287 results on '"Bonpei Takase"'
Search Results
2. Editorial comments to 'Increased interleukin‐6 levels are associated with atrioventricular conduction delay in severe COVID‐19 patients'
- Author
-
Bonpei Takase and Nobuyuki Masaki
- Subjects
cardiovascular disease ,cytokines ,infectious disease ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
- Full Text
- View/download PDF
3. Reduced reactive hyperemia of the brachial artery in diabetic patients assessed by repeated measurements: The FMD‐J B study
- Author
-
Nobuyuki Masaki, Takeshi Adachi, Hirofumi Tomiyama, Takahide Kohro, Toru Suzuki, Tomoko Ishizu, Shinichiro Ueda, Tsutomu Yamazaki, Tomoo Furumoto, Kazuomi Kario, Teruo Inoue, Shinji Koba, Yasuhiko Takemoto, Takuzo Hano, Masataka Sata, Yutaka Ishibashi, Koichi Node, Koji Maemura, Yusuke Ohya, Taiji Furukawa, Hiroshi Ito, Yukihito Higashi, Akira Yamashina, and Bonpei Takase
- Subjects
clinical study ,diabetes mellitus ,endothelial function ,hyperglycemia ,reactive hyperemia ,Physiology ,QP1-981 - Abstract
Abstract Type 2 diabetes mellitus (T2DM) is a major cause of microvascular dysfunction. However, its effect on blood flow patterns during ischemic demand has not been adequately elucidated. In this study, we investigated the hypothesis that microvascular dysfunction in patients with T2DM manifests as brachial reactive hyperemia (BRH), defined as the ratio of peak blood flow velocities in a brachial artery before and after forearm cuff occlusion. The study enrolled 943 subjects (men, n = 152 [T2DM] and n = 371 [non‐T2DM]; women, n = 107 [T2DM] and n = 313 [non‐T2DM], respectively) with no history of cardiovascular disease. Semiautomatic measurements were obtained three times at 1.5‐year intervals to confirm the reproducibility of factors involved in BRH for each sex. An age‐adjusted mixed model demonstrated attenuated BRH in the presence of T2DM in both men (p = 0.022) and women (p = 0.031) throughout the study period. Post hoc analysis showed that the estimated BRH was significantly attenuated in patients with T2DM regardless of sex, except at baseline in women. In multivariate regression analysis, T2DM was a negative predictor of BRH at every measurement in men. For women, BRH was more strongly associated with alcohol consumption. Repeated measurements analysis revealed that T2DM was associated with attenuated postocclusion reactive hyperemia.
- Published
- 2023
- Full Text
- View/download PDF
4. Frequency of vaccine‐associated syncope after COVID‐19 vaccination in adolescents
- Author
-
Bonpei Takase, Tetsuya Hisada, Nobuyuki Masaki, Masayoshi Nagata, and Wataru Shimizu
- Subjects
anxiety ,side effect ,vaccine ,viral infection ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2022
- Full Text
- View/download PDF
5. Endothelial function is preserved in light to moderate alcohol drinkers but is impaired in heavy drinkers in women: Flow-mediated Dilation Japan (FMD-J) study.
- Author
-
Nozomu Oda, Masato Kajikawa, Tatsuya Maruhashi, Shinji Kishimoto, Farina Mohamad Yusoff, Chikara Goto, Ayumu Nakashima, Hirofumi Tomiyama, Bonpei Takase, Akira Yamashina, and Yukihito Higashi
- Subjects
Medicine ,Science - Abstract
Light to moderate alcohol consumption has protective effects on all-cause death and coronary artery disease in women. It is thought that light to moderate alcohol consumption has a beneficial effect on vascular function in women. We measured flow-mediated vasodilation (FMD) in 702 women aged 17-86 years who provided information on alcohol consumption. We divided the subjects into four groups: non-drinkers (0 g/week), light drinkers (>0 to 140 g/week), moderate drinkers (>140 to 280 g/week) and heavy drinkers (>280 g/week). There was no significant difference in FMD among the four groups. Multivariate regression analysis revealed that alcohol consumption in non-drinkers and light drinkers was not an independent predictor of FMD (β = -0.001, P = 0.98). We compared 50 moderate drinkers and 50 non-drinkers matched for age and medical histories and 22 heavy drinkers and 22 non-drinkers in matched pair analysis. There was no significant difference in FMD between moderate drinkers and non-drinkers (8.2±4.3% vs. 8.1±3.5, P = 0.91), while FMD in heavy drinkers was significantly lower than that in non-drinkers (5.9±2.5% vs. 8.9±3.5%, P = 0.002). These findings suggest that heavy alcohol consumption is associated with endothelial dysfunction but that light to moderate alcohol consumption is not associated with endothelial dysfunction in women. Clinical trial registration information This study was approved by principal authorities and ethical issues in Japan (University Hospital Medical Information Network UMIN000012952, 01/12/2009). www.umin.ac.jp/.
- Published
- 2020
- Full Text
- View/download PDF
6. Diagnostic Criteria of Flow‐Mediated Vasodilation for Normal Endothelial Function and Nitroglycerin‐Induced Vasodilation for Normal Vascular Smooth Muscle Function of the Brachial Artery
- Author
-
Tatsuya Maruhashi, Masato Kajikawa, Shinji Kishimoto, Haruki Hashimoto, Yuji Takaeko, Takayuki Yamaji, Takahiro Harada, Yiming Han, Yoshiki Aibara, Farina Mohamad Yusoff, Takayuki Hidaka, Yasuki Kihara, Kazuaki Chayama, Ayumu Nakashima, Chikara Goto, Hirofumi Tomiyama, Bonpei Takase, Takahide Kohro, Toru Suzuki, Tomoko Ishizu, Shinichiro Ueda, Tsutomu Yamazaki, Tomoo Furumoto, Kazuomi Kario, Teruo Inoue, Shinji Koba, Kentaro Watanabe, Yasuhiko Takemoto, Takuzo Hano, Masataka Sata, Yutaka Ishibashi, Koichi Node, Koji Maemura, Yusuke Ohya, Taiji Furukawa, Hiroshi Ito, Hisao Ikeda, Akira Yamashina, and Yukihito Higashi
- Subjects
diagnostic criteria ,endothelial function ,flow‐mediated vasodilation ,nitroglycerin‐induced vasodilation ,vascular smooth muscle function ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background Diagnostic criteria of flow‐mediated vasodilation (FMD), an index of endothelial function, and nitroglycerin‐induced vasodilation (NID), an index of vascular smooth muscle function, of the brachial artery have not been established. The purpose of this study was to propose diagnostic criteria of FMD and NID for normal endothelial function and normal vascular smooth muscle function. Methods and Results We investigated the cutoff values of FMD and NID in subjects with (risk group) and those without cardiovascular risk factors or cardiovascular diseases (no‐risk group) in 7277 Japanese subjects (mean age 51.4±10.8 years) from the Flow‐Mediated Dilation Japan study and the Flow‐Mediated Dilatation Japan Registry study for analysis of the cutoff value of FMD and in 1764 Japanese subjects (62.2±16.1 years) from the registry of Hiroshima University Hospital for analysis of the cutoff value of NID. Receiver‐operator characteristic curve analysis of FMD to discriminate subjects in the no‐risk group from patients in the risk group showed that the optimal cutoff value of FMD to diagnose subjects in the no‐risk group was 7.1%. Receiver‐operator characteristic curve analysis of NID to discriminate subjects in the no‐risk group from patients in the risk group showed that the optimal cutoff value of NID to diagnose subjects in the no‐risk group was 15.6%. Conclusions We propose that the cutoff value for normal endothelial function assessed by FMD of the brachial artery is 7.1% and that the cutoff value for normal vascular smooth muscle function assessed by NID of the brachial artery is 15.6% in Japanese subjects. Clinical Trial Registration www.umin.ac.jp Unique identifiers: UMIN000012950, UMIN000012951, UMIN000012952, and UMIN000003409
- Published
- 2020
- Full Text
- View/download PDF
7. Association between Smoking and Urine Indole Levels Measured by a Commercialized Test
- Author
-
Masataka Mine, Nobuyuki Masaki, Takumi Toya, Takayuki Namba, Yuji Nagatomo, Bonpei Takase, and Takeshi Adachi
- Subjects
metabolism ,indole ,smoking ,clinical studies ,Microbiology ,QR1-502 - Abstract
Indoles are formed from dietary tryptophan by tryptophanase-positive bacterium. A few amounts of indole are excreted in the urine. On the other hand, cigarette smoke contains indoles, which could also change the urine indole levels. This study sought to elucidate the relationship between urine indole levels and smoking habits. A total of 273 healthy men (46 ± 6 years old) were enrolled in the study. Fasting urine and blood samples were obtained in the morning. The indole concentration was measured by a commercialized kit with a modified Kovac’s reagent. The relationship with smoking status was evaluated. The median value of the urine indole test was 29.2 mg/L (interquartile range; 19.6–40.8). The urine indole level was significantly elevated in the smoking subjects (non-smoking group, 28.9 (20.9–39.1) mg/L, n = 94; past-smoking group, 24.5 (15.7–35.5) mg/L, n = 108; current-smoking group, 34.3 (26.9–45.0) mg/L, n = 71). In the current-smoking group, urine indole levels correlated with the number of cigarettes per day (ρ = 0.224, p = 0.060). A multivariate regression test with stepwise method revealed that the factors relating to urine indole level were current smoking (yes 1/no 0) (standardized coefficient β = 0.173, p = 0.004), blood urea nitrogen (β = 0.152, p = 0.011), and triglyceride (β = −0.116, p = 0.051). The result suggests that smoking is associated with increased urine indole levels. The practical test might be used as a screening tool to identify the harmful effect of smoking.
- Published
- 2022
- Full Text
- View/download PDF
8. Brachial‐Ankle Pulse Wave Velocity Versus Its Stiffness Index β‐Transformed Value as Risk Marker for Cardiovascular Disease
- Author
-
Hirofumi Tomiyama, Toshiaki Ohkuma, Toshiharu Ninomiya, Hiroki Nakano, Chisa Matsumoto, Alberto Avolio, Takahide Kohro, Yukihito Higashi, Tatsuya Maruhashi, Bonpei Takase, Toru Suzuki, Tomoko Ishizu, Shinichiro Ueda, Tsutomu Yamazaki, Tomoo Furumoto, Kazuomi Kario, Teruo Inoue, Shinji Koba, Yasuhiko Takemoto, Takuzo Hano, Masataka Sata, Yutaka Ishibashi, Koichi Node, Koji Maemura, Yusuke Ohya, Taiji Furukawa, Hiroshi Ito, Taishiro Chikamori, and Akira Yamashina
- Subjects
arterial stiffness ,blood pressure ,hypertension ,organ damage ,stiffness index β ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background The difference in the predictive ability of the brachial‐ankle pulse wave velocity (baPWV) and its stiffness index β‐transformed value (β‐baPWV, ie, baPWV adjusted for the pulse pressure) for the development of pathophysiological abnormalities related to cardiovascular disease or future occurrence of cardiovascular disease was examined. Methods and Results In study 1, a 7‐year prospective observational study in cohorts of 3274 men and 3490 men, the area under the curve in the receiver operator characteristic curve analysis was higher for baPWV than for β‐baPWV for predicting the development of hypertension (0.73, 95% CI=0.70 to 0.75 versus 0.59, 95% CI=0.56 to 0.62; P
- Published
- 2019
- Full Text
- View/download PDF
9. Endothelial Insulin Resistance of Freshly Isolated Arterial Endothelial Cells From Radial Sheaths in Patients With Suspected Coronary Artery Disease
- Author
-
Nobuyuki Masaki, Yasuo Ido, Toshiyuki Yamada, Youhei Yamashita, Takumi Toya, Bonpei Takase, Naomi M. Hamburg, and Takeshi Adachi
- Subjects
arterial stiffness ,endothelial nitric oxide synthase ,insulin resistance ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background Endothelial insulin resistance is insulin‐insensitivity in the vascular endothelium and can be observed in experimental models. This study aimed to investigate endothelial insulin resistance in patients with suspected coronary artery disease. To this end, a novel method of obtaining freshly isolated arterial endothelial cells from a radial catheter sheath was developed. Methods and Results Freshly isolated arterial endothelial cells were retrieved from catheter sheaths placed in radial arteries for coronary angiography (n=69, patient age 64±12 years). The endothelial cells were divided into groups for incubation with or without insulin, vascular endothelial growth factor, or acetylcholine. The intensity of phosphorylated endothelial nitric oxide synthase at Ser1177 (p‐eNOS) was quantified by immunofluorescence microscopy. The percentage increase of insulin‐induced phosphorylated endothelial nitric oxide synthase correlated negatively with derivatives of reactive oxygen metabolites, an oxidative stress test (r=−0.348, n=53, P=0.011), E/E′, an index of left ventricular diastolic dysfunction in Doppler echocardiography (ρ=−0.374, n=49, P=0.008), and log‐transformed brain natriuretic peptide (r=−0.266, n=62, P=0.037). Furthermore, percentage increase of insulin‐induced p‐eNOS was an independent factor for the cardio‐ankle vascular index (standardized coefficient β=−0.293, n=42, P=0.021) in the multivariate regression analysis of adaptive least absolute shrinkage and selection operator. Conclusions Our results suggested that endothelial insulin resistance is associated with oxidative stress, left ventricular diastolic dysfunction, heart failure, and arterial stiffness.
- Published
- 2019
- Full Text
- View/download PDF
10. P10 COMBINATION OF FLOW-MEDIATED DILATION AND PULSE WAVE VELOCITY PROVIDES FURTHER CARDIOVASCULAR RISK STRATIFICATION IN PATIENTS WITH CORONARY ARTERY DISEASE: FLOW-MEDIATED DILATION JAPAN STUDY A (FMD-J A)
- Author
-
Yukihito Higashi, Tatsuya Maruhashi, Hirofumi Tomiyama, Bonpei Takase, Toru Suzuki, Yasuki Kihara, and Akira Yamashina
- Subjects
Specialties of internal medicine ,RC581-951 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Purpose/Background/Objective: The usefulness of vascular function tests for management of patients with coronary artery disease (CAD) has not been fully investigated. Methods: We measured flow-mediated vasodilation (FMD) and brachial-ankle pulse wave velocity (baPWV) in 462 patients with CAD for assessment of the predictive value of FMD and baPWV for cardiovascular events in a prospective multicenter observational study. The first primary outcome was coronary events, and the second primary outcome was a composite of coronary events, stroke, heart failure, and sudden death. Results: A median follow-up period was 49.2 months. First primary outcome occurred in 56 patients and the second primary outcome occurred in 66 patients. FMD above the cutoff value of 7.1%, derived from receiver-operator curve analyses for the first and second primary outcomes, was significantly associated with lower risk of the first (hazard ratio [HR], 0.27; 95% confidence interval [CI], 0.06–0.74; P = 0.008) and second (HR, 0.32; 95% CI, 0.09–0.79; P = 0.01) primary outcomes. baPWV above the cutoff value of 1731 cm/s was significantly associated with higher risk of the first (HR, 1.86; 95% CI, 1.01–3.44; P = 0.04) and second (HR, 2.19; 95% CI, 1.23–3.90; P = 0.008) primary outcomes. Among the four groups stratified according to the combination of cutoff values of FMD and baPWV, stepwise increases in the calculated risk ratio for the first and second primary outcomes were observed. Conclusions: Both FMD and baPWV were independent predictors of cardiovascular events in patients with CAD. The combination of FMD and baPWV provided further cardiovascular risk stratification.
- Published
- 2018
- Full Text
- View/download PDF
11. Endothelial Dysfunction, Increased Arterial Stiffness, and Cardiovascular Risk Prediction in Patients With Coronary Artery Disease: FMD‐J (Flow‐Mediated Dilation Japan) Study A
- Author
-
Tatsuya Maruhashi, Junko Soga, Noritaka Fujimura, Naomi Idei, Shinsuke Mikami, Yumiko Iwamoto, Akimichi Iwamoto, Masato Kajikawa, Takeshi Matsumoto, Nozomu Oda, Shinji Kishimoto, Shogo Matsui, Haruki Hashimoto, Yoshiki Aibara, Farina Mohamad Yusoff, Takayuki Hidaka, Yasuki Kihara, Kazuaki Chayama, Kensuke Noma, Ayumu Nakashima, Chikara Goto, Hirofumi Tomiyama, Bonpei Takase, Takahide Kohro, Toru Suzuki, Tomoko Ishizu, Shinichiro Ueda, Tsutomu Yamazaki, Tomoo Furumoto, Kazuomi Kario, Teruo Inoue, Shinji Koba, Kentaro Watanabe, Yasuhiko Takemoto, Takuzo Hano, Masataka Sata, Yutaka Ishibashi, Koichi Node, Koji Maemura, Yusuke Ohya, Taiji Furukawa, Hiroshi Ito, Hisao Ikeda, Akira Yamashina, and Yukihito Higashi
- Subjects
arterial stiffness ,coronary artery disease ,endothelial function ,flow‐induced dilation ,pulse wave velocity ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background The usefulness of vascular function tests for management of patients with a history of coronary artery disease is not fully known. Methods and Results We measured flow‐mediated vasodilation (FMD) and brachial–ankle pulse wave velocity (baPWV) in 462 patients with coronary artery disease for assessment of the predictive value of FMD and baPWV for future cardiovascular events in a prospective multicenter observational study. The first primary outcome was coronary events, and the second primary outcome was a composite of coronary events, stroke, heart failure, and sudden death. During a median follow‐up period of 49.2 months, the first primary outcome occurred in 56 patients and the second primary outcome occurred in 66 patients. FMD above the cutoff value of 7.1%, derived from receiver‐operator curve analyses for the first and second primary outcomes, was significantly associated with lower risk of the first (hazard ratio, 0.27; 95% confidence interval, 0.06–0.74; P=0.008) and second (hazard ratio, 0.32; 95% confidence interval, 0.09–0.79; P=0.01) primary outcomes. baPWV above the cutoff value of 1731 cm/s was significantly associated with higher risk of the first (hazard ratio, 1.86; 95% confidence interval, 1.01–3.44; P=0.04) and second (hazard ratio, 2.19; 95% confidence interval, 1.23–3.90; P=0.008) primary outcomes. Among 4 groups stratified according to the combination of cutoff values of FMD and baPWV, stepwise increases in the calculated risk ratio for the first and second primary outcomes were observed. Conclusions In patients with coronary artery disease, both FMD and baPWV were significant predictors of cardiovascular events. The combination of FMD and baPWV provided further cardiovascular risk stratification. Clinical Trial Registration URL: www.umin.ac.jp. Unique identifier: UMIN000012950.
- Published
- 2018
- Full Text
- View/download PDF
12. No Widening of QT Interval during Bradycardia
- Author
-
Bonpei Takase, MD
- Subjects
Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2011
- Full Text
- View/download PDF
13. Characteristic Changes in Heart Rate Variability Indices during Hemorrhagic Shock, and Effect of Liposome-Encapsulated Hemoglobin in Rats
- Author
-
Yashiro Nogami, MD, Bonpei Takase, MD, Manabu Kinoshita, MD, Satoshi Shono, MD, Shinichi Kaneda, PhD, Masayuki Ishihara, PhD, Makoto Kikuchi, PhD, and Tadaaki Maehara, MD
- Subjects
Bleeding ,Red blood cell ,Resuscitation ,Autonomic nervous system ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Many compensatory mechanisms exit in hemorrhagic shock (HS). To characterize the efficacy of the new artificial oxygen carrier, liposome-encapsulated hemoglobin (LHb), HS was induced by withdrawing 20% of the total blood volume from rats. Rats received one of five interventions: LHb resuscitation (LHb-G, n = 7), normal saline (Saline-G, n = 7), shed autologous blood (SAB-G, n = 7), volume expander of 5% albumin (Albumin-G, n = 7), or no treatment (Sham-G, n = 7). Heart rate variability (HRV) indices were measured, including low frequency (LF, 0.10–0.60 Hz), high frequency (HF, 0.60–2.00 Hz), and the ratio of LF to HF (LF/HF). LF and LF/HF following HS were lower in the LHb-G and SAB-G groups when compared with the Saline-G, Albumin-G and Sham-G groups. LF and LF/HF following HS in the LHb-G group were comparable with that of the SAB-G group. These data demonstrate that HS-induced changes can be attenuated by resuscitation with LHb as well as SAB. LHb could be used as a substitute for blood transfusion for HS.
- Published
- 2010
- Full Text
- View/download PDF
14. Role of Heart Rate Variability in Non-Invasive Electrophysiology: Prognostic Markers of Cardiovascular Disease
- Author
-
Bonpei Takase, MD, FJCC, FACC, FAHA
- Subjects
Sudden cardiac death ,Intensive care medicine ,Heart diseases ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Conventional heart rate variability (HRV) indices comprise time domain and frequency domain HRV indices that not only reflect the autonomic control of the heart but also serve as prognostic markers of various cardiovascular disorders. These indices have been extensively investigated as prognostic factors for patients who develop coronary artery diseases including myocardial infarction (MI). Non-linear indices of HRV such as the long (β)- and short (α1 and β2)-term fractal component indices and approximate entropy analysis have been clinically applied. In addition, heart rate turbulence (HRT) and the deceleration capacity (DC) of heart rate have been studied as potential HRV indices for predicting untoward outcomes of cardiovascular diseases. This overview examines HRV indices and their roles in the setting of cardiovascular disorders including sudden cardiac death. We describe changes in HRV indices and clarify the relationship between prognosis and the indices in critically ill patients admitted to intensive care units.
- Published
- 2010
- Full Text
- View/download PDF
15. Effect of Lateral Body Position on Heart Rate Variability in Patients with Sleep Apnea Syndrome
- Author
-
Takako Urabe, RN, Bonpei Takase, MD, Yumi Tomiyama, RN, Yumiko Maeda, RN, Yoshiko Ishikawa, RN, Hidemi Hattori, PhD, Akimi Uehata, MD, and Masayuki Ishihara, PhD
- Subjects
Autonomic nerve activity ,Body posture ,Hypoxia ,Apnea ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Sleep apnea syndrome (SAS) can exacerbate cardiovascular disease by augmenting activity of the sympathetic nervous system. One method of treating SAS is via modulation of body posture. Therefore, the goal of the present study was to investigate whether assuming the lateral position during sleep can influence autonomic nervous system activity, as assessed by measurement of heart rate variability (HRV). Six patients with coronary artery disease (CAD) complicated by SAS underwent serial measurements of HRV and arterial blood oxygen saturation (SPO2) during sleep. Online analyses for HRV was performed using five consecutive RR intervals from electrocardiography using the modified Maximum Entropy Method. Low frequency spectra (LF, 0.04–0.15 Hz), high frequency spectra (HF, 0.15–0.40 Hz) and the ratio of low and high frequency spectra (LF/HF ratio) were continuously calculated. HRV and SPO2 measurements were performed after 30 min of sleep in different sleeping positions (supine vs. lateral) with or without supplementary oxygen administration by nasal cannula. The LF and LF/HF ratio were significantly smaller in the lateral position with and without oxygen when compared with the supine position with or without oxygen (LF: Supine to Lateral position, from 673 ± 643 ms2/Hz to 201 ± 221 ms2/Hz, P < 0.05; Supine to Lateral position with supplementary oxygen, from 617 ± 511 ms2/Hz to 288 ± 389 ms2/Hz, P < 0.05; LF/HF ratio: Supine to Lateral position, from 9.4 ± 643 to 2.9 ± 1.9, P < 0.05; Supine to Lateral position with supplementary oxygen, from 6.1 ± 3.5 to 2.3 ± 1.5, P < 0.05). Further, arterial blood oxygen saturation was higher in the lateral position than in the supine position and was higher with supplementary oxygen than without supplementary oxygen (Supine, 86.7 ± 4.3%; Lateral, 94.5 ± 0.8%; Supine + O2, 93.2 ± 4.5%; Lateral + O2, 98.2 ± 1.5%). In conclusion, the lateral position during sleep attenuated sympathetic nervous system activity and improved oxygenation in patients with concomitant CAD and SAS.
- Published
- 2007
- Full Text
- View/download PDF
16. Effects of Music Therapy on Heart Rate Variability in Elderly Patients with Cerebral Vascular Disease and Dementia
- Author
-
Akira Kurita, MD, Bonpei Takase, MD, Kaoru Okada, MD, Yuji Horiguchi, MD, Shinya Abe, MD, Yoshiki Kusama, MD, and Hirotsugu Atarasi, MD
- Subjects
Heart rate variability ,Music therapy ,Cerebral vascular disease ,Dementia ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Objective: In Japan, the number of elderly people with cerebral vascular disease (CVD) and dementia is increasing, resulting in increased expenditures to treat such patients. Reports indicate that music therapy can reduce anxiety in patients with myocardial infarction. However, it is unclear whether music therapy can have beneficial effects on very elderly patients with CVD and dementia, as these conditions may influence cardiac autonomic nerve functions. Therefore, we investigated the effects of music therapy on the autonomic nerve system in elderly patients with CVD and dementia, using an ambulatory Holter ECG system. Methods and Results: The subjects were 12 elderly patients aged ≥75 years, hospitalized for CVD and dementia. We measured their heart rate variability (HRV) indices of power domain and frequency domain analysis. The mean RR significantly increased during music therapy, from 842 ± 174 to 1022 ± 284 (p < 0:05), and decreased to 820 ± 284 ms after music therapy. HF significantly increased during music therapy, from 59 ± 41 to 127 ± 97 ms2 (p < 0:01), and decreased to 77 ± 60 ms2 after music therapy. LF/HF decreased from 2:2 ± 1:3 to 1:7 ± 1:3 during music therapy (p < 0:10), and increased to 2:0 ± 1:1 after music therapy. Time domain (HRV) indices increased during music therapy and decreased after music therapy: RMSSD increased from 19:4 ± 11 to 39:8 ± 17 ms, and then decreased to 19:4 ± 8:3 ms; pNN50 increased from 3:6 ± 3:2 to 16:1 ± 13:3%(p < 0:01), and then decreased to 4:3 ± 4:2%. Conclusions: Music therapy enhanced parasympathetic activity and decreased sympathetic activity in elderly patients with CVD and dementia. These findings suggest that music therapy is useful for alleviating anxiety, increasing comfort and facilitating relaxation for elderly patients with CVD and dementia.
- Published
- 2006
- Full Text
- View/download PDF
17. Detecting Restenosis after Percutaneous Coronary Intervention Using Exercise-Stress Electrocardiogram Findings Including QT Dispersion
- Author
-
Bonpei Takase, MD, Yoshiki Kusama, MD, Mitsuhiro Nishizaki, MD, Yasushi Koide, MD, Syoudai Li, MD, Kiyoshi Kawakubo, MD, Satoshi Saito, MD, Teruhisa Tanabe, MD, Kazuhisa Kodama, MD, and Hiroshi Kishida, MD
- Subjects
Coronary artery disease ,Electrocardiogram ,Revascularization ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Despite the advent of drug-eluting stents in Japan, bare metal stents or conventional balloon angioplasty are still indicated in some patients needing elective percutaneous coronary intervention (PCI) and in patients with acute coronary syndrome if these patients develop side effects while taking ticlopidine. In such patients, restenosis is a problem that is difficult to diagnose. To investigate the comparative diagnostic accuracy of the exercise-stress electrocardiogram (ECG) for detecting restenosis after PCI, we measured conventional ST-segment changes and QT dispersion during exercise-stress testing in 173 patients with elective PCI (63 ± 10 years old). Exercise-stress testing was performed 3 to 6 months after successful PCI, and restenosis was confirmed by follow-up coronary angiogram. There were 98 patients with a prior myocardial infarction (prior MI group and 76 patients with no prior myocardial infarction (no MI group). Restenosis was found in 45 patients (46% in the prior MI group and 26 patients (34%) in the no MI group. Conventional ST-segment depression (>1:0 mm, J 60 ms indicating exercise-induced myocardial ischemia had a sensitivity of around 50% and a specificity of around 70% for diagnosing restenosis in both groups. In the prior MI group, QT dispersion was increased by exercise-stress testing in both patients with and without restenosis, whereas in the no MI group, QT dispersion increased only in patients with restenosis. With a cut-off value of >60 ms, QT dispersion had a sensitivity of 54% and a specificity of 68% for detecting restenosis in the no MI group; these values were comparable to those seen with conventional ST-segment changes. In conclusion, due to its low cost, exercise-stress ECG remains useful for diagnosing restenosis following PCI if the clinician understands its limited sensitivity and specificity. The presence of a prior MI must be considered when QT dispersion during exercise-stress testing is used for detecting restenosis.
- Published
- 2006
- Full Text
- View/download PDF
18. Unexpected Lethal Complication of Ventricular Fibrillation in Symptom Free Variant Angina Pectoris
- Author
-
Yashiro Nogami, MD, Bonpei Takase, MD, Ryuichi Kato, MD, Susumu Isoda, MD, Masafumi Shimizu, MD, Isamu Kawase, MD, Fumitaka Ohsuzu, MD, Masayuki Ishihara, PhD, and Tadaaki Maehara, MD
- Subjects
Sudden death ,Silent myocardial ischemia ,Ambulatory electrocardiographic monitoring ,Implantable cardioverter-defibrillators ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
We report an unexpected sudden cardiac death due to variant angina complicated by ventricular fibrillation occurring during routine ambulatory electrocardiographic monitoring. The patient had one previous episode of ventricular fibrillation before the lethal event. He had no significant coronary artery disease and was asymptomatic throughout his illness. In clinical practice, when an episode of ventricular fibrillation is noted, one should be aware of the risk of sudden cardiac death, even if the patient's vasospastic angina is relatively stable and asymptomatic.
- Published
- 2005
- Full Text
- View/download PDF
19. Angiogenesis following Cell Injection is Induced by an Excess Inflammatory Response Coordinated by Bone Marrow Cells
- Author
-
Hidemi Hattori Ph.D., Yoshiko Amano, Yoshiko Habu-Ogawa, Takahiro Ando, Bonpei Takase, and Masayuki Ishihara
- Subjects
Medicine - Abstract
The aim of this study was to identify novel angiogenic mechanisms underlying the regenerative process. To that end, interactions between adipose tissue-derived stromal cells (ASCs) and bone marrow cells (BMCs) were initially investigated using real-time fluorescence optical imaging. To monitor cell behavior in mice, we injected green fluorescent protein-positive (GFP + ) BMCs into the tail vein and injected PKH26-labeled ASCs behind the ears. Angiogenesis and inflammation were observed at these sites via an optical imaging probe. Injected GFP + BMCs migrated from the blood vessels into the tissues surrounding the ASC injection sites. Many of the migrating GFP + BMCs discovered at the ASC injection sites were inflammatory cells, including Gr-1 + , CD11b + , and F4/80 + cells. ASCs cocultured with inflammatory cells secreted increased levels of chemokines such as macrophage inflammatory protein (MIP)-1α, MIP-1β, keratinocyte-derived chemokines, and monocyte chemotactic protein 1. Similarly, these ASCs secreted increased levels of angiogenic growth factors such as hepatocyte growth factor and vascular endothelial growth factor. However, when anti-CXC chemokine receptor type 4 antibody was injected at regular intervals, the migration of GFP + BMCs (especially Gr-1 + and CD11b + cells) to ASC injection sites was inhibited, as was angiogenesis. The collective influence of the injected ASCs and BMC-derived inflammatory cells promoted acute inflammation and angiogenesis. Together, the results suggest that the outcome of cell-based angiogenic therapy is influenced not only by the injected cells but also by the effect of intrinsic inflammatory cells.
- Published
- 2013
- Full Text
- View/download PDF
20. Endothelial Function as a Possible Significant Determinant of Cardiac Function during Exercise in Patients with Structural Heart Disease
- Author
-
Bonpei Takase, Takashi Akima, Akimi Uehata, Masayuki Ishihara, and Akira Kurita
- Subjects
Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
This study was investigated the role that endothelial function and systemic vascular resistance (SVR) play in determining cardiac function reserve during exercise by a new ambulatory radionuclide monitoring system (VEST) in patients with heart disease. The study population consisted of 32 patients. The patients had cardiopulmonary stress testing using the treadmill Ramp protocol and the VEST. The anaerobic threshold (AT) was autodetermined using the V-slope method. The SVR was calculated by determining the mean blood pressure/cardiac output. Flow-mediated vasodilation (FMD) was measured in the brachial artery to evaluate endotheilial function. FMD and the percent change f'rom rest to AT in SVR correlated with those from rest to AT in ejection fraction and peak ejection ratio by VEST, respectively. Our findings suggest that FMD in the brachial artery and the SVR determined by VEST in patients with heart disease can possibly reflect cardiac function reserve during aerobic exercise.
- Published
- 2009
- Full Text
- View/download PDF
21. Liposome-Encapsulated Hemoglobin Vesicle Improves Persistent Anti-arrhythmogenesis through Improving Myocardial Electrical Remodeling and Modulating Cardiac Autonomic Activity in a Hemorrhagic Shock-Induced Rat Heart Model
- Author
-
Bonpei Takase, Yuko Higashimura, Haruka Asahina, Masayuki Ishihara, and Hiromi Sakai
- Subjects
Genetics ,Biochemistry - Published
- 2023
- Full Text
- View/download PDF
22. Association of serum nitric oxide metabolite level with mortality in patients undergoing coronary angiography
- Author
-
Takayuki Namba, Nobuyuki Masaki, Yasuhiro Hitomi, Yuki Ishinoda, Midori Iwashita, Yusuke Yumita, Kazuki Kagami, Risako Yasuda, Yukinori Ikegami, Takumi Toya, Yuji Nagatomo, Bonpei Takase, Kyoko Soejima, and Takeshi Adachi
- Subjects
Heart Failure ,Nitrates ,C-Reactive Protein ,Natriuretic Peptide, Brain ,Humans ,Middle Aged ,Nitric Oxide ,Coronary Angiography ,Cardiology and Cardiovascular Medicine ,Nitrites ,Biomarkers ,Aged - Abstract
Nitric oxide (NO) is a relevant molecule for vascular homeostasis. The level of serum NO metabolites (NOx), which consist of nitrite and nitrate, has been investigated as an alternative biomarker of NO production, but its clinical value has not yet been determined.143 patients (66 ± 12 years old) were followed up after coronary catheterization. During a median (inter-quartile range) observation period of 6.13 (3.32-9.21) years, there were 20 (14 %) all-cause deaths, including 11 (8 %) cardiovascular deaths, 17 (12 %) major adverse cardiovascular events, and 17 (12 %) hospital admissions for heart failure. Median NOx level was 34.5 μmol/L (23.9-54.3). NOx was a risk factor for all-cause death [hazard ratio (HR) by unit increase, 1.010, 95 % confidence interval (CI) 1.001-1.018; p = 0.021] and heart failure (HR 1.010, CI 1.001-1.019; p = 0.029). Even after adjustment for age, sex, coronary risk factors, C-reactive protein, log-transformed brain natriuretic peptide, estimated glomerular filtration rate, and nitrate treatment, NOx was a risk factor for all-cause death (HR 1.015, CI 1.004-1.027; p = 0.008) and admission with heart failure (HR 1.018, CI 1.005-1.018, p = 0.007).An increase in serum NOx level does not herald a benign clinical course but is an independent predictor of high risk of any-cause mortality and heart failure.
- Published
- 2022
- Full Text
- View/download PDF
23. Effect of ipragliflozin on carotid intima-media thickness in type 2 diabetes patients
- Author
-
Atsushi, Tanaka, Masataka, Sata, Yosuke, Okada, Hiroki, Teragawa, Kazuo, Eguchi, Michio, Shimabukuro, Isao, Taguchi, Kazuo, Matsunaga, Yumiko, Kanzaki, Hisako, Yoshida, Tomoko, Ishizu, Shinichiro, Ueda, Masafumi, Kitakaze, Toyoaki, Murohara, Koichi, Node, Yoshihiko, Nishio, Mitsuru, Ohishi, Kazuomi, Kario, Wataru, Shimizu, Hideaki, Jinnouchi, Hirofumi, Tomiyama, Koji, Maemura, Makoto, Suzuki, Shinichi, Ando, Haruo, Kamiya, Tomohiro, Sakamoto, Mamoru, Nanasato, Munehide, Matsuhisa, Junya, Ako, Yoshimasa, Aso, Masaharu, Ishihara, Kazuo, Kitagawa, Akira, Yamashina, Yumi, Ikehara, Ayako, Takamori, Miki, Mori, Kaori, Yamaguchi, Machiko, Asaka, Tetsuya, Kaneko, Masashi, Sakuma, Shigeru, Toyoda, Takahisa, Nasuno, Michiya, Kageyama, Jojima, Teruo, Iijima, Toshie, Haruka, Kishi, Hirotsugu, Yamada, Kenya, Kusunose, Daiju, Fukuda, Shusuke, Yagi, Koji, Yamaguchi, Takayuki, Ise, Yutaka, Kawabata, Akio, Kuroda, Yuichi, Akasaki, Mihoko, Kurano, Satoshi, Hoshide, Takahiro, Komori, Tomoyuki, Kabutoya, Yukiyo, Ogata, Yuji, Koide, Hiroaki, Kawano, Satoshi, Ikeda, Satoki, Fukae, Seiji, Koga, Yukihito, Higashi, Shinji, Kishimoto, Masato, Kajikawa, Tatsuya, Maruhashi, Yoshiaki, Kubota, Yoshisato, Shibata, Nehiro, Kuriyama, Ikuko, Nakamura, Kanemitsu, Hironori, Bonpei, Takase, Yuichi, Orita, Chikage, Oshita, Yuko, Uchimura, Ruka, Yoshida, Yukihiko, Yoshida, Hirohiko, Suzuki, Yasuhiro, Ogura, Mayuho, Maeda, Masaki, Takenaka, Takumi, Hayashi, Mirai, Hirose, Itaru, Hisauchi, Toshiaki, Kadokami, Ryo, Nakamura, Junji, Kanda, Masaaki, Hoshiga, Koichi, Sohmiya, Arihiro, Koyosue, Hiroki, Uehara, Naoto, Miyagi, Toshiya, Chinen, Kentaro, Nakamura, Chikashi, Nago, Suguru, Chiba, Sho, Hatano, Yoshikatsu, Gima, Masami, Abe, Masayoshi, Ajioka, Hiroshi, Asano, Yoshihiro, Nakashima, Hiroyuki, Osanai, Takahiro, Kanbara, Yusuke, Sakamoto, Mitsutoshi, Oguri, Shiou, Ohguchi, Kunihiko, Takahara, Kazuhiro, Izumi, Kenichiro, Yasuda, Akihiro, Kudo, Noritaka, Machii, Ryota, Morimoto, Yasuko, Bando, Takahiro, Okumura, Toru, Kondo, Shin-Ichiro, Miura, Yuhei, Shiga, Joji, Mirii, Makoto, Sugihara, Tadaaki, Arimura, Junko, Nakano, Kazuhisa, Kodama, Nobuyuki, Ohte, Tomonori, Sugiura, Kazuaki, Wakami, Yasuhiko, Takemoto, Minoru, Yoshiyama, Taichi, Shuto, Kazuo, Fukumoto, Kenichi, Tanaka, Satomi, Sonoda, Akemi, Tokutsu, Takashi, Otsuka, Fumi, Uemura, Kenji, Koikawa, Megumi, Miyazaki, Maiko, Umikawa, Manabu, Narisawa, Machi, Furuta, Hiroshi, Minami, Masaru, Doi, Kazuhiro, Sugimoto, Susumu, Suzuki, Akira, Kurozumi, and Kosuke, Nishio
- Subjects
Ipragliflozin ,Type 2 diabetes ,Pharmacology (medical) ,Carotid intima-media thickness ,Atherosclerosis ,Cardiology and Cardiovascular Medicine - Abstract
Aims To examine the effects of a 24-month treatment with ipragliflozin on carotid intima-media thickness (IMT) in type 2 diabetes patients. Methods and results In this multicenter, prospective, randomized, open-label, and blinded-endpoint investigator-initiated clinical trial, adults with type 2 diabetes and haemoglobin A1C (HbA1c) of 6.0–10.0% (42–86 mmol/mol) were randomized equally to ipragliflozin (50 mg daily) and non-sodium-glucose cotransporter-2 (SGLT2) inhibitor use of standard-care (control group) for type 2 diabetes and were followed-up to 24 months. The primary endpoint was the change in mean common carotid artery IMT (CCA-IMT) from baseline to 24 months. A total of 482 patients were equally allocated to the ipragliflozin (N = 241) and control (N = 241) groups, and 464 patients (median age 68 years, female 31.7%, median type 2 diabetes duration 8 years, median HbA1c 7.3%) were included in the analyses. For the primary endpoint, the changes in the mean CCA-IMT from baseline to 24 months were 0.0013 [95% confidence interval (CI), −0.0155–0.0182] mm and 0.0015 (95% CI, −0.0155–0.0184) mm in the ipragliflozin and control groups, respectively, with an estimated group difference (ipragliflozin-control) of −0.0001 mm (95% CI, −0.0191–0.0189; P = 0.989). A group difference in HbA1c change at 24 months was also non-significant between the treatment groups [−0.1% (95% CI, −0.2–0.1); P = 0.359]. Conclusion Twenty-four months of ipragliflozin treatment did not affect carotid IMT status in patients with type 2 diabetes recruited in the PROTECT study, relative to the non-SGLT2 inhibitor-use standard care for type 2 diabetes.
- Published
- 2022
- Full Text
- View/download PDF
24. Effect of Novel Stratified Lipid Risk by 'LDL-Window' and Flow-Mediated Dilation on the Prognosis of Coronary Artery Disease Using the FMD-J Study A Data
- Author
-
Shichiro, Abe, Yasuo, Haruyama, Gen, Kobashi, Shigeru, Toyoda, Teruo, Inoue, Hirofumi, Tomiyama, Tomoko, Ishizu, Takahide, Kohro, Yukihito, Higashi, Bonpei, Takase, Toru, Suzuki, Shinichiro, Ueda, Tsutomu, Yamazaki, Tomoo, Furumoto, Kazuomi, Kario, Shinji, Koba, Yasuhiko, Takemoto, Takuzo, Hano, Masataka, Sata, Yutaka, Ishibashi, Koichi, Node, Koji, Maemura, Yusuke, Ohya, Taiji, Furukawa, Hiroshi, Ito, and Akira, Yamashina
- Subjects
Lipoproteins ,Cholesterol, HDL ,Cholesterol, LDL ,General Medicine ,Prognosis ,Dilatation ,Coronary artery disease ,Triglyceride ,Flow-mediated dilation ,Non-high-density lipoprotein cholesterol ,Cholesterol ,Risk Factors ,Humans ,Cardiology and Cardiovascular Medicine ,Lipid risk stratification ,Triglycerides - Abstract
Background: Elevated levels of triglyceride (TG) and non-high-density lipoprotein cholesterol (non-HDL-C) are regarded as a residual lipid risk in low-density lipoprotein cholesterol (LDL-C)-lowering therapy. This study investigated the association between lipid risk stratified by TG and non-HDL-C and the prognosis of patients with coronary artery disease (CAD), and the association between stratified lipid risk and flow-mediated dilatation (FMD) index. Methods and Results: The 624 CAD patients enrolled in flow-mediated dilation (FMD)-J study A were divided into 4 groups: low-risk group (n=413) with TG
- Published
- 2022
25. Delayed Vasovagal Reaction with Reflex Syncope Following COVID-19 Vaccination
- Author
-
Bonpei, Takase, Katsumi, Hayashi, Satoko, Takei, Tetsuya, Hisada, Nobuyuki, Masaki, and Masayoshi, Nagata
- Subjects
COVID-19 Vaccines ,Vaccination ,Syncope, Vasovagal ,Internal Medicine ,COVID-19 ,Humans ,General Medicine ,Syncope - Abstract
Coronavirus disease 2019 (COVID-19) has become a pandemic, and vaccines remain the only effective tools available for ending it. However, their side effects, such as syncope, which mimics sudden cardiac death, are serious concerns. We herein report 6 cases of delayed vasovagal syncope and presyncope (VVR) caused by COVID-19 vaccination among 25,530 COVID-19 patients. The prevalence of delayed VVR due to COVID-19 vaccination was 0.026%. In addition, no delayed VVR was found among 17,386 patients who received the influenza vaccine. Delayed VVR is likely to be overlooked if medical staff are not aware of this symptom. This report provides significant information regarding effects of COVID-19 vaccination.
