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  • Ovid Technologies (Wolters Kluwer Health)  (46)
  • 1
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 146, No. 19 ( 2022-11-08), p. 1425-1433
    Abstract: Fulminant myocarditis presentation (FMP) is a rare and severe presentation of myocarditis. The natural history of FMP and its clinical features associated with poor outcomes are incompletely understood because there is a lack of generalizable evidence. Methods: This multicenter retrospective cohort study included patients hospitalized with histologically proven myocarditis who underwent catecholamine or mechanical support from 235 cardiovascular training hospitals across Japan between April 2012 and March 2017. Clinical features and the prognostic predictors of death or heart transplantation within 90 days on the basis of clinical and pathologic findings were determined using the Kaplan-Meier method, log-rank test, and Cox regression analysis. Results: This study included 344 patients with histologically proven FMP (median age, 54 years; 40% female). The median follow-up was 600 days (interquartile range, 36 to 1599 days) and the cumulative risk of death or heart transplantation at 90 days was 29% (n=98). Results from multivariable Cox regression analysis showed that older age, nonsinus rhythm, low left ventricular wall motion ( 〈 40%) on admission, and ventricular tachycardia or fibrillation on admission day were associated with worse 90-day survival. Severe histologic damage (damaged cardiomyocytes comprising ≥50% of the total cardiomyocytes) was associated with a worse 90-day prognosis in patients with lymphocytic myocarditis. Conclusions: The results from analyses of data from this multicenter registry demonstrated that patients with FMP are at a higher risk of death or heart transplantation in real-world settings. These observations inform which clinical and pathologic findings may be useful for prognostication in FMP. Registration: URL: https://www.umin.ac.jp/ctr ; Unique identifier: UMIN000039763.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
    detail.hit.zdb_id: 1466401-X
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  • 2
    In: Journal of the American Heart Association, Ovid Technologies (Wolters Kluwer Health), Vol. 6, No. 7 ( 2017-07)
    Abstract: There are limited data regarding the risk stratification based on peak aortic jet velocity (Vmax) in patients with severe aortic stenosis ( AS ). Methods and Results Among 3815 consecutive patients with severe AS enrolled in the CURRENT AS (Contemporary Outcomes After Surgery and Medical Treatment in Patients With Severe Aortic Stenosis) registry, the study population consisted of 1075 conservatively managed patients with Vmax ≥4.0 m/s and left ventricular ejection fraction ≥50%. The study patients were subdivided into 3 groups based on Vmax (group 1, 4.0 ≤ Vmax 〈 4.5 m/s, N=550; group 2, 4.5 ≤ Vmax 〈 5 m/s, N=279; and group 3, Vmax ≥5 m/s, N=246). Cumulative 5‐year incidence of AS ‐related events (aortic valve–related death or heart failure hospitalization) was incrementally higher with increasing Vmax (entire population; 38.0%, 49.4%, and 62.8%, P 〈 0.001; symptomatic patients; 55.7%, 60.9%, and 72.2%, P =0.008; and asymptomatic patients; 29.4%, 38.9%, and 47.7%, P =0.005). After adjusting for confounders, the excess risk of group 2 and group 3 relative to group 1 for AS ‐related events remained significant (hazard ratio, 1.39; 95% CI , 1.07–1.81; P =0.02, and hazard ratio, 1.53; 95% CI , 1.17–2.00; P =0.002, respectively). The effect size of group 3 relative to group 1 for AS ‐related events in asymptomatic patients (N=479) was similar to that in symptomatic patients (N=596; hazard ratio, 1.59; 95% CI , 1.01–2.52; P =0.047, and hazard ratio, 1.67; 95% CI , 1.16–2.40, P =0.008, respectively), and there was no significant overall interaction between the symptomatic status and the effect of the Vmax categories on AS ‐related events (interaction, P =0.88). Conclusions In conservatively managed severe AS patients with preserved left ventricular ejection fraction, increasing Vmax was associated with incrementally higher risk for AS ‐related events. However, the cumulative 5‐year incidence of the AS ‐related events remained very high even in asymptomatic patients with less greater Vmax.
    Type of Medium: Online Resource
    ISSN: 2047-9980
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 2653953-6
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  • 3
    In: Journal of the American Heart Association, Ovid Technologies (Wolters Kluwer Health), Vol. 8, No. 3 ( 2019-02-05)
    Abstract: See Editorial by Tribouilloy et al
    Type of Medium: Online Resource
    ISSN: 2047-9980
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
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  • 4
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 131, No. suppl_2 ( 2015-04-28)
    Abstract: Background: We have found that serum KD-specific molecules possess molecular structures common to microbe-associated molecular patterns (MAMPs) from several bacteria by liquid chromatography-mass spectrometry (LC-MS) analysis. In the present study, we have extensively searched for the culture conditions that reproducibly produce MAMPs common to serum KD specific molecules. Methods: Yersinia pseudotuberculosis, spore-forming bacteria and pathogenic bacteria were obtained from KD patients. Others were purchased from American Type Culture Collection. Microbes were cultured in a variety of conditions (medium, temperature, duration, shaking and biofilm formation). For biofilm formation, a various kind of oil/butter was added to the culture medium. Extraction from in vitro samples (culture supernatants, bacteria cells, and biofilms) as well as in vivo biofilm samples (teeth, tongue, nasal cavity, or rectum) was performed with ethyl acetate. Samples were analyzed by HPLC and MS (Esquire 6000 electrospray ionization). Human coronary artery endothelial cells (HCAECs) were employed for cytokine assay. The concentrations of cytokines were measured by EC800 cell analyzer with a BD™ Cytometric Bead Array. Results: Serum KD-specific molecules showed m/z and MS/MS fragmentation patterns almost identical to those of MAMPs obtained from the biofilms formed in vitro (Bacillus cereus, Bacillus subtilis, Yersinia pseudotuberculosis, Staphylococcus aureus) or in vivo. Not culture supernatants but biofilm extracts from these bacteria, especially cultured in the presence of butter, induced proinflammatory cytokines by HCAECs. Conclusions: Extensive analysis by LC-MS/MS revealed that serum KD-specific molecules common to MAMPs were mostly derived from biofilms in vitro and in vivo. This report offers novel insight into the pathogenesis of KD.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2015
    detail.hit.zdb_id: 1466401-X
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  • 5
    In: Journal of the American Heart Association, Ovid Technologies (Wolters Kluwer Health), Vol. 7, No. 11 ( 2018-06-05)
    Abstract: The annual incidence of sudden death has been reported to be low ( 〈 1%/year) in asymptomatic patients with severe aortic stenosis ( AS ), and there is a paucity of data on the risk factors of sudden death in patients with severe AS . Methods and Results We evaluated the incidence and risk factors of sudden death during the median follow‐up period of 1334 days in the Contemporary Outcomes After Surgery and Medical Treatment in Patients With Severe Aortic Stenosis (CURRENT AS) registry enrolling 3815 consecutive patients with severe AS between 2003 and 2011. The mean age was 78 years, and the prevalences of male sex and prior myocardial infarction were 38% and 8%, respectively. Sudden death occurred in 175 patients without aortic valve replacement. The cumulative 5‐year incidences of sudden death, censored at aortic valve replacement, which accounted for the competing risk, were 9.2% in symptomatic patients and 7.2% (1.4%/year) in asymptomatic patients ( P 〈 0.001). Among 82 asymptomatic patients experiencing sudden death, 54 patients (66%) died abruptly without any preceding symptoms, and 35 (65%) of these sudden deaths occurred within 3 months of the last clinical follow‐up visit. Independent risk factors for sudden death were hemodialysis (hazard ratio [ HR ] 3.63; 95% confidence interval [ CI ] 2.42‐5.43), prior myocardial infarction ( HR 2.11; 95% CI 1.28‐3.50), body mass index 〈 22 ( HR 1.51; 95% CI 1.03‐2.21), peak aortic jet velocity ≥5 m/s ( HR 1.76; 95% CI 1.12‐2.78), and left ventricular ejection fraction 〈 60% ( HR 1.52; 95% CI 1.08‐2.14). Conclusions The incidence of sudden death in asymptomatic patients with severe AS might be higher than that reported in previous reports. Several baseline clinical and echocardiographic characteristics were associated with increased risk of sudden death. Clinical Trial Registration URL : www.umin.ac.jp/ctr/index.htm . Unique identifier: UMIN 000012140.
