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1,150 results on '"Nakajima, Hiroyuki"'

8. Multiscale Parareal Algorithm for Long-Time Mesoscopic Simulations of Microvascular Blood Flow in Zebrafish

Author

Blumers, Ansel, Yin, Minglang, Nakajima, Hiroyuki, Hasegawa, Yosuke, Li, Zhen, and Karniadakis, George Em

Subjects
Physics - Fluid Dynamics, Physics - Biological Physics, Physics - Computational Physics
Abstract

Various biological processes such as transport of oxygen and nutrients, thrombus formation, vascular angiogenesis and remodeling are related to cellular/subcellular level biological processes, where mesoscopic simulations resolving detailed cell dynamics provide a key to understanding and identifying the cellular basis of disease. To break this bottleneck and achieve a biologically meaningful timescale, we propose a multiscale parareal algorithm in which a continuum-based solver supervises a mesoscopic simulation in the time-domain. Using an iterative prediction-correction strategy, the parallel-in-time mesoscopic simulation supervised by its continuum-based counterpart can converge fast. The effectiveness of the proposed method is first verified in a time-dependent flow with a sinusoidal flowrate through a Y-shaped bifurcation channel. Physical quantities of interest including velocity, wall shear stress and flowrate are computed to compare against those of reference solutions, showing a less than 1% relative error on flowrate in the Newtonian flow and a less than 3\% relative error in the non-Newtonian blood flow. The proposed method is then applied to a large-scale mesoscopic simulation of microvessel blood flow in a zebrafish hindbrain for temporal acceleration. The time-dependent blood flow from heartbeats in this realistic vascular network of zebrafish hindbrain is simulated using dissipative particle dynamics as the mesoscopic model, which is supervised by a one-dimensional blood flow model (continuum-based model) in multiple temporal sub-domains. The computational analysis shows that the resulting microvessel blood flow converges to the reference solution after only two iterations. The proposed method is suitable for long-time mesoscopic simulations with complex fluids and geometries.

Published
2021

13. Modifiers of the Risk of Diabetes for Long-Term Outcomes After Coronary Revascularization: CREDO-Kyoto PCI/CABG Registry

