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1.
Materials (Basel) ; 17(1)2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38204092

RESUMO

Batteries are essential in modern society as they can power a wide range of devices, from small household appliances to large-scale energy storage systems. Safety concerns with traditional lithium-ion batteries prompted the emergence of new battery technologies, among them solid-state batteries (SSBs), offering enhanced safety, energy density, and lifespan. This paper reviews current state-of-the-art SSB electrolyte and electrode materials, as well as global SSB market trends and key industry players. Solid-state electrolytes used in SSBs include inorganic solid electrolytes, organic solid polymer electrolytes, and solid composite electrolytes. Inorganic options like lithium aluminum titanium phosphate excel in ionic conductivity and thermal stability but exhibit mechanical fragility. Organic alternatives such as polyethylene oxide and polyvinylidene fluoride offer flexibility but possess lower ionic conductivity. Solid composite electrolytes combine the advantages of inorganic and organic materials, enhancing mechanical strength and ionic conductivity. While significant advances have been made for composite electrolytes, challenges remain for synthesis intricacies and material stability. Nuanced selection of these electrolytes is crucial for advancing resilient and high-performance SSBs. Furthermore, while global SSB production capacity is currently below 2 GWh, it is projected to grow with a >118% compound annual growth rate by 2035, when the potential SSB market size will likely exceed 42 billion euros.

2.
Front Hum Neurosci ; 17: 1237407, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38053650

RESUMO

Introduction: An important factor for optimal sensorimotor control is how well we are able to predict sensory feedback from internal and external sources during movement. If predictability decreases due to external disturbances, the brain is able to adjust muscle activation and the filtering of incoming sensory inputs. However, little is known about sensorimotor adjustments when predictability is increased by availability of additional internal feedback. In the present study we investigated how modifications of internal and external sensory feedback influence the control of muscle activation and gating of sensory input. Methods: Co-activation of forearm muscles, somatosensory evoked potentials (SEP) and short afferent inhibition (SAI) were assessed during three object manipulation tasks designed to differ in the predictability of sensory feedback. These included manipulation of a shared object with both hands (predictable coupling), manipulation of two independent objects without (uncoupled) and with external interference on one of the objects (unpredictable coupling). Results: We found a task-specific reduction in co-activation during the predictable coupling compared to the other tasks. Less sensory gating, reflected in larger subcortical SEP amplitudes, was observed in the unpredictable coupling task. SAI behavior was closely linked to the subcortical SEP component indicating an important function of subcortical sites in predictability related SEP gating and their direct influence on M1 inhibition. Discussion: Together, these findings suggest that the unpredictable coupling task cannot only rely on predictive forward control and is compensated by enhancing co-activation and increasing the saliency for external stimuli by reducing sensory gating at subcortical level. This behavior might serve as a preparatory step to compensate for external disturbances and to enhance processing and integration of all incoming external stimuli to update the current sensorimotor state. In contrast, predictive forward control is accurate in the predictable coupling task due to the integrated sensory feedback from both hands where sensorimotor resources are economized by reducing muscular co-activation and increasing sensory gating.

3.
Cardiovasc Diabetol ; 22(1): 312, 2023 11 13.
Artigo em Inglês | MEDLINE | ID: mdl-37957697

RESUMO

BACKGROUND: Metabolic cardiomyopathy (MCM), characterized by intramyocardial lipid accumulation, drives the progression to heart failure with preserved ejection fraction (HFpEF). Although evidence suggests that the mammalian silent information regulator 1 (Sirt1) orchestrates myocardial lipid metabolism, it is unknown whether its exogenous administration could avoid MCM onset. We investigated whether chronic treatment with recombinant Sirt1 (rSirt1) could halt MCM progression. METHODS: db/db mice, an established model of MCM, were supplemented with intraperitoneal rSirt1 or vehicle for 4 weeks and compared with their db/ + heterozygous littermates. At the end of treatment, cardiac function was assessed by cardiac ultrasound and left ventricular samples were collected and processed for molecular analysis. Transcriptional changes were evaluated using a custom PCR array. Lipidomic analysis was performed by mass spectrometry. H9c2 cardiomyocytes exposed to hyperglycaemia and treated with rSirt1 were used as in vitro model of MCM to investigate the ability of rSirt1 to directly target cardiomyocytes and modulate malondialdehyde levels and caspase 3 activity. Myocardial samples from diabetic and nondiabetic patients were analysed to explore Sirt1 expression levels and signaling pathways. RESULTS: rSirt1 treatment restored cardiac Sirt1 levels and preserved cardiac performance by improving left ventricular ejection fraction, fractional shortening and diastolic function (E/A ratio). In left ventricular samples from rSirt1-treated db/db mice, rSirt1 modulated the cardiac lipidome: medium and long-chain triacylglycerols, long-chain triacylglycerols, and triacylglycerols containing only saturated fatty acids were reduced, while those containing docosahexaenoic acid were increased. Mechanistically, several genes involved in lipid trafficking, metabolism and inflammation, such as Cd36, Acox3, Pparg, Ncoