著者

Akiko Masumoto Hiroyuki Yamamoto Yasuyo Taniguchi Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-1050, (Released:2022-01-29)

参考文献数

3

被引用文献数

2

著者

Tatsuya Kokawa Hiroyuki Yamamoto Mitsuaki Itoh Akira Shimane Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.86, no.3, pp.474, 2022-02-25 (Released:2022-02-25)

参考文献数

3

被引用文献数

6

著者

Takahiro Sawada Kenzo Uzu Naoko Hashimoto Tetsuari Onishi Tomofumi Takaya Akira Shimane Yasuyo Taniguchi Yoshinori Yasaka Takeshi Ohara Hiroya Kawai

出版者

Japan Atherosclerosis Society

雑誌

Journal of Atherosclerosis and Thrombosis (ISSN:13403478)

巻号頁・発行日

pp.50807, (Released:2019-10-18)

参考文献数

41

被引用文献数

28

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Aim: So far, the mechanisms behind the cardiovascular benefits of sodium/glucose cotransporter 2 (SGLT2) inhibitors have not been fully clarified. Methods: In order to evaluate the effects of SGLT2 inhibitors on systemic hemodynamics, glucose metabolism, lipid profile, and endothelial function, 50 diabetic patients with established coronary artery disease (CAD) were included in this analysis and were given empagliflozin 10 mg/d. Cookie meal testing (carbohydrates: 75 g, fats: 28.5 g), endothelial function testing using flow-mediated dilatation (FMD), and body composition evaluation were performed before and after six months of treatment. Changes in %FMD between the treatment periods and its association with metabolic biomarkers were evaluated. Results: After six months of treatment, the body weight and body fat percentage decreased significantly, while the body muscle percentage increased significantly. The hemoglobin A1c level and fasting and postprandial plasma glucose levels were significantly decreased with treatment. Postprandial insulin secretion was also significantly suppressed and the insulin resistance index was significantly decreased. Furthermore, the fasting and postprandial triglyceride (TG) levels decreased significantly, while total ketone bodies increased significantly after the six-month treatment. While the plasma brain natriuretic peptide level was not changed, the C-reactive protein level was decreased and FMD was significantly improved after the six-month treatment. Multiple regression analysis showed that the strongest predictive factor of FMD improvement is change in the plasma TG levels. Conclusion: SGLT2 inhibitors improve multiple metabolic parameters. Of these, a reduction in plasma TGs was strongly associated with endothelial function recovery in diabetic patients with CAD, and this reduction may be related to the cardiovascular benefits of SGLT2 inhibitors.

著者

Hiroyuki Yamamoto Tomofumi Takaya Nobuyuki Takahashi Hiroshi Tsunamoto Hirohisa Murakami Hiroya Kawai

出版者

The Japanese Circulation Society

雑誌

Circulation Reports (ISSN:24340790)

巻号頁・発行日

vol.4, no.7, pp.333-334, 2022-07-08 (Released:2022-07-08)

著者

Akiko Masumoto Hiroyuki Yamamoto Yasuyo Taniguchi Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.86, no.7, pp.1144, 2022-06-24 (Released:2022-06-24)

参考文献数

3

被引用文献数

2

著者

Makoto Miyake Misa Takegami Yuki Obayashi Masashi Amano Takeshi Kitai Tomoyuki Fujita Tadaaki Koyama Hidekazu Tanaka Kenji Ando Tatsuhiko Komiya Masaki Izumo Hiroya Kawai Kiyoyuki Eishi Kiyoshi Yoshida Takeshi Kimura Ryuzo Nawada Tomohiro Sakamoto Yoshisato Shibata Toshihiro Fukui Kenji Minatoya Kenichi Tsujita Yasushi Sakata Tetsuya Kimura Kumiko Sugio Atsushi Takita Atsushi Iwakura Toshihiro Tamura Kunihiro Nishimura Yutaka Furukawa Chisato Izumi for the BPV-AF Registry Group

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-22-0226, (Released:2022-07-08)

参考文献数

28

被引用文献数

2

---

Background: Current guidelines equally recommend direct oral anticoagulants (DOACs) and warfarin for atrial fibrillation (AF) patients with a bioprosthetic valve (BPV); however, there are limited data comparing DOACs and warfarin in AF patients with an aortic BPV.Methods and Results: This post-hoc subgroup analysis of a multicenter, prospective, observational registry (BPV-AF Registry) aimed to compare DOACs and warfarin in AF patients with an aortic BPV. The primary outcome was a composite of stroke, systemic embolism, major bleeding, heart failure requiring hospitalization, all-cause death, or BPV reoperation. The analysis included 479 patients (warfarin group, n=258; DOAC group, n=221). Surgical aortic valve replacement was performed in 74.4% and 36.7% of patients in the warfarin and DOAC groups, respectively. During a mean follow up of 15.5 months, the primary outcome occurred in 45 (17.4%) and 32 (14.5%) patients in the warfarin and DOAC groups, respectively. No significant difference was found in the primary outcome between the 2 groups (adjusted hazard ratio: 0.88, 95% confidence interval: 0.51–1.50). No significant multiplicative interaction was observed between the anticoagulant effects and type of aortic valve procedure (P=0.577).Conclusions: Among AF patients with an aortic BPV, no significant difference was observed in the composite outcome of adverse clinical events between patients treated with warfarin and those treated with DOACs, suggesting that DOACs can be used as alternatives to warfarin in these patients.

