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72 results on '"Takiguchi, Hiroshi"'

53. e-VLBI Activities in Japan

Author

Sekido, Mamoru, primary, Kawaguchi, Noriyuki, additional, Koyama, Yasuhiro, additional, Kimura, Moritaka, additional, Kondo, Tetsuro, additional, Takiguchi, Hiroshi, additional, Hobiger, Thomas, additional, Takefuji, Kazuhiro, additional, Ikeda, T., additional, Shimojo, Shinji, additional, OYAMA, Tomoaki, additional, Harai, Hiroaki, additional, Hara, Tetsuya, additional, Kono, Yusuke, additional, Kurihara, Shinobu, additional, Kokado, Kensuke, additional, Tanimoto, Daisuke, additional, Nozawa, Kentarou, additional, Takeuchi, Hiroshi, additional, Uose, Hisao, additional, Fujisawa, K., additional, and Takaba, Hiroshi, additional

Published
2009
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54. VLBI Measurements for Frequency Transfer

Author

Takiguchi, Hiroshi, primary, Koyama, Yasuhiro, additional, Ichikawa, Ryuichi, additional, Gotoh, Tadahiro, additional, Ishii, Atsutoshi, additional, Hobiger, Thomas, additional, and Hosokawa, Mizuhiko, additional

Published
2009
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58. Clinical evaluation of the effect of percutaneous transluminal angioplasty and intra-arterial papaverine infusion for the treatment of vasospasm following aneurysmal subarachnoid hemorrhage

Author

Katoh, Hiroshi, primary, Shima, Katsuji, additional, Shimizu, Akira, additional, Takiguchi, Hiroshi, additional, Miyazawa, Takahito, additional, Umezawa, Hitoshi, additional, Nawashiro, Hiroshi, additional, Ishihara, Shoichiro, additional, Kaji, Tatsumi, additional, Makita, Kohzoh, additional, and Tsuchiya, Kazuhiro, additional

Published
1999
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62. Two-dimensional array of silver nanoparticles

Author

Abe, Koji, primary, Hanada, Takeshi, additional, Yoshida, Yuji, additional, Tanigaki, Nobutaka, additional, Takiguchi, Hiroshi, additional, Nagasawa, Hiroshi, additional, Nakamoto, Masami, additional, Yamaguchi, Tomohiko, additional, and Yase, Kiyoshi, additional

Published
1998
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69. Development of novel ground-based microwave radiometer for earth science.

Author

Ichikawa, Ryuichi, Ujihara, Hideki, Satoh, Shinsuke, Amagai, Jun, Ohta, Yusaku, Miyahara, Basara, Munekane, Hiroshi, Nagasaki, Taketo, Tajima, Osamu, Araki, Kentaro, Tajiri, Takuya, Takiguchi, Hiroshi, Matsushima, Takeshi, Matsushima, Nobuo, Momotani, Tatsuya, and Utsunomiya, Kenji

Published
2019

70. Tetsu-to-Hagane

Author

KANZAKI, Fumiaki, primary, ITO, Yo, additional, UTAKOJI, Masaru, additional, TAKIGUCHI, Hiroshi, additional, MUKAEWAKI, Kimio, additional, ASANO, Takeshi, additional, FUKATSU, Seiji, additional, NIIYAMA, Eisuke, additional, TAKAMI, Katsumi, additional, OKUMOTO, Takeomi, additional, MORI, Ryutaro, additional, TANAKA, Toshiaki, additional, YANAGIMOTO, Samon, additional, HORI, Kiyoshi, additional, KAKIMI, Noboru, additional, FUJITA, Michitaka, additional, SHIRAIWA, Toshio, additional, FUJINO, Nobukatsu, additional, MATSUNO, Fumio, additional, TORIHATA, Toshio, additional, SERA, Shinichi, additional, MIZUKI, Isao, additional, KURAO, Mizunori, additional, TANIGUCHI, Kohei, additional, YAMAZAKI, Takao, additional, OGURI, Toyoko, additional, KIKUCHI, Toshiro, additional, WATANABE, Juro, additional, ARAKIDA, Yutaka, additional, KUDO, Koichi, additional, SAITO, Takushi, additional, YOSHIDA, Kiyosi, additional, and WAKASA, Noriaki, additional

Published
1965
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71. von Willebrand factor Ristocetin co-factor activity to von Willebrand factor antigen level ratio for diagnosis of acquired von Willebrand syndrome caused by aortic stenosis.