- Published
- 2022
- Full Text
- View/download PDF
26. Intraosseous infusion of liposome‐encapsulated hemoglobin (HbV) acutely prevents hemorrhagic anemia‐induced lethal arrhythmias, and its efficacy persists with preventing proarrhythmic side effects in the subacute phase of severe hemodilution model
- Author
-
Bonpei Takase, Yuko Higashimura, Haruka Asahina, Nobuyuki Masaki, Manabu Kinoshita, and Hiromi Sakai
- Subjects
Hemodilution ,Biomedical Engineering ,Medicine (miscellaneous) ,Anemia ,Arrhythmias, Cardiac ,Stroke Volume ,Bioengineering ,General Medicine ,Infusions, Intraosseous ,Ventricular Function, Left ,Rats ,Rats, Sprague-Dawley ,Biomaterials ,Hemoglobins ,Albumins ,Tachycardia, Ventricular ,Animals - Abstract
Artificial oxygen carriers (HbV) can treat hemorrhagic shock with lethal arrhythmias (VT/VF). No reports exist on subacute HbV's effects.Acute and subacute resuscitation effects with anti-arrhythmogenesis of HbV were studied in 85% blood exchange rat model (85%-Model). Lethal 85%-Model was created by bone marrow transfusion and femoral artery bleeding in 80 SD rats in HbV-administered group (HbV-group), washed erythrocyte-administered group (wRBC-group), and 5% albumin-administered group (ALB-group). Survival rates, anti-arrhythmic efficacy by optical mapping system (OMP) with electrophysiological study (EPS) in Langendorff heart, cardiac autonomic activity by heart rate variability (HRV) and ventricular arrhythmias by 24-h electrocardiogram telemetry monitoring (24 h-ECG) in awake, and left ventricular function by echocardiography (left ventricular ejection fraction [LVEF]) were measured.All rats in HbV- and wRBC-groups survived for 4 weeks, whereas no rats in ALB-group. HbV and wRBC acutely suppressed VT/VF in Langendorff heart through ameliorating action potential duration dispersion (APDd) analyzed by OMP with EPS. For subacute analysis, 50% blood exchange by 5% albumin was used (ALB-group 50). Subacute salutary effect on APDd and VT/VF inducibility was confirmed in HbV- and wRBC-groups. 24 h-ECG showed that HbV and wRBC suppressed none-sustained ventricular tachycardia (NSVT) and sympathetic component of HRV (LF/HF) with preserved LVEF (HbV-group, wRBC-group vs. ALB-group 50; NSVT numbers/days, 0.5 ± 0.3, 0.4 ± 0.3 vs. 3.9 ± 1.2*; LF/HF, 1.1 ± 0.2, 0.8 ± 0.2 vs. 3.5 ± 1.0*; LVEF, 84 ± 5, 83 ± 4, vs. 77 ± 4%*; *p 0.05).Collectively, HbV has sustained antiarrhythmic effect in subacute 85%-Model by ameliorating electrical remodeling and improving arrhythmogenic modifying factors (HRV and LVEF). These findings are useful in now continuing clinical trials of HbV.
- Published
- 2022
- Full Text
- View/download PDF
27. A Low Arginine/Ornithine Ratio is Associated with Long-Term Cardiovascular Mortality
- Author
-
Yuki Ishinoda, Nobuyuki Masaki, Yasuhiro Hitomi, Akira Taruoka, Akane Kawai, Midori Iwashita, Yusuke Yumita, Kazuki Kagami, Risako Yasuda, Yasuo Ido, Takumi Toya, Yukinori Ikegami, Takayuki Namba, Yuji Nagatomo, Koji Miyazaki, Bonpei Takase, and Takeshi Adachi
- Subjects
Biochemistry (medical) ,Internal Medicine ,Cardiology and Cardiovascular Medicine - Published
- 2023
- Full Text
- View/download PDF
28. Picturing Vascular Health in Patients with Type 2 Diabetes Mellitus: Review based on the Special Lecture 2021
- Author
-
Bonpei Takase
- Published
- 2021
- Full Text
- View/download PDF
29. Development of Non-contact Monitoring System of Heart Rate Variability (HRV) - An Approach of Remote Sensing for Ubiquitous Technology -.
- Author
-
Satoshi Suzuki, Takemi Matsui, Shinji Gotoh, Yasutaka Mori, Bonpei Takase, and Masayuki Ishihara
- Published
- 2009
- Full Text
- View/download PDF
30. Effect of Luseogliflozin on liver function, BNP and baPWV in diabetics with coronary artery disease
- Author
-
Yuko Higashimura and Bonpei Takase
- Subjects
Coronary artery disease ,medicine.medical_specialty ,business.industry ,Heart failure ,Internal medicine ,Luseogliflozin ,medicine ,Cardiology ,Liver function ,medicine.disease ,Vascular function ,business - Published
- 2021
- Full Text
- View/download PDF
31. Vasospasm-induced ST-segment elevation myocardial infarction in a premenopausal woman with endothelial dysfunction
- Author
-
Bonpei Takase, Yukie Kobayashi, Natsuko Sasaki, Katsumi Hayashi, Tetsuya Hisada, Masami Sakurada, Nobuyuki Masaki, and Masayoshi Nagata
- Subjects
Infectious Diseases ,parasitic diseases ,cardiovascular system ,Parasitology ,cardiovascular diseases ,Microbiology - Abstract
ST-segment elevation myocardial infarction (STEMI) can be caused by coronary artery vasospasm (VSA) due to endothelial dysfunction. However, the clinical role of endothelial function tests in VSA-induced STEMI is not fully understood. We present the case of a 43-year-old woman with atypical chest pain and no coronary risk factors. STEMI caused by VSA was diagnosed. Flow-mediated vasodilatation (FMD) and EndPAT tests were performed; the FMD and reactive hyperaemia index were 3.8% and 1.23, respectively. Endothelial dysfunction is the putative cause of STEMI. FMD and EndPAT tests might be useful for predicting adverse outcomes in young premenopausal women with VSA.
- Published
- 2022
- Full Text
- View/download PDF
32. A non-contact vital sign monitoring system for ambulances using dual-frequency microwave radars.
- Author
-
Satoshi Suzuki, Takemi Matsui, Hiroshi Kawahara, Hiroto Ichiki, Jun Shimizu, Yoko Kondo, Shinji Gotoh, Hirofumi Yura, Bonpei Takase, and Masayuki Ishihara
- Published
- 2009
- Full Text
- View/download PDF
33. Usefulness of the SAGE score to predict elevated values of brachial-ankle pulse wave velocity in Japanese subjects with hypertension
- Author
-
Hiroki Nakano, Taiji Furukawa, Hiroshi Ito, Toshiharu Ninomiya, Toshiaki Ohkuma, Kazuki Shiina, Toru Suzuki, Masataka Sata, Shinji Koba, Koichi Node, Tomoko Ishizu, Taishiro Chikamori, Tsutomu Yamazaki, Panagiotis Xaplanteris, Takuzo Hano, Teruo Inoue, Koji Maemura, Akira Yamashina, Takahide Kohro, Yukihito Higashi, Shin ichiro Ueda, Yusuke Ohya, Charalambos Vlachopoulos, Hirofumi Tomiyama, Atsushi Tanaka, Tomoo Furumoto, Yasuhiko Takemoto, Yutaka Ishibashi, Bonpei Takase, and Kazuomi Kario
- Subjects
Adult ,Male ,medicine.medical_specialty ,Physiology ,Population ,Pulse Wave Analysis ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Internal medicine ,Internal Medicine ,medicine ,Health Status Indicators ,Humans ,cardiovascular diseases ,030212 general & internal medicine ,education ,Pulse wave velocity ,Aged ,education.field_of_study ,Receiver operating characteristic ,business.industry ,Area under the curve ,Odds ratio ,Middle Aged ,medicine.disease ,Cross-Sectional Studies ,Blood pressure ,Hypertension ,Cohort ,cardiovascular system ,Cardiology ,Arterial stiffness ,Female ,Cardiology and Cardiovascular Medicine ,business ,circulatory and respiratory physiology - Abstract
The score based on the office systolic blood pressure, age, fasting blood glucose level, and estimated glomerular filtration rate (SAGE score) has been proposed as a useful marker to identify elevated values of carotid-femoral pulse wave velocity (PWV). The present cross-sectional study was conducted to examine whether the SAGE score is also a useful marker to identify subjects with elevated brachial-ankle PWV values in Japanese subjects with hypertension. We measured the brachial-ankle PWV and calculated the SAGE score in a total of 1019 employees of a Japanese company with hypertension and 817 subjects with hypertension derived from a multicenter study cohort. The analyses in this study were based on data from these two study groups as well as on a composite population of the two (n = 1836). The receiver operating characteristic curve analysis showed that the area under the curve to identify subjects with brachial-ankle PWV values of ≥1800 cm/s was over 0.70 in each of the three study groups. Even after adjustments, a SAGE score ≥7 had a significant odds ratio for identifying subjects with brachial-ankle PWV values ≥1800 cm/s in the 1836 study subjects from the composite occupational and multicenter study cohort (odds ratio = 2.1, 95% confidence interval = 1.4–3.0, P
- Published
- 2020
- Full Text
- View/download PDF
34. Association between Total Cholesterol and the Direct to Total Bilirubin Ratio in Serum
- Author
-
Takeshi Adachi, Bonpei Takase, Tetsuya Hisada, Masataka Mine, and Nobuyuki Masaki
- Subjects
chemistry.chemical_compound ,medicine.medical_specialty ,Endocrinology ,chemistry ,Bilirubin ,Cholesterol ,business.industry ,Internal medicine ,Total cholesterol ,medicine ,Metabolism ,business - Published
- 2020
- Full Text
- View/download PDF
35. Increased arterial stiffness and cardiovascular risk prediction in controlled hypertensive patients with coronary artery disease: post hoc analysis of FMD-J (Flow-mediated Dilation Japan) Study A
- Author
-
Teruo Inoue, Yiming Han, Nozomu Oda, Kazuaki Chayama, Yumiko Iwamoto, Haruki Hashimoto, Kentaro Watanabe, Hiroshi Ito, Yusuke Ohya, Toru Suzuki, Takahiro Harada, Masataka Sata, Masato Kajikawa, Yoshiki Aibara, Yutaka Ishibashi, Bonpei Takase, Takuzo Hano, Shinsuke Mikami, Koji Maemura, Koichi Node, Shinji Kishimoto, Yuji Takaeko, Kazuomi Kario, Tomoko Ishizu, Takayuki Hidaka, Hisao Ikeda, Taiji Furukawa, Junko Soga, Hirofumi Tomiyama, Yasuhiko Takemoto, Chikara Goto, Yukihito Higashi, Ayumu Nakashima, Yasuki Kihara, Tomoo Furumoto, Tsutomu Yamazaki, Tatsuya Maruhashi, Takahide Kohro, Kensuke Noma, Takeshi Matsumoto, Akira Yamashina, Farina Mohamad Yusoff, Naomi Idei, Shogo Matsui, Shinichiro Ueda, Noritaka Fujimura, Akimichi Iwamoto, Takayuki Yamaji, and Shinji Koba
- Subjects
Male ,medicine.medical_specialty ,Physiology ,Blood Pressure ,Coronary Artery Disease ,Pulse Wave Analysis ,030204 cardiovascular system & hematology ,Risk Assessment ,Sudden death ,Coronary artery disease ,03 medical and health sciences ,Vascular Stiffness ,0302 clinical medicine ,Japan ,Internal medicine ,Internal Medicine ,medicine ,Humans ,Ankle Brachial Index ,030212 general & internal medicine ,Pulse wave velocity ,Stroke ,Aged ,business.industry ,Hazard ratio ,Middle Aged ,medicine.disease ,Vasodilation ,Blood pressure ,Cardiovascular Diseases ,Heart Disease Risk Factors ,Heart failure ,Hypertension ,Cardiology ,Arterial stiffness ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
The usefulness of brachial-ankle pulse wave velocity (baPWV), an index of arterial stiffness, is not fully known for the management of treated hypertensive patients with a history of coronary artery disease (CAD) who have blood pressure less than 130/80 mmHg, a recommended blood pressure target in the updated major hypertension guidelines. We analyzed data for 447 treated hypertensive patients with CAD enrolled in FMD-J Study A for assessment of the predictive value of baPWV for future cardiovascular events. The primary outcome was a composite of coronary events, stroke, heart failure, and sudden death. During a median follow-up period of 47.6 months, the primary outcome occurred in 64 patients. Blood pressure less than 130/80 mmHg was significantly associated with a lower risk of the composite outcome independent of other cardiovascular risk factors in treated hypertensive patients with CAD (hazard ratio, 0.59; 95% confidence interval (CI), 0.35-0.99; P = 0.04). In treated hypertensive patients with CAD who had blood pressure less than 130/80 mmHg, baPWV above the cutoff value of 1731 cm/s, derived from receiver-operator characteristic curve analysis for the composite outcome was significantly associated with a higher risk of the composite outcome independent of conventional risk factors (hazard ratio, 2.83; 95% CI, 1.02-7.91; P = 0.04). baPWV was an independent predictor of cardiovascular events in treated hypertensive patients with CAD who had blood pressure less than 130/80 mmHg, for whom measurement of baPWV is recommended for cardiovascular risk assessment.