著者

Yuta Fukuishi Hiroyuki Yamamoto Hirohisa Murakami Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.86, no.1, pp.169, 2021-12-24 (Released:2021-12-24)

参考文献数

1

被引用文献数

3

著者

Takahiro Sawada Kenzo Uzu Naoko Hashimoto Tetsuari Onishi Tomofumi Takaya Akira Shimane Yasuyo Taniguchi Yoshinori Yasaka Takeshi Ohara Hiroya Kawai

出版者

Japan Atherosclerosis Society

雑誌

Journal of Atherosclerosis and Thrombosis (ISSN:13403478)

巻号頁・発行日

vol.27, no.7, pp.644-656, 2020-07-01 (Released:2020-07-01)

参考文献数

41

被引用文献数

19 28

---

Aim: So far, the mechanisms behind the cardiovascular benefits of sodium/glucose cotransporter 2 (SGLT2) inhibitors have not been fully clarified. Methods: In order to evaluate the effects of SGLT2 inhibitors on systemic hemodynamics, glucose metabolism, lipid profile, and endothelial function, 50 diabetic patients with established coronary artery disease (CAD) were included in this analysis and were given empagliflozin 10 mg/d. Cookie meal testing (carbohydrates: 75 g, fats: 28.5 g), endothelial function testing using flow-mediated dilatation (FMD), and body composition evaluation were performed before and after six months of treatment. Changes in %FMD between the treatment periods and its association with metabolic biomarkers were evaluated. Results: After six months of treatment, the body weight and body fat percentage decreased significantly, while the body muscle percentage increased significantly. The hemoglobin A1c level and fasting and postprandial plasma glucose levels were significantly decreased with treatment. Postprandial insulin secretion was also significantly suppressed and the insulin resistance index was significantly decreased. Furthermore, the fasting and postprandial triglyceride (TG) levels decreased significantly, while total ketone bodies increased significantly after the six-month treatment. While the plasma brain natriuretic peptide level was not changed, the C-reactive protein level was decreased and FMD was significantly improved after the six-month treatment. Multiple regression analysis showed that the strongest predictive factor of FMD improvement is change in the plasma TG levels. Conclusion: SGLT2 inhibitors improve multiple metabolic parameters. Of these, a reduction in plasma TGs was strongly associated with endothelial function recovery in diabetic patients with CAD, and this reduction may be related to the cardiovascular benefits of SGLT2 inhibitors.

著者

Tatsuya Kokawa Hiroyuki Yamamoto Mitsuaki Itoh Akira Shimane Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-0750, (Released:2021-10-05)

参考文献数

3

被引用文献数

6

著者

Yuta Fukuishi Hiroyuki Yamamoto Hirohisa Murakami Hiroya Kawai Tomofumi Takaya

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-21-0651, (Released:2021-09-04)

参考文献数

1

被引用文献数

3

著者

Hiroyuki Yamamoto Tomofumi Takaya Shun Nagai Yu Takahashi Hiroya Kawai

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-20-1283, (Released:2021-02-11)

参考文献数

1

著者

Hidekazu Tanaka Kazuhiro Tatsumi Sei Fujiwara Takayuki Tsuji Akihiro Kaneko Keiko Ryo Yuko Fukuda Kensuke Matsumoto Mayumi Shigeru Akihiro Yoshida Hiroya Kawai Ken-ichi Hirata

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.76, no.2, pp.382-389, 2012 (Released:2012-01-25)

参考文献数

28

被引用文献数

33 38

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Background: Dyssynchrony has various detrimental effects on cardiac function, but its effect on cardiac sympathetic activity is not fully understood. Methods and Results: We studied 50 heart failure patients who underwent cardiac resynchronization therapy (CRT). Cardiac sympathetic activity was assessed by 123I-metaiodobenzylguanidine (123I-MIBG) scintigraphy as the delayed heart-to-mediastinum ratio (H/M ratio). Echocardiography was performed before and 7 months after CRT, and response was defined as a ≥15% decrease in end-systolic volume. Dyssynchrony was determined by the time difference between the anteroseptal-to-posterior wall using speckle-tracking radial strain (≥130ms predefined as significant). H/M ratio in patients with dyssynchrony was less than that in patients without dyssynchrony (1.62±0.31 vs. 1.82±0.36, P<0.05), even though ejection fraction was not significantly different (24±6% vs. 25±7%). Patients with dyssynchrony and H/M ratio ≥1.6 had a higher frequency of response to CRT (94%) and favorable long-term outcome over 3.0 years. In contrast, patients without dyssynchrony and H/M ratio <1.6 were more likely to show a lower frequency of response to CRT (0%) and unfavorable long-term outcome after CRT. Conclusions: Dyssynchrony is associated with cardiac sympathetic activity, and 123I-MIBG scintigraphy may be valuable for predicting the response to CRT. (Circ J 2012; 76: 382-389)