    Type of Medium: Online Resource
    ISSN: 2047-9980
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
    detail.hit.zdb_id: 2653953-6
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  • 6
    In: Circulation: Cardiovascular Interventions, Ovid Technologies (Wolters Kluwer Health), Vol. 10, No. 5 ( 2017-05)
    Abstract: There is considerable debate on the management of patients with low-gradient severe aortic stenosis (LG-AS), defined as aortic valve area 〈 1 cm 2 with peak aortic jet velocity ≤4.0 m/s, and mean aortic pressure gradient ≤40 mm Hg. Methods and Results— In the CURRENT AS registry (Contemporary Outcomes After Surgery and Medical Treatment in Patients With Severe Aortic Stenosis), there were 2097 patients (initial aortic valve replacement [AVR] strategy: n=977, and conservative strategy: n=1120) with high-gradient severe aortic stenosis (HG-AS) and 1712 patients (initial AVR strategy: n=219, and conservative strategy: n=1493) with LG-AS. AVR was more frequently performed in HG-AS patients than in LG-AS patients (60% versus 28%) during the entire follow-up. In the comparison between the initial AVR and conservative groups, the propensity score–matched cohorts were developed in both HG-AS (n=887 for each group) and LG-AS (n=218 for each group) strata. The initial AVR strategy when compared with the conservative strategy was associated with markedly lower risk for a composite of aortic valve–related death or heart failure hospitalization in both HG-AS and LG-AS strata (hazard ratio, 0.30; 95% confidence interval, 0.25–0.37; P 〈 0.001 and hazard ratio, 0.46; 95% confidence interval, 0.32–0.67; P 〈 0.001, respectively). Among 1358 patients with LG-AS with preserved left ventricular ejection fraction, the initial AVR strategy was associated with a better outcome than the conservative strategy (adjusted hazard ratio, 0.37; 95% confidence interval, 0.23–0.59; P 〈 0.001). Conclusions— The initial AVR strategy was associated with better outcomes than the conservative strategy in both HG-AS and LG-AS patients, although AVR was less frequently performed in LG-AS patients than in HG-AS patients. The favorable effect of initial AVR strategy was also seen in patients with LG-AS with preserved left ventricular ejection fraction. Clinical Trial Registration— URL: http://www.umin.ac.jp/ctr/index.htm . Unique identifier: UMIN000012140.
    Type of Medium: Online Resource
    ISSN: 1941-7640 , 1941-7632
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 2450801-9
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  • 7
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2016
    In:  Plastic & Reconstructive Surgery Vol. 137, No. 5 ( 2016-05), p. 1476-1484
    In: Plastic & Reconstructive Surgery, Ovid Technologies (Wolters Kluwer Health), Vol. 137, No. 5 ( 2016-05), p. 1476-1484
    Abstract: The regeneration of large, poorly vascularized bone defects remains a significant challenge. Although vascularized bone grafts promote osteogenesis, the required tissue harvesting causes problematic donor-site morbidity. Artificial bone substitutes are promising alternatives for regenerative medicine applications, but the incorporation of suitable cells and/or growth factors is necessary for their successful clinical application. The inclusion of vascular bundles can further enhance the bone-forming capability of bone substitutes by promoting tissue neovascularization. Little is known about how neovascularization occurs and how new bone extends within vascularized tissue-engineered bone, because no previous studies have used tissue-engineered bone to treat large, poorly vascularized defects. Methods: In this study, the authors developed a novel vascularized tissue-engineered bone scaffold composed of osteogenic matrix cell sheets wrapped around vascular bundles within β-tricalcium phosphate ceramics. Results: Four weeks after subcutaneous transplantation in rats, making use of the femoral vascular bundle, vascularized tissue-engineered bone demonstrated more angiogenesis and higher osteogenic potential than the controls. After vascularized tissue-engineered bone implantation, abundant vascularization and new bone formation were observed radially from the vascular bundle, with increased mRNA expression of alkaline phosphatase, bone morphogenetic protein-2, osteocalcin, and vascular endothelial growth factor-A. Conclusion: This novel method for preparing vascularized tissue-engineered bone scaffolds may promote the regeneration of large bone defects, particularly where vascularization has been compromised.