- Published
- 2020
- Full Text
- View/download PDF
36. Effectiveness of the d-ROMs oxidative stress test to predict long-term cardiovascular mortality
- Author
-
Yasuhiro Hitomi, Nobuyuki Masaki, Yuki Ishinoda, Yasuo Ido, Midori Iwashita, Yusuke Yumita, Kazuki Kagami, Risako Yasuda, Yukinori Ikegami, Takumi Toya, Takayuki Namba, Yuji Nagatomo, Bonpei Takase, and Takeshi Adachi
- Subjects
Male ,Oxidative Stress ,C-Reactive Protein ,Cardiovascular Diseases ,Risk Factors ,Humans ,Female ,Coronary Artery Disease ,Middle Aged ,Cardiology and Cardiovascular Medicine ,Prognosis ,Reactive Oxygen Species ,Aged - Abstract
The long-term prognostic value of the derivatives of reactive oxidative metabolites (d-ROMs) oxidative stress test, which measures hydroperoxide in blood, has not been fully investigated.We administered the d-ROMs test to 265 patients with cardiovascular disease (204 men, 61 women; age, 65 ± 13 years) and followed these patients for up to 10 years. During the observational period of 5.82 (2.47-8.34) years, 31 (12%) patients died, including 20 (8%) of cardiovascular death, and 33 (12%) had major adverse cardiovascular events (MACEs). Cox regression analysis revealed that patients with a d-ROMs value ≥395 U.CARR had a greater risk for all-cause mortality [unadjusted hazard ratio (95% confidence interval), 3.586 (1.772-7.257)], cardiovascular death [7.034 (2.805-17.640)], and MACEs [4.440 (2.237-8.814)] (p 0.001 for all). In a model adjusted for age, sex, estimated glomerular filtration rate, C-reactive protein, diabetes, hypertension, hyperlipidemia, coronary artery diseases, current smoking, and log-transformed brain natriuretic peptide, all-cause death [2.311 (1.059-5.135), p = 0.036], cardiovascular death [4.398 (1.599-12.099), p = 0.004], MACEs [2.696 (1.266-5.739), p = 0.010] were still significant in patients with high d-ROMS values.A high d-ROMs value is an independent predictor of the long-term risk of cardiovascular mortality. A d-ROMs value of 395 U.CARR was considered to be an appropriate threshold for distinguishing prognosis.
- Published
- 2022
37. Chest Pain with New Abnormal Electrocardiogram Development after Injection of COVID-19 Vaccine Manufactured by Moderna
- Author
-
Bonpei Takase, Katsumi Hayashi, Tetsuya Hisada, Tyouji Tsuchiya, Nobuyuki Masaki, and Masayoshi Nagata
- Subjects
Internal Medicine ,General Medicine - Published
- 2022
- Full Text
- View/download PDF
38. Non-contact respiratory monitoring system using a ceiling-attached microwave antenna.
- Author
-
Maki Uenoyama, Takemi Matsui, Kouske Yamada, Satoshi Suzuki, Bonpei Takase, Shinya Suzuki, Masayuki Ishihara, and Mitsuyuki Kawakami
- Published
- 2006
- Full Text
- View/download PDF
39. Differential effect of a xanthine oxidase inhibitor on arterial stiffness and carotid atherosclerosis: a subanalysis of the PRIZE study
- Author
-
Kazuki, Shiina, Hirofumi, Tomiyama, Atsushi, Tanaka, Hisako, Yoshida, Kazuo, Eguchi, Kazuomi, Kario, Toru, Kato, Hiroki, Teragawa, Shigeru, Toyoda, Mitsuru, Ohishi, Yoshihiro, Fukumoto, Bonpei, Takase, Tomoko, Ishizu, and Koichi, Node
- Subjects
Carotid Artery Diseases ,Xanthine Oxidase ,Febuxostat ,Vascular Stiffness ,Awards and Prizes ,Humans ,Ankle Brachial Index ,Hyperuricemia ,Prospective Studies ,Enzyme Inhibitors ,Pulse Wave Analysis ,Atherosclerosis ,Uric Acid - Abstract
Atherosclerosis and arterial stiffness are phenotypes of atherosclerotic vascular damage. Atherosclerosis originates from endothelial vascular damage and forms focal morphological lesions; arterial stiffness originates from diffuse medial-layer damage in the arterial tree. Thus, the two phenomena reflect different facets of atherosclerotic vascular damage, and they both gradually progress. We conducted a subanalysis to compare the long-term effects of febuxostat on atherosclerosis and arterial stiffness in the PRIZE study (a multicenter, prospective, randomized, open-label, blinded-endpoint clinical trial to examine the effect of febuxostat on carotid atherosclerosis). Among 514 study participants, arterial stiffness parameters (brachial-ankle pulse wave velocity or cardio-ankle vascular index) were obtained at baseline, 12 months, and 24 months in 100 subjects. Among them, 48 subjects were allocated to the control group (i.e., nonpharmacological lifestyle modification for hyperuricemia), and 52 subjects were allocated to the febuxostat treatment group. While the decrease in serum uric acid was greater in the febuxostat group than in the control group, the adjusted percentage decrease in arterial stiffness parameters at month 24 was greater in the febuxostat group than in the control group, with a mean between-group difference (febuxostat - control) of -5.099% (95% confidence interval (CI) -10.009% to -0.188%, p = 0.042). Thus, long-term treatment with febuxostat may exert beneficial effects on arterial stiffness without improving carotid atherosclerosis. A long-term study to examine the effect of febuxostat on cardiovascular outcomes related to increased arterial stiffness is warranted.
- Published
- 2021
40. A novel method to prevent secondary exposure of medical and rescue personnel to toxic materials under biochemical hazard conditions using microwave radar and infrared thermography.
- Author
-
Takemi Matsui, Kousuke Hagisawa, Toshiaki Ishizuka, Bonpei Takase, Masayuki Ishihara, and Makoto Kikuchi
- Published
- 2004
- Full Text
- View/download PDF
41. Artificially Created Reentry Circuit by Laser Irradiation Causes Atrial Tachycardia to Persist in Murine Atria
- Author
-
Nobuyuki Masaki, Yuji Nagatomo, Kei Ito, Yasuo Ido, Shunpei Horii, Bonpei Takase, Hirotaka Yada, Takayuki Namba, Kazuhiro Tsujita, Atsushi Sato, Risako Yasuda, Kazuki Kagami, Ayumu Osaki, Toyokazu Kimura, Takumi Toya, Koji Miyazaki, Miya Ishihara, and Takeshi Adachi
- Subjects
medicine.medical_specialty ,law.invention ,Mice ,law ,Optical mapping ,Internal medicine ,Atrial Fibrillation ,medicine ,Tachycardia, Supraventricular ,Animals ,Humans ,Irradiation ,Heart Atria ,Atrial tachycardia ,business.industry ,Wild type ,Cardiac Pacing, Artificial ,Atrial fibrillation ,General Medicine ,Reentry ,Laser ,medicine.disease ,Disease Models, Animal ,medicine.anatomical_structure ,Ventricle ,cardiovascular system ,Cardiology ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background There is a gradual progression from paroxysmal to persistent atrial fibrillation (AF) in humans. To elucidate the mechanism involved, the creation of an artificial atrial substrate to persist AF in mice was attempted.Methods and Results:This study used wild type (WT) mice, but it is difficult to induce AF in them. A novel antegrade perfusion method from the left ventricle (LV) to enlarge both atria for artificial atrial modification was proposed in this study. Short duration AF was induced by burst pacing under this method. Optical mapping analysis revealed non-sustained focal type and meandering spiral reentrants after short duration AF. A tiny artificial substrate (~1.2 mm in diameter) was added in by laser irradiation to create a critical atrial arrhythmogenic substrate. Burst pacing was performed in a non-laser group (n=8), a circular-shape laser group (n=8), and a wedge-shaped dent laser group (n=8). We defined AF and atrial tachycardia (AT) as atrial arrhythmia (AA). Long-lasting AA was defined as lasting for ≥30 min. Long-lasting AA was observed in 0/8, 0/8, and 6/8 (75%) mice in each group. Optical mapping analysis revealed that the mechanism was AT with a stationary rotor around the irradiated margin. Conclusions Regrettably, this study failed to reproduce persistent AF, but succeeded in creating an arrhythmic substrate that causes sustained AT in WT mice.
