著者

Motohisa Yamamoto Tetsuya Tabeya Yoshiharu Masaki Chisako Suzuki Yasuyoshi Naishiro Keisuke Ishigami Hidetaka Yajima Yui Shimizu Mikiko Obara Hiroyuki Yamamoto Toshiaki Sugaya Hiroki Takahashi Kohzoh Imai Yasuhisa Shinomura

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.51, no.3, pp.325-328, 2012 (Released:2012-02-01)

参考文献数

22

被引用文献数

10 11

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A 58-year-old woman with a three-year progressive history of chronic arthritis, had become disabled due to general malaise and fever. Her laboratory data revealed hyperuricemia and elevated levels of C-reactive protein. Neither rheumatoid factor nor anti-citrullinated peptide antibodies were present. We diagnosed her with tophaceous gout with uric crystalline revealed by the arthrocentesis of the elbow. 99mTc scintigraphy also disclosed a significant uptake in the cervical spine. The CT of the patient's cervical spine revealed significant bone erosion and destruction. We diagnosed the cervical involvement of gout based on the exclusion of infections and sarcoidosis. Rheumatologists should be aware of this rare association.

著者

Yoichiro Otaki Tetsu Watanabe Ryuhei Yamaguchi Shingo Tachibana Junya Sato Shigehiko Kato Harutoshi Tamura Satoshi Nishiyama Takanori Arimoto Hiroki Takahashi Masafumi Watanabe

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-23-0562, (Released:2023-11-17)

参考文献数

42

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Background: Heart failure with preserved ejection fraction (HFpEF) is an increasing health problem associated with high morbidity and mortality rates. Several reports have shown an association between hypokalemia and clinical outcomes in patients with heart failure (HF). However, the association of hypokalemia with kidney function and clinical outcomes in patients with HFpEF remains unclear.Methods and Results: We measured serum potassium levels and kidney function in 454 patients with HFpEF (mean age 76 years; 55% men) at admission. Hypokalemia (K+<3.5 mmol/L) and hyperkalemia (K+>5.0 mmol/L) were identified in 58 (12.7%) and 11 (2.4%) patients, respectively. Patients with hypokalemia showed renal tubular damage (RTD), defined as a urinary β2-microglobulin to creatinine ratio ≥300 μg/gCr, preserved estimated glomerular filtration rate (eGFR), and plasma volume expansion. Multivariate logistic analysis demonstrated that RTD, preserved eGFR, and plasma volume expansion were significantly associated with hypokalemia. During the median follow-up period of 1,000 days, 82 HF-related events occurred. Kaplan-Meier analysis showed that patients with hypokalemia had a higher rate of HF-related events than those without hypokalemia. Multivariate Cox proportional hazard regression analysis demonstrated that hypokalemia was significantly associated with HF-related events after adjusting for confounding factors.Conclusions: Hypokalemia is affected by kidney function, notably RTD, in patients with HFpEF. Hypokalemia is a risk factor for HF-related events in patients with HFpEF.

著者

Taro Narumi Tetsu Watanabe Shigehiko Kato Harutoshi Tamura Satoshi Nishiyama Hiroki Takahashi Takanori Arimoto Tetsuro Shishido Masafumi Watanabe

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.1, no.6, pp.255-260, 2019-06-10 (Released:2019-06-10)

参考文献数

24

被引用文献数

1

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Background:Insulin resistance as assessed using homeostasis model assessment ratio (HOMA-R) is associated with latent myocardial damage in apparently healthy subjects in health check. Meanwhile, diabetes mellitus (DM) is an unfavorable prognostic risk factor in patients with heart failure (HF). We examined the impact of pancreatic β-cell dysfunction on clinical outcomes in HF patients without DM.Methods and Results:This study enrolled 312 HF patients without DM. Pancreatic β-cell dysfunction was defined as HOMA-β <30%. A total of 108 patients (35%) had β-cell dysfunction. Plasma brain natriuretic peptide was higher in patients with pancreatic β-cell dysfunction compared with those without (625.2 vs. 399.0 pg/mL, P<0.001). On Kaplan-Meier analysis, a significantly higher cardiovascular events rate was observed in patients with pancreatic β-cell dysfunction (log-rank test, P=0.001), but there was no significant difference between patients with and without insulin resistance. On Cox hazard analysis, pancreatic β-cell dysfunction was independently associated with cardiovascular events after adjustment for confounding factors (HR, 1.58; 95% CI: 1.02–2.45), whereas insulin resistance was not associated with cardiovascular events.Conclusions:Pancreatic β-cell dysfunction, but not insulin resistance, was associated with unfavorable outcome in HF patients without DM.

著者

Miyuki Yokoyama Tetsu Watanabe Yoichiro Otaki Ken Watanabe Taku Toshima Takayuki Sugai Tetsuya Takahashi Daisuke Kinoshita Harutoshi Tamura Satoshi Nishiyama Hiroki Takahashi Takanori Arimoto Tetsuro Shishido Sou Yamauchi Tamon Yamanaka Takuya Miyamoto Isao Kubota

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-17-0731, (Released:2017-11-30)

参考文献数

34

被引用文献数

39

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Background:Peripheral artery disease (PAD) is an athero-occlusive disease and a known risk factor for cardiovascular events. The controlling nutritional status (CONUT) score and geriatric nutritional risk index (GNRI) are objective tools for evaluating malnutrition and are reportedly associated with poor clinical outcomes in patients with fatal diseases. However, the effect of malnutrition on the clinical outcomes in patients with PAD remains unclear.