Author

Kimura, Takeshi, Shiomi, Hiroki, Matsuda, Mitsuo, Takeuchi, Yuzo, Mitsuoka, Hirokazu, Uegaito, Takashi, Nakagawa, Yoshihisa, Tamura, Toshihiro, Konishi, Takashi, Ootani, Seiji, Fujiwara, Hisayoshi, Takatsu, Yoshiki, Sato, Yukihito, Taniguchi, Ryoji, Kataoka, Kazuaki, Inoko, Moriaki, Nohara, Ryuji, Nakano, Kimisato, Miyamoto, Syoichi, Kunihiko, Nagai, Murakami, Tomoyuki, Takeda, Teruki, Ishida, Katsuya, Nobuyoshi, Masakiyo, Yamaji, Kyohei, Yasumoto, Hitoshi, Iwabuchi, Masashi, Ando, Kenji, Domei, Takenori, Kato, Masayuki, Tatami, Ryozo, Shirotani, Manabu, Hattori, Ryuichi, Kita, Toru, Furukawa, Yutaka, Ehara, Natsuhiko, Kihara, Yasuki, Eizawa, Hiroshi, Kato, Hiroshi, Ishii, Katsuhisa, Aoyama, Takeshi, Sakurai, Takahiro, Kawanami, Masaki, Suyama, Tamaki, Tada, Eiji, Tanaka, Masaru, Inada, Tsukasa, Uzui, Hiroyasu, Nakano, Akira, Lee, Jong-Dae, Onodera, Tomoya, Takizawa, Akinori, Ryuzo, Nawada, Shinoda, Eiji, Takahashi, Masaaki, Yamada, Miho, Horie, Minoru, Yamamoto, Takashi, Takashima, Hiroyuki, Sakai, Hiroshi, Tamura, Takashi, Toyofuku, Mamoru, Kotoura, Hajime, Miura, Akira, Takahashi, Mamoru, Matoba, Yoshiki, Takumi, Takuro, Tei, Chuwa, Hamasaki, Shuichi, Doi, Osamu, Kambara, Hirofumi, Kaburagi, Satoshi, Sakamoto, Hiroki, Tada, Tomohisa, Mitsudo, Kazuaki, Kadota, Kazushige, Tada, Takeshi, Miki, Shinji, Mizoguchi, Tetsu, Akira, Yoshida, Kaneda, Kazuhisa, Ogawa, Hisao, Sugamura, Koichi, Sugiyama, Seigo, Doyama, Kiyoshi, Araki, Makoto, Suwa, Satoru, Sakata, Ryuzo, Ikeda, Tadashi, Marui, Akira, Minatoya, Kenji, Yamazaki, Kazuhiro, Onoe, Masahiko, Ogawa, Tatsuya, Yamanaka, Kazuo, Iwakura, Atsushi, Ohno, Nobuhisa, Fujiwara, Keiichi, Hanyu, Michiya, Soga, Kinji, Matsushita, Tsutomu, Nishiwaki, Noboru, Yoshida, Yuichi, Tamura, Nobushige, Okada, Yukikatsu, Nasu, Michihiro, Koyama, Tadaaki, Nakayama, Shogo, Tanaka, Kuniyoshi, Koshiji, Takaaki, Morioka, Koichi, Shimamoto, Mitsuomi, Yamazaki, Fumio, Terai, Yasuhiko, Nishizawa, Junichiro, Aota, Masaki, Kanemitsu, Naoki, Hara, Hiroyuki, Tabata, Takafumi, Imoto, Yutaka, Yamamoto, Hiroyuki, Matsuda, Katsuhiko, Nara, Masafumi, Tsuneyoshi, Hiroshi, Komiya, Tatsuhiko, Nakajima, Hiroyuki, Esaki, Jiro, Kawasuji, Michio, Moriyama, Syuji, Tambara, Keiichi, Arimura, Sakiko, Fujino, Yumika, Hanazawa, Miya, Hibi, Chikako, Kato, Risa, Kinoshita, Yui, Kitagawa, Kumiko, Kitamura, Masayo, Kuwahara, Takahiro, Sachiko, Maeda, Miki, Izumi, Minematsu, Saeko, Nishida, Satoko, Okamoto, Naoko, Saeki, Asuka, Sasae, Hitomi, Sato, Yuki, Takahashi, Asuka, Takinami, Emi, Tezuka, Saori, Tsuda, Marina, Tsumori, Miyuki, Uchida, Yuriko, Yamamoto, Yuko, Yamauchi, Misato, Yamazaki, Itsuki, Yoshimoto, Mai, Abe, Mitsuru, Fuki, Masayuki, Hayano, Mamoru, Kato, Eri, Kato, Yoshihiro, Matsumura-Nakano, Yukiko, Nakajima, Tetsu, Nakatsuma, Kenji, Natsuaki, Masahiro, Takeji, Yasuaki, Tazaki, Junichi, Tokushige, Akihiro, Watanabe, Hiroki, Yaku, Hidenori, Yamamoto, Erika, Yamamoto, Ko, Yamashita, Yugo, Yoshikawa, Yusuke, Morimoto, Takeshi, Kato, Eri T., Imada, Kazuaki, Nishikawa, Ryusuke, Mabuchi, Hiroshi, and Soga, Yoshiharu

Published
2022
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21. Prognostic ability of mid-term worsening renal function after percutaneous coronary intervention: findings from the SHINANO registry

Author

Okina, Yoshiteru, Miura, Takashi, Senda, Keisuke, Taki, Minami, Kobayashi, Masanori, Kanai, Masafumi, Okuma, Yukari, Yanagisawa, Takashi, Hashizume, Naoto, Otagiri, Kyuhachi, Shoin, Kyoko, Watanabe, Noboru, Ebisawa, Soichiro, Karube, Kenichi, Nakajima, Hiroyuki, Saigusa, Tatsuya, Miyashita, Yusuke, Kashiwagi, Daisuke, Machida, Keisuke, Abe, Naoyuki, Tachibana, Takahiro, Kanzaki, Yusuke, Maruyama, Takuya, Nomi, Hidetomo, Sakai, Takahiro, Yui, Hisanori, Mochidome, Tomoaki, Kobayashi, Takahiro, Kasai, Toshio, Ikeda, Uichi, and Kuwahara, Koichiro

Published
2021
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29. Evaluation of flow dynamics in distal stent graft‐induced new entry using 4D flow MRI.