- Published
- 2021
42. Non-contact monitoring of heart rate variability using medical radar for the evaluation of dynamic changes in autonomic nervous activity during a head-up tilt test
- Author
-
Takemi Matsui, Ken Kiyono, Tetsuo Kirimoto, He Liu, Guanghao Sun, Bonpei Takase, Kenichi Hashimoto, and Yosuke Tanaka
- Subjects
Adult ,Male ,medicine.medical_specialty ,Correlation coefficient ,medicine.medical_treatment ,Posture ,0206 medical engineering ,Biomedical Engineering ,02 engineering and technology ,Autonomic Nervous System ,01 natural sciences ,law.invention ,Electrocardiography ,Young Adult ,Heart Rate ,law ,Intensive care ,Internal medicine ,medicine ,Humans ,Heart rate variability ,Radar ,Monitoring, Physiologic ,medicine.diagnostic_test ,business.industry ,010401 analytical chemistry ,General Medicine ,020601 biomedical engineering ,0104 chemical sciences ,Autonomic nervous system ,Autoregressive model ,Cardiology ,Cardiac monitoring ,business - Abstract
Electrocardiography (ECG) is a mandatory standard for monitoring electrical activity of the heart in many clinical settings such as intensive care and emergency units. However, in situations wherein the skin is damaged, such as acute burn injuries, it is impossible to efficiently attach electrodes to the skin. In this study, we developed a non-contact cardiac monitoring system using a 24-GHz medical radar for directly measuring the beat-to-beat heart mechanical activity at a distance from a subject. The heart rate variability (HRV) was analysed using an autoregressive model (AR) from the measured beat-to-beat intervals during a head-up tilt test. To investigate the feasibility of the proposed system, we compared medical radar and ECG recording by using Lin's correlation coefficient and Bland-Altman analysis, which showed a negligible mean difference from the substantial agreement of Lin's correlation coefficient of 0.9 between the radar and ECG. The non-contact radar clearly monitored dynamic changes in HRV indices induced by the head-up tilt test. This type of non-contact HRV-sensing technique as an alternative approach has significant potential for advancing personal healthcare in both clinical and out-of-hospital settings.
- Published
- 2019
- Full Text
- View/download PDF
43. Target of Triglycerides as Residual Risk for Cardiovascular Events in Patients With Coronary Artery Disease ― Post Hoc Analysis of the FMD-J Study A ―
- Author
-
Hisao Ikeda, Taiji Furukawa, Takuzo Hano, Yasuhiko Takemoto, Teruo Inoue, Masato Kajikawa, Yusuke Ohya, Kazuaki Chayama, Hirofumi Tomiyama, Masataka Sata, Shogo Matsui, Yutaka Ishibashi, Kazuomi Kario, Bonpei Takase, Akira Yamashina, Yukihito Higashi, Kensuke Noma, Kentaro Watanabe, Chikara Goto, Koji Maemura, Toru Suzuki, Shinichiro Ueda, Yuji Takaeko, Tatsuya Maruhashi, Tomoo Furumoto, Takahide Kohro, Shinji Kishimoto, Haruki Hashimoto, Tomoko Ishizu, Farina Mohamad Yusoff, Koichi Node, Shinji Koba, Hiroshi Ito, Tsutomu Yamazaki, Yasuki Kihara, and Ayumu Nakashima
- Subjects
Male ,medicine.medical_specialty ,Acute coronary syndrome ,Coronary Artery Disease ,030204 cardiovascular system & hematology ,Disease-Free Survival ,Cardiovascular events ,Coronary artery disease ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Predictive Value of Tests ,Risk Factors ,Internal medicine ,Post-hoc analysis ,medicine ,Humans ,030212 general & internal medicine ,Acute Coronary Syndrome ,Triglycerides ,Aged ,Triglyceride ,business.industry ,Surrogate endpoint ,Hypertriglyceridemia ,Confounding ,General Medicine ,Middle Aged ,Atherosclerosis ,medicine.disease ,Stroke ,Survival Rate ,Residual risk ,chemistry ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Biomarkers ,Follow-Up Studies - Abstract
Background: Circulating triglyceride (TG) levels are a current focus as a residual risk for cardiovascular (CV) events. We evaluated the relationship between circulating TG levels and future CV events in patients with coronary artery disease (CAD) who were treated with conventional therapy. Methods and Results: We analyzed data for 652 patients who were enrolled in the FMD-J Study A. We investigated the associations between serum TG levels and first major CV events (death from CV cause, nonfatal acute coronary syndrome (ACS), nonfatal stroke, and CAD) for a 3-year follow-up period. Patients were divided into 4 groups based on serum TG level: low-normal (
- Published
- 2019
- Full Text
- View/download PDF
44. Liposome-encapsulated hemoglobin (HbV) transfusion rescues rats undergoing progressive lethal 85% hemorrhage as a result of an anti-arrhythmogenic effect on the myocardium
- Author
-
Yuko Higashimura, Hiromi Sakai, Haruka Asahina, Bonpei Takase, and Masayuki Ishihara
- Subjects
Liposome-encapsulated hemoglobin ,Male ,medicine.medical_specialty ,Resuscitation ,Biomedical Engineering ,Medicine (miscellaneous) ,Bioengineering ,Hemorrhage ,Gastroenterology ,Blood substitute ,Biomaterials ,Rats, Sprague-Dawley ,Hemoglobins ,Norepinephrine ,Blood Substitutes ,Heart Rate ,Internal medicine ,Albumins ,Heart rate variability ,Medicine ,Animals ,Pathological ,Ejection fraction ,business.industry ,Myocardium ,Albumin ,virus diseases ,Arrhythmias, Cardiac ,General Medicine ,medicine.anatomical_structure ,Ventricle ,cardiovascular system ,business ,Erythrocyte Transfusion - Abstract
Liposome-encapsulated hemoglobin vesicles (HbV) can serve as a blood substitute with oxygen-carrying capacity comparable to that of human blood and lethal hemorrhage is associated with lethal arrhythmias. To investigate the resuscitation effect of HbV on lethal hemorrhage and anti-arrhythmogenesis, we performed optical mapping analysis (OMP) and electrophysiological study (EPS) in graded blood exchange (85% blood loss) in the rat model. We also measured cardiac autonomic activity, as assessed by heart rate variability (HRV), and changes in plasma norepinephrine and left ventricle ejection fraction (LVEF) by echocardiography. Pathological study on Connexin43 was performed. A 5% albumin (ALB group), washed rat erythrocytes (wRBC group), and HbV (HbV group) were used as a resuscitation fluid. The survival effects over 24 hours were examined. All rats died in the ALB group, whereas almost all survived for 24-hours period in wRBC and HbV groups. OMP showed impaired action potential duration dispersion (APDd) in the ALB group, whereas normal APDs in HbV and wRBC groups. Lethal arrhythmias were induced by EPS in the ALB group, but not in wRBC and HbV groups. HRV indices, LVEF, Connexin43 were preserved in HbV and wRBC groups. Lethal hemorrhage causes lethal arrhythmias in the presence of impaired APDd. HbV acutely rescues lethal hemorrhage by preventing lethal arrhythmias and preserving arrhythmogenic factors.
- Published
- 2021
45. Effectiveness of pulsatility index of carotid Doppler ultrasonography to predict cardiovascular events
- Author
-
Yuki Ishinoda, Takeshi Adachi, Yasuhiro Hitomi, Kazuki Kagami, Takumi Toya, Risako Yasuda, Yuji Nagatomo, Takayuki Namba, Nobuyuki Masaki, and Bonpei Takase
- Subjects
medicine.medical_specialty ,Carotid Artery, Common ,medicine.medical_treatment ,Revascularization ,Internal medicine ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,cardiovascular diseases ,Risk factor ,Ultrasonography ,business.industry ,Proportional hazards model ,Incidence (epidemiology) ,Hazard ratio ,Carotid ultrasonography ,Ultrasonography, Doppler ,General Medicine ,Arteriosclerosis ,medicine.disease ,Cardiovascular Diseases ,Heart failure ,Carotid Artery, External ,cardiovascular system ,Cardiology ,business ,Carotid Artery, Internal - Abstract
PURPOSE The pulsatility index (PI) obtained from carotid ultrasonography is considered to be a marker of cerebrovascular resistance. However, the impact of PI on cardiovascular events has yet to be fully addressed. METHOD Fifty-four patients who underwent both carotid ultrasonography and coronary angiography were followed for 5.9 ± 3.2 years. The relationship between the incidence of cardiovascular events and PI was investigated. RESULT There were 10 (19%) deaths, four (7%) cardiovascular deaths, and nine (17%) major adverse cardiovascular events (MACEs). The cardiovascular events-defined as all hospitalization for MACEs plus heart failure, revascularization, and cardiovascular surgery-occurred in 21 patients (39%). The patients were divided into two groups according to each threshold of PI value for common carotid arteries (CCA), internal carotid arteries (ICA), and external carotid arteries (ECA), respectively. The thresholds were calculated based on receiver-operating characteristic curves for cardiovascular events. Log-rank test showed that the groups with CCA-PI ≥ 1.71, ICA-PI ≥ 1.20, and ECA-PI ≥ 2.46 had a higher incidence of cardiovascular events, respectively (p
- Published
- 2021
46. 739SERCA2 Cys674 modification lead to ventricular arrhythmia due to impaired sarcoplasmic reticulum Ca2+ handling
- Author
-
Takeshi Adachi, Kei Ito, Takumi Toya, Bonpei Takase, Ayumu Osaki, Yasuo Ido, Hirotaka Yada, Yusuke Yumita, and Kazuki Kagami
- Subjects
medicine.medical_specialty ,business.industry ,Calcium handling ,Physiology (medical) ,Endoplasmic reticulum ,Internal medicine ,cardiovascular system ,Cardiology ,Medicine ,Cardiology and Cardiovascular Medicine ,business ,Lead (electronics) ,human activities - Abstract
Background Sarcoplasmic reticulum Ca2+-ATPase2 (SERCA2) plays an important role in intracellular Ca2+ handling. Under pathological conditions, oxidative stress leads to irreversible oxidation of Cys674 on SERCA2 which causes intracellular Ca2+ overload. Intracellular Ca2+ overload is known as the cause of ventricular arrhythmia, but the relation between SERCA2 function and ventricular arrhythmia remains unclear. Purpose To investigate the role of Cys674 on SERCA2 in the intracellular Ca2+ handling and the induction of ventricular arrhythmia. Methods We employed SERCA2 Cys674Ser heterozygote knock-in mice (SKI) which mimics oxidative modification of Cys674 on SERCA2. Continuous infusion of angiotensin (ANG) (3mg/kg/day) or distilled water were performed both in wild type mice (WT) and SKI for a week. After 1 week, electrophysiological study and intracellular Ca2+ transient measurement were performed. Results ANG elevated blood pressure and represented cardiac hypertrophy with fibrosis similarly both in WT and SKI. The mRNA expression of calcium/calmodulin-dependent protein kinase-II (CaMKII), ryanodine receptor (RyR) and sodium-calcium exchanger (NCX) was increased in SKI heart compared with WT. QTc interval was prolonged in SKI compared with WT, which was markedly prolonged with ANG infusion. Under programmed electrical stimulation, only SKI with ANG showed high incidence of pacing induced ventricular arrhythmia (0/11 in WT/SKI control, 0/14 in WT with ANG vs. 8/14 in SKI with ANG, P Conclusions The loss of thiol on Cys674 under pathological condition resulted in impaired Ca2+ handling and high incidence of ventricular arrhythmia which were ameliorated by inhibition of Ca2+ leakage through RyR. Oxidative modification of Cys674 on SERCA2 might contribute to Ca2+ mishandling and arrhythmogenesis. Abstract Figure.