著者

半貫 敏夫 高橋 弘樹 石鍋 雄一郎 佐野 雅史 平山 善吉 Toshio Hannuki Hiroki Takahashi Yuichiro Ishinabe Masashi Sano Zenkichi Hirayama

雑誌

南極資料 = Antarctic Record (ISSN:00857289)

巻号頁・発行日

vol.46, no.2A, pp.490-503, 2002-09

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南極昭和基地で約29年間使われてきた居住棟の主要構造部品、屋根、壁、床の各木質パネルの耐久性を評価するための曲げ強度試験を行った。その結果外気に接するパネルの構成材に部分的劣化が認められ、それが構造強度に影響していることが確かめられた。パネルの強度は総体的に落ちているとはいえ、設計強度はまだ十分に維持しており、南極で安全に使用できる構造性能を保っていることが確かめられた。 実験結果を整理すると、南極のような極限環境にある木質サンドイッチパネルの耐久性設計では、表面合板の保全が構造上最も重要な課題であることが分かった。

著者

Yuji Saito Yoichiro Otaki Tetsu Watanabe Masahiro Wanezaki Daisuke Kutsuzawa Shigehiko Kato Harutoshi Tamura Satoshi Nishiyama Takanori Arimoto Hiroki Takahashi Yoshiyuki Ueno Tsuneo Konta Masafumi Watanabe

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.4, no.5, pp.222-229, 2022-05-10 (Released:2022-05-10)

参考文献数

26

被引用文献数

1

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Background: Single nucleotide polymorphisms (SNPs) in nitric oxide synthase 3 (NOS3) are associated with cardiovascular risk factors. However, it is not clear whether the NOS3 SNP is a genetic risk factor for cardiovascular diseases.Methods and Results: This prospective cohort study included 2,726 subjects aged ≥40 years who participated in a community-based health checkup. We genotyped 639 SNPs, including 2 NOS3 SNPs (rs1799983 and rs1808593). All subjects were monitored prospectively over a median follow-up period of 16.0 years, with the endpoint being cardiovascular events, including cardiovascular death and/or non-fatal myocardial infarction. Kaplan-Meier analysis demonstrated that both rs1799983 GT/TT and rs1808593 GG carriers had a higher risk of the endpoint than non-carriers. Univariate and multivariate Cox proportional hazard regression analyses revealed that both rs1799983 GT/TT and rs1808593 GG were independently associated with cardiovascular events after adjusting for confounding risk factors. The net reclassification index and integrated discrimination index were significantly improved by the addition of NOS3 SNPs as cardiovascular risk factors.Conclusions:NOS3 gene polymorphisms could be genetic risk factors for cardiovascular events in the general Japanese population, and could be used to facilitate the early identification of individuals at high risk of cardiovascular events.

著者

Hiroki Takahashi Masayuki Nakajima

出版者

The Society for Art and Science

雑誌

芸術科学会論文誌 (ISSN:13472267)

巻号頁・発行日

vol.4, no.3, pp.101-107, 2005 (Released:2008-07-30)

参考文献数

20

被引用文献数

1 2

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本論文では,ディジタルカメラで撮影した画像中に存在する文字情報の抽出,認識,翻訳等の処理を行うシステムの構築を目指して,画像の高品質化によって認識性能を向上する手法を提案する.提案手法では,ディジタルカメラで撮影した文字列を含む画像に対し,JPEG圧縮によるノイズの削減とDCTの高周波成分復元による拡大,2値化処理を行い,市販の文字認識ソフトウエアを用いて文字認識を行った.画像の拡大では,拡大に伴うモスキートノイズやブロックノイズの影響が少ない拡大手法を提案する.文書画像をディジタルカメラで撮影した画像と看板やプレートに書かれた文字を撮影した画像に対して実験を行った.本報告では,画像の高品質化処理を目的としているため,文字の切り出しは手作業で行っている.これらの対象画像に対し,拡大処理を施さずに2値化処理を行った文字画像や共1次内挿法で拡大した画像と比べ,従来の文字認識技術を用いて文字認識率を向上することができた.

著者

Taku Shikama Yoichiro Otaki Tetsu Watanabe Hiroki Takahashi Tasuku Kurokawa Harutoshi Tamura Shigehiko Kato Satoshi Nishiyama Takanori Arimoto Masafumi Watanabe

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.4, no.8, pp.378-387, 2022-08-10 (Released:2022-08-10)

参考文献数

48

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Background: Lower extremity artery disease (LEAD) is an arterial occlusive disease characterized by an insufficient blood supply to the lower limb arteries. The H2FPEF score, comprising Heavy, Hypertensive, atrial Fibrillation, Pulmonary hypertension, Elder, and Filling pressure, has been developed to identify patients at high risk of heart failure (HF) with preserved ejection fraction. This study assessed the impact of modified H2FPEF scores on chronic limb-threatening ischemia (CLTI) in patients with LEAD.Methods and Results: This study was a prospective observational study. Because the definition of obesity differs by race, we calculated the modified H2FPEF score using a body mass index >25 kg/m2to define obesity in 293 patients with LEAD who underwent first endovascular therapy. The primary endpoints were newly developed and recurrent CLTI. The secondary endpoint was a composite of events, including mortality and rehospitalization due to worsening HF and/or CLTI. The modified H2FPEF score increased significantly with advancing Fontaine classes. Multivariate Cox proportional hazard analysis revealed that the modified H2FPEF score was an independent predictor of newly developed and recurrent CLTI and composite events. The net reclassification index and integrated discrimination improvement were significantly improved by adding the modified H2FPEF score to the basic predictors.Conclusions: The modified H2FPEF score was associated with LEAD severity and future CLTI development, suggesting that it could be a feasible marker for patients with LEAD.