A
Akihide Umeki
Researcher at University of Tokyo
Publications - 23
Citations - 255
Akihide Umeki is an academic researcher from University of Tokyo. The author has contributed to research in topics: Ventricular assist device & Heart failure. The author has an hindex of 9, co-authored 18 publications receiving 227 citations.
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Journal ArticleDOI
Development of a novel drive mode to prevent aortic insufficiency during continuous-flow LVAD support by synchronizing rotational speed with heartbeat.
Yuichiro Kishimoto,Yoshiaki Takewa,Mamoru Arakawa,Akihide Umeki,Masahiko Ando,Takashi Nishimura,Yutaka Fujii,Toshihide Mizuno,Motonobu Nishimura,Eisuke Tatsumi +9 more
TL;DR: This novel drive mode may considerably benefit patients with severe heart failure on long-term LVAD support by preventing AI by providing both minimal support for early systole and maximal support shortly after aortic valve opening by changing the RS in synchronization with heartbeat.
Journal ArticleDOI
Alteration of LV end-diastolic volume by controlling the power of the continuous-flow LVAD, so it is synchronized with cardiac beat: development of a native heart load control system (NHLCS)
Akihide Umeki,Takashi Nishimura,Masahiko Ando,Yoshiaki Takewa,Kenji Yamazaki,Shunei Kyo,Minoru Ono,Tomonori Tsukiya,Toshihide Mizuno,Yoshiyuki Taenaka,Eisuke Tatsumi +10 more
TL;DR: It may be possible to achieve favorable EDV and native heart load by controlling the rotation of continuous-flow LVAD, so it is synchronized with the cardiac beat, according to the end-diastolic volume.
Journal ArticleDOI
Change in myocardial oxygen consumption employing continuous-flow LVAD with cardiac beat synchronizing system, in acute ischemic heart failure models.
Akihide Umeki,Takashi Nishimura,Yoshiaki Takewa,Masahiko Ando,Mamoru Arakawa,Yuichiro Kishimoto,Tomonori Tsukiya,Toshihide Mizuno,Shunei Kyo,Minoru Ono,Yoshiyuki Taenaka,Eisuke Tatsumi +11 more
TL;DR: Employing changeable MVO2 with NHLCS according to the patient’s condition may provide more opportunity for native heart recovery with LVAD, especially for patients with ischemic heart diseases.
Journal ArticleDOI
Change of Coronary Flow by Continuous-Flow Left Ventricular Assist Device With Cardiac Beat Synchronizing System (Native Heart Load Control System) in Acute Ischemic Heart Failure Model
Akihide Umeki,Takashi Nishimura,Masahiko Ando,Yoshiaki Takewa,Kenji Yamazaki,Shunei Kyo,Minoru Ono,Tomonori Tsukiya,Toshihide Mizuno,Yoshiyuki Taenaka,Eisuke Tatsumi +10 more
TL;DR: By using NHLCS to change CoF, recovery of native heart function with a LVAD has a better prognosis, and that CoF was greater in the counter-pulse mode and smaller in the co-p Pulse mode relative to the continuous mode.
Journal ArticleDOI
Rotational speed modulation used with continuous-flow left ventricular assist device provides good pulsatility.
Noritsugu Naito,Takashi Nishimura,Kei Iizuka,Yoshiaki Takewa,Akihide Umeki,Masahiko Ando,Minoru Ono,Eisuke Tatsumi +7 more
TL;DR: The co-pulse mode of this novel RS modulation system used with CF-LVAD (EVAHEART) may provide better pulsatility not only in the large vessels but also in the peripheral vasculature.