    Type of Medium: Online Resource
    ISSN: 0032-1052
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
    detail.hit.zdb_id: 2037030-1
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  • 8
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2001
    In:  The Radiologist Vol. 8, No. 2 ( 2001-03), p. 61-71
    In: The Radiologist, Ovid Technologies (Wolters Kluwer Health), Vol. 8, No. 2 ( 2001-03), p. 61-71
    Type of Medium: Online Resource
    ISSN: 1069-1286
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2001
    detail.hit.zdb_id: 2084299-5
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  • 9
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 131, No. suppl_2 ( 2015-04-28)
    Abstract: Background: Kawasaki disease (KD) is a systemic vasculitis of unknown etiology. The innate immune system is involved in its pathophysiology at the acute phase. We have recently established a novel murine model of KD coronary arteritis by oral administration of a synthetic microbe-associated molecular pattern (MAMP). On the hypothesis that specific MAMPs exist in KD sera, we have searched them to identify KD-specific molecules and to assess the pathogenesis. Methods: The study subjects included 117 patients with KD (median age, 21 months; range 3-96 months; male/female, 65/52) and 101 controls with other febrile illnesses (DC: median age, 16 months; range 0-121 months; male/female, 61/40), and 5 normal controls (NC: median age, 6 months; range 3-39 months; male/female, 1/4). We performed liquid chromatography-mass spectrometry (LC-MS) analysis of fractionated serum and microbial samples by ethyl acetate. Results: KD serum samples elicited proinflammatory cytokine responses from human coronary artery endothelial cells (HCAECs). By LC-MS analysis of KD serum samples collected at 3 different periods, we detected a variety of KD-specific molecules in the lipophilic fractions that showed distinct m/z and MS/MS fragmentation patterns in each cluster. Serum KD-specific molecules showed m/z and MS/MS fragmentation patterns almost identical to those of MAMPs obtained from Bacillus cereus, Yersinia pseudotuberculosis and Staphylococcus aureus at the 1st study period, and from MAMPs from Bacillus cereus, Bacillus subtilis/Bacillus cereus/Yersinia pseudotuberculosis and Staphylococcus aureus at the 2nd and 3rd periods. These molecules decreased after intravenous immunoglobulin (IVIG) treatment. Conclusions: We herein conclude that serum KD-specific molecules possess molecular structures common to MAMPs from Bacillus cereus, Bacillus subtilis, Yersinia pseudotuberculosis and Staphylococcus aureus. Discovery of these KD-specific molecules offers novel insight into the diagnosis and management of KD as well as its pathogenesis.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2015
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  • 10
    In: Journal of the American Heart Association, Ovid Technologies (Wolters Kluwer Health), Vol. 10, No. 13 ( 2021-07-06)
    Abstract: This study aimed to determine the association between sedentary time and mortality with regard to leisure‐time physical activity with or without cardiometabolic diseases such as hypertension, dyslipidemia, and diabetes mellitus. Methods and Results Using data from the J‐MICC (Japan Multi‐Institutional Collaborative Cohort) Study, 64 456 participants (29 022 men, 35 434 women) were analyzed. Hazard ratios (HRs) and 95% CIs were used to characterize the relative risk of all‐cause mortality to evaluate its association with sedentary time (categorical variables: 〈 5, 5 to 〈 7, 7 to 〈 9, ≥9 h/d and 2‐hour increments in exposure) according to the self‐reported hypertension, dyslipidemia, and diabetes mellitus using a Cox proportional hazards model. A total of 2257 participants died during 7.7 years of follow‐up. The corresponding HRs for each 2‐hour increment in sedentary time among participants with all factors, no factors, hypertension, dyslipidemia, and diabetes mellitus were 1.153 (95% CI, 1.114–1.194), 1.125 (95% CI, 1.074–1.179), 1.202 (95% CI, 1.129–1.279), 1.176 (95% CI, 1.087–1.273), and 1.272 (95% CI, 1.159–1.396), respectively. Furthermore, when analyzed according to the combined different factors (hypertension, dyslipidemia, and diabetes mellitus), HRs increased with each additional factor, and participants reporting all 3 conditions had the highest HR of 1.417 (95% CI, 1.162–1.728) independently of leisure‐time metabolic equivalents. Conclusions The association between sedentary time and increased mortality is stronger among patients with hypertension, dyslipidemia, and diabetes mellitus regardless of leisure‐time physical activity in a large Japanese population.
    Type of Medium: Online Resource
    ISSN: 2047-9980
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2653953-6
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