Author

Sakakibara, Kenji, Nakajima, Hiroyuki, Hagihara, Yudai, Nakamura, Chie, Shikata, Daichi, Takesue, Yuki, Shiraiwa, Satoru, Honda, Yoshihiro, Kaga, Shigeaki, Hamasaki, Masahiro, and Johno, Hisashi

Subjects
*AORTIC dissection, *MAGNETIC resonance imaging, *SHEARING force, *SHEAR walls
Abstract

Key Clinical Message: Distal stent graft‐induced new entry may occur after stent grafting for aortic dissection. Four‐dimensional magnetic resonance imaging is useful for predicting outcomes, showing accelerated flow and increased wall shear stress, indicating further false lumen expansion. [ABSTRACT FROM AUTHOR]

Published
2024
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34. Prognostic Impact of Left Ventricular Ejection Fraction in Patients With Severe Aortic Stenosis

Author

Kimura, Takeshi, Taniguchi, Tomohiko, Shiomi, Hiroki, Saito, Naritatsu, Imai, Masao, Tazaki, Junichi, Toyota, Toshiaki, Higami, Hirooki, Kawaji, Tetsuma, Ando, Kenji, Shirai, Shinichi, Kourai, Kengo, Arita, Takeshi, Miura, Shiro, Yamaji, Kyohei, Aoyama, Takeshi, Kanamori, Norio, Onodera, Tomoya, Murata, Koichiro, Furukawa, Yutaka, Kitai, Takeshi, Kim, Kitae, Kadota, Kazushige, Kawase, Yuichi, Iwasaki, Keiichiro, Miyawaki, Hiroshi, Misao, Ayumi, Kuwayama, Akimune, Ohya, Masanobu, Shimada, Takenobu, Amano, Hidewo, Nakagawa, Yoshihisa, Izumi, Chisato, Miyake, Makoto, Amano, Masashi, Takahashi, Yusuke, Yoshikawa, Yusuke, Nishimura, Shunsuke, Kuroda, Maiko, Shirotani, Manabu, Mitsuoka, Hirokazu, Miki, Shinji, Mizoguchi, Tetsu, Kato, Masashi, Yokomatsu, Takafumi, Kushiyama, Akihiro, Yaku, Hidenori, Watanabe, Toshimitsu, Miyazaki, Shunichi, Hirano, Yutaka, Matsuda, Mitsuo, Matsuda, Shintaro, Sugioka, Sachiko, Inada, Tsukasa, Nagao, Kazuya, Takahashi, Naoki, Fukuchi, Kohei, Murakami, Tomoyuki, Mabuchi, Hiroshi, Takeda, Teruki, Sakaguchi, Tomoko, Maeda, Keiko, Yamaji, Masayuki, Maenaka, Motoyoshi, Tadano, Yutaka, Sakamoto, Hiroki, Takeuchi, Yasuyo, Motooka, Makoto, Nishikawa, Ryusuke, Eizawa, Hiroshi, Yamane, Keiichiro, Kawato, Mitsunori, Kinoshita, Minako, Aida, Kenji, Tamura, Takashi, Toyofuku, Mamoru, Takahashi, Kousuke, Ko, Euihong, Akao, Masaharu, Ishii, Mitsuru, Masunaga, Nobutoyo, Ogawa, Hisashi, Iguchi, Moritake, Unoki, Takashi, Takabayashi, Kensuke, Hamatani, Yasuhiro, Yamashita, Yugo, Inoko, Moriaki, Minamino-Muta, Eri, Kato, Takao, Himura, Yoshihiro, Ikeda, Tomoyuki, Ishii, Katsuhisa, Komasa, Akihiro, Sato, Yukihito, Hotta, Kozo, Tsuji, Shuhei, Hiraoka, Yuji, Higashitani, Nobuya, Kouchi, Ichiro, Kato, Yoshihiro, Ikeguchi, Shigeru, Inuzuka, Yasutaka, Nishio, Soji, Seki, Jyunya, Shinoda, Eiji, Yamada, Miho, Kawamoto, Akira, Maeda, Chiyo, Konishi, Takashi, Jinnai, Toshikazu, Sogabe, Kouji, Tachiiri, Michiya, Matsumura, Yukiko, Ota, Chihiro, Kitaguchi, Shoji, Morikami, Yuko, Sakata, Ryuzo, Minakata, Kenji, Minatoya, Kenji, Hanyu, Michiya, Yamazaki, Fumio, Koyama, Tadaaki, Komiya, Tatsuhiko, Yamanaka, Kazuo, Nishiwaki, Noboru, Nakajima, Hiroyuki, Ohnaka, Motoaki, Osada, Hiroaki, Meshii, Katsuaki, Saga, Toshihiko, Onoe, Masahiko, Nakayama, Shogo, Sakaguchi, Genichi, Iwakura, Atsushi, Shiraga, Kotaro, Ueyama, Koji, Fujiwara, Keiichi, Fukumoto, Atsushi, Park, Masaki, Nishizawa, Junichiro, Kitano, Mitsuru, Morimoto, Takeshi, Nakatsuma, Kenji, Sasa, Tomoki, Watanabe, Hirotoshi, Kuwabara, Yasuhide, Makiyama, Takeru, Ono, Koh, and Shizuta, Satoshi