Author

Okubo N, Sugawara S, Fujiwara T, Sakatsume K, Doman T, Yamashita M, Goto K, Tateishi M, Suzuki M, Shirakawa R, Eura Y, Kokame K, Hayakawa M, Matsumoto M, Kawate Y, Miura M, Takiguchi H, Soga Y, Shirai S, Ando K, Arai Y, Nakayoshi T, Fukumoto Y, Takahama H, Yasuda S, Tamura T, Watanabe S, Kimura T, Yaoita N, Shimokawa H, Saiki Y, Kaikita K, Tsujita K, Yoshii S, Nakase H, Fujimaki SI, and Horiuchi H

Abstract

Background: Severe aortic stenosis (AS) causes acquired von Willebrand syndrome by the excessive shear stress-dependent cleavage of high molecular weight multimers of von Willebrand factor (VWF). While the current standard diagnostic method is so-called VWF multimer analysis that is western blotting under nonreducing conditions, it remains unclear whether a ratio of VWF Ristocetin co-factor activity (VWF:RCo) to VWF antigen levels (VWF:Ag) of <0.7, which can be measured with an automated coagulation analyzer in clinical laboratories and is used for the diagnosis of hereditary von Willebrand disease., Objectives: To evaluated whether the VWF:RCo/VWF:Ag is useful for the diagnosis of AS-induced acquired von Willebrand syndrome., Methods: VWF:RCo and VWF:Ag were evaluated with the VWF large multimer index as a reference, which represents the percentage of a patient's VWF high molecular weight multimer ratio to that of standard plasma in the VWF multimer analysis., Results: We analyzed 382 patients with AS having transaortic valve maximal pressure gradients of >30 mmHg, 27 patients with peripheral artery disease, and 46 control patients free of cardiovascular disease with osteoarthritis, diabetes, and so on. We assumed a large multimer index of <80% as loss of VWF large multimers since 59.0% of patients with severe AS had the indices of <80%, while no control patients or patients with peripheral artery disease, except for 2 patients, exhibited the indices of <80%. The VWF:RCo/VWF:Ag ratios, measured using an automated blood coagulation analyzer, were correlated with the indices (r s  = 0.470, P  < .001). When the ratio of <0.7 was used as a cut-off point, the sensitivity and specificity to VWF large multimer indices of <80% were 0.437 and 0.826, respectively., Conclusion: VWF:RCo/VWF:Ag ratios of <0.7 may indicate loss of VWF large multimers with high specificity, but low sensitivity. VWF:RCo/VWF:Ag ratios in patients with AS having a ratio of <0.7 may be useful for monitoring the loss of VWF large multimers during their clinical courses., (© 2023 The Author(s).)

Published
2023
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72. Percutaneous coronary intervention for delayed coronary obstruction due to endothelialization of self-expandable transcatheter heart valve: a case report.

Author

Takiguchi H, Yamaji K, Shirai S, and Ando K

Abstract

Background: Coronary obstruction is one of the serious complications associated with transcatheter aortic valve implantation (TAVI). Delayed coronary obstruction (DCO) is a rare manifestation of coronary obstruction., Case Summary: A 91-year-old woman was diagnosed with severe aortic stenosis. She underwent TAVI with a self-expandable valve, without any complications. After 8 months, she was readmitted to our hospital for effort angina. Transthoracic echocardiogram and myocardial scintigraphy suggested left coronary artery ischaemia. Computed tomography revealed that the transcatheter heart valve (THV) frame was covered with a low-density mass that occluded the left coronary sinus (LCS). Transoesophageal echocardiogram showed a Doppler signal flowing from the non-coronary sinus to the LCS through the roundabout route between the aortic wall and the THV. Percutaneous coronary intervention was performed for the roundabout route. Although intravascular ultrasound after the implantation of one drug-eluting stent showed the underexpansion of the stent, another stent deployment improved the expansion. After the procedure, her symptom improved., Discussion: Reportedly, the mechanism of DCO occurring months or years after TAVI is thought to be thrombus formation or THV endothelialization. In our case, the low-density mass was considered to be endothelium which developed along the THV frame. Low sinotubular junction height and higher THV position could be the underlying mechanisms of DCO. Percutaneous coronary intervention is a possible treatment option for DCO caused by THV endothelialization., (© The Author(s) 2020. Published by Oxford University Press on behalf of the European Society of Cardiology.)

Published
2020
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