashida — researcher profile on SciRah

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Ken Saito — researcher profile on SciRah

T. Kawamoto×10

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Yoji Neishi×10

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Koichiro Imai×7

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Koichiro Imai — researcher profile on SciRah

Tomoko Maehama×6

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Tomoko Maehama — researcher profile on SciRah