- Published
- 2020
- Full Text
- View/download PDF
47. Diagnostic Criteria of Flow‐Mediated Vasodilation for Normal Endothelial Function and Nitroglycerin‐Induced Vasodilation for Normal Vascular Smooth Muscle Function of the Brachial Artery
- Author
-
Yiming Han, Yusuke Ohya, Hirofumi Tomiyama, Hisao Ikeda, Taiji Furukawa, Yasuki Kihara, Masataka Sata, Masato Kajikawa, Chikara Goto, Shinichiro Ueda, Shinji Koba, Yukihito Higashi, Yoshiki Aibara, Koichi Node, Yutaka Ishibashi, Bonpei Takase, Tsutomu Yamazaki, Koji Maemura, Shinji Kishimoto, Tomoo Furumoto, Yuji Takaeko, Kentaro Watanabe, Toru Suzuki, Hiroshi Ito, Kazuaki Chayama, Ayumu Nakashima, Haruki Hashimoto, Akira Yamashina, Farina Mohamad Yusoff, Tomoko Ishizu, Takuzo Hano, Takayuki Hidaka, Kazuomi Kario, Tatsuya Maruhashi, Takahide Kohro, Teruo Inoue, Yasuhiko Takemoto, Takayuki Yamaji, and Takahiro Harada
- Subjects
Male ,Vascular smooth muscle ,Brachial Artery ,Vasodilator Agents ,Vasodilation ,Vascular Medicine ,Muscle, Smooth, Vascular ,Nitroglycerin ,endothelial function ,Japan ,Risk Factors ,Reference Values ,Cutoff ,Prospective Studies ,Registries ,Brachial artery ,vascular smooth muscle function ,Original Research ,Ultrasonography ,Aged, 80 and over ,Middle Aged ,University hospital ,flow‐mediated vasodilation ,Cardiovascular Diseases ,cardiovascular system ,nitroglycerin‐induced vasodilation ,Endothelium/Vascular Type/Nitric Oxide ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,Flow-Mediated Vasodilation ,Adult ,medicine.medical_specialty ,Adolescent ,Cardiovascular risk factors ,Hyperemia ,diagnostic criteria ,flow-mediated vasodilation ,nitroglycerin-induced vasodilation ,Young Adult ,Predictive Value of Tests ,medicine.artery ,Internal medicine ,medicine ,Humans ,Aged ,business.industry ,Curve analysis ,Atherosclerosis ,Heart Disease Risk Factors ,Endothelium, Vascular ,business - Abstract
Background Diagnostic criteria of flow‐mediated vasodilation (FMD), an index of endothelial function, and nitroglycerin‐induced vasodilation (NID), an index of vascular smooth muscle function, of the brachial artery have not been established. The purpose of this study was to propose diagnostic criteria of FMD and NID for normal endothelial function and normal vascular smooth muscle function. Methods and Results We investigated the cutoff values of FMD and NID in subjects with (risk group) and those without cardiovascular risk factors or cardiovascular diseases (no‐risk group) in 7277 Japanese subjects (mean age 51.4±10.8 years) from the Flow‐Mediated Dilation Japan study and the Flow‐Mediated Dilatation Japan Registry study for analysis of the cutoff value of FMD and in 1764 Japanese subjects (62.2±16.1 years) from the registry of Hiroshima University Hospital for analysis of the cutoff value of NID. Receiver‐operator characteristic curve analysis of FMD to discriminate subjects in the no‐risk group from patients in the risk group showed that the optimal cutoff value of FMD to diagnose subjects in the no‐risk group was 7.1%. Receiver‐operator characteristic curve analysis of NID to discriminate subjects in the no‐risk group from patients in the risk group showed that the optimal cutoff value of NID to diagnose subjects in the no‐risk group was 15.6%. Conclusions We propose that the cutoff value for normal endothelial function assessed by FMD of the brachial artery is 7.1% and that the cutoff value for normal vascular smooth muscle function assessed by NID of the brachial artery is 15.6% in Japanese subjects. Clinical Trial Registration www.umin.ac.jp Unique identifiers: UMIN000012950, UMIN000012951, UMIN000012952, and UMIN000003409
- Published
- 2020
- Full Text
- View/download PDF
48. Cross-sectional and longitudinal associations between serum uric acid and endothelial function in subjects with treated hypertension
- Author
-
Koji Maemura, Masataka Sata, Atsushi Tanaka, Tsutomu Yamazaki, Hiroshi Ito, Tomoo Furumoto, Kazuomi Kario, Atsushi Kawaguchi, Hirofumi Tomiyama, Toru Suzuki, Yutaka Ishibashi, Bonpei Takase, Takuzo Hano, Yukihito Higashi, Shinji Koba, Shinichiro Ueda, Koichi Node, Taiji Furukawa, Teruo Inoue, Akira Yamashina, Yusuke Ohya, Tomoko Ishizu, Chisa Matsumoto, and Yasuhiko Takemoto
- Subjects
Male ,medicine.medical_specialty ,Vasodilation ,Pulse Wave Analysis ,030204 cardiovascular system & hematology ,Carotid Intima-Media Thickness ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine.artery ,Internal medicine ,Humans ,Medicine ,Longitudinal Studies ,cardiovascular diseases ,030212 general & internal medicine ,Common carotid artery ,Pulse wave velocity ,Aged ,Flow mediated vasodilatation ,business.industry ,Serum uric acid ,Middle Aged ,Pathophysiology ,Uric Acid ,Cross-Sectional Studies ,Treatment Outcome ,chemistry ,Hypertension ,cardiovascular system ,Cardiology ,Uric acid ,Female ,Endothelium, Vascular ,Cardiology and Cardiovascular Medicine ,business ,Vascular function ,Biomarkers ,Follow-Up Studies - Abstract
Objectives The endothelial dysfunction-arterial stiffness-atherosclerosis continuum plays an important pathophysiological role in hypertension. The aim of this study was to investigate the cross-sectional association between serum uric acid (SUA) and vascular markers related to this continuum, and to assess the longitudinal association between SUA and endothelial function that represents the initial step of the continuum. Methods We evaluated the baseline associations between SUA levels and vascular markers that included flow-mediated vasodilatation (FMD), brachial-ankle pulse wave velocity (baPWV), and common carotid artery intima-media thickness (CCA-IMT) in 648 subjects receiving antihypertensive treatment. The longitudinal association between baseline SUA levels and FMD measured at 1.5 and 3 yr of follow-up was also investigated. Results At baseline, modest, but significant correlations were observed between SUA and FMD in females (r = −0.171), baPWV in males with SUA >368.78 μmol/L (r = −0.122) and in females with a SUA level ≤ 362.83 μmol/L (r = 0.217), mean CCA-IMT in females with a SUA level ≤ 333.09 μmol/L (r = 0.139), and max CCA-IMT in females with SUA level ≤ 333.09 μmol/L (r = 0.138). A longitudinal association between SUA and FMD was less observed in males. In females, the baseline SUA was associated significantly with FMD values at 1.5 yr (r = −0.211), and SUA levels >237.92 μmol/L were associated significantly and independently with FMD values at 3 yr (r = −0.166). Conclusions Lower SUA levels were associated with better vascular markers of the continuum, especially in females. Furthermore, we observed a longitudinal association between SUA and endothelial function, suggesting SUA level may be a potential marker of the continuum in hypertension.
- Published
- 2018
- Full Text
- View/download PDF
49. Effect of Canagliflozin on endothelial function in diabetic patients with suspected coronary artery disease: retrospective preliminary pilot study
- Author
-
Kenichi Hashimoto, Yuko Higashimura, and Bonpei Takase
- Subjects
Canagliflozin ,Coronary artery disease ,medicine.medical_specialty ,business.industry ,Internal medicine ,Diabetes mellitus ,medicine ,Cardiology ,medicine.disease ,business ,medicine.drug ,Flow mediated vasodilatation - Published
- 2018
- Full Text
- View/download PDF
50. Longitudinal association among endothelial function, arterial stiffness and subclinical organ damage in hypertension
- Author
-
Toru Suzuki, Yukihito Higashi, Shinichiro Ueda, Teruo Inoue, Taiji Furukawa, Akira Yamashina, Koji Maemura, Tsutomu Yamazaki, Yutaka Ishibashi, Hirofumi Tomiyama, Takuzo Hano, Bonpei Takase, Tomoo Furumoto, Chisa Matsumoto, Shinji Koba, Takahide Kohro, Yasuhiko Takemoto, Hiroshi Ito, Kazuomi Kario, Masataka Sata, Koichi Node, Tomoko Ishizu, and Yusuke Ohya
- Subjects
Male ,medicine.medical_specialty ,Renal function ,030204 cardiovascular system & hematology ,Pulse Wave Analysis ,Carotid Intima-Media Thickness ,03 medical and health sciences ,0302 clinical medicine ,Vascular Stiffness ,medicine.artery ,Internal medicine ,medicine ,Humans ,030212 general & internal medicine ,Longitudinal Studies ,Prospective Studies ,cardiovascular diseases ,Endothelial dysfunction ,Brachial artery ,Prospective cohort study ,Pulse wave velocity ,Subclinical infection ,Aged ,business.industry ,Endothelial function ,Middle Aged ,medicine.disease ,Atherosclerosis ,Arterial stiffness ,Hypertension ,Cardiology ,cardiovascular system ,Microalbuminuria ,Female ,Endothelium, Vascular ,Cardiology and Cardiovascular Medicine ,business ,Follow-Up Studies - Abstract
Objectives To examine the longitudinal mutual association between endothelial dysfunction and arterial stiffness, and also to determine which of the two variables was more closely associated with the progression of subclinical organ damage. Methods The brachial-ankle pulse wave velocity (baPWV), carotid intima-media thickness (CIMT), estimated glomerular filtration rate, microalbuminuria and flow-mediated vasodilatation of the brachial artery (FMD) were measured three times at 1.5-year intervals in 674 Japanese patients receiving antihypertensive treatment. Results The change of the baPWV during the study period was larger in the subjects with baseline FMD values in the lowest tertile as compared to those with baseline FMD values in the highest tertile. The change of the CIMT was smaller in the subjects with baseline baPWV values in the lowest tertile than in those with baseline baPWV values in the highest tertile. After the adjustment, the FMD value at the baseline was inversely associated with the baPWV at the end of the study period (beta=−0.07, p =0.01), although, the reverse association was not significant. The baPWV, but not the FMD value, at the baseline was associated with the CIMT (beta=0.06, p =0.04) measured at the end of the study period. Conclusions In hypertension, endothelial dysfunction was associated with the progression of arterial stiffness, although the reverse association was not confirmed. The increased arterial stiffness rather than endothelial dysfunction may be more closely associated with the progression of atherosclerotic vascular damage, and the endothelial dysfunction-arterial stiffness-atherosclerosis continuum may be important in hypertension.
- Published
- 2018
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.