Published
2018
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35. Beyond Abdominal Pain: Decoding the Mysteries of Nutcracker Syndrome.

Author

Al-Anbagi, Usamah, Saad, Abdulrahman, Nashwan, Abdulqadir J., and Nakajima, Hiroyuki

Subjects
NUTCRACKER syndrome, RENAL veins, MESENTERIC artery, ENDOVASCULAR surgery, ABDOMINAL aorta
Abstract

Nutcracker syndrome (NCS), a rare but impactful vascular condition, emerges from the compression of the left renal vein by adjacent major arteries, leading to a diverse array of symptoms such as hematuria, flank pain, and renal challenges. Highlighting the case of a 30‐year‐old male with an atypical presentation of NCS, this report explores the diagnostic complexities arising from its varied presentations and therapeutic options. It emphasizes the critical role of computed tomography (CT) in unveiling the underlying vascular constriction. Through this lens, the case underscores the necessity of considering NCS in the differential diagnosis of abdominal pain, advocating for a prompt and accurate diagnosis to guide effective management strategies, ranging from conservative approaches to surgical intervention. This stresses the importance of heightened awareness and ongoing research for optimizing patient outcomes in the face of this elusive condition. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Clinical impact of complete revascularization in elderly patients with multi-vessel coronary artery disease undergoing percutaneous coronary intervention: A sub-analysis of the SHINANO registry

Author

Harada, Mikiko, Miura, Takashi, Kobayashi, Takahiro, Kobayashi, Hideki, Kobayashi, Masanori, Nakajima, Hiroyuki, Kimura, Hikaru, Akanuma, Hiroshi, Mawatari, Eiichiro, Sato, Toshio, Hotta, Shoji, Kamiyoshi, Yuichi, Maruyama, Takuya, Watanabe, Noboru, Eisawa, Takayuki, Hashizume, Naoto, Ebisawa, Soichiro, Miyashita, Yusuke, and Ikeda, Uichi

Published
2017
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45. Comprehensive epigenome characterization reveals diverse transcriptional regulation across human vascular endothelial cells

Author

Nakato, Ryuichiro, Wada, Youichiro, Nakaki, Ryo, Nagae, Genta, Katou, Yuki, Tsutsumi, Shuichi, Nakajima, Natsu, Fukuhara, Hiroshi, Iguchi, Atsushi, Kohro, Takahide, Kanki, Yasuharu, Saito, Yutaka, Kobayashi, Mika, Izumi-Taguchi, Akashi, Osato, Naoki, Tatsuno, Kenji, Kamio, Asuka, Hayashi-Takanaka, Yoko, Wada, Hiromi, Ohta, Shinzo, Aikawa, Masanori, Nakajima, Hiroyuki, Nakamura, Masaki, McGee, Rebecca C., Heppner, Kyle W., Kawakatsu, Tatsuo, Genno, Michiru, Yanase, Hiroshi, Kume, Haruki, Senbonmatsu, Takaaki, Homma, Yukio, Nishimura, Shigeyuki, Mitsuyama, Toutai, Aburatani, Hiroyuki, Kimura, Hiroshi, and Shirahige, Katsuhiko

Published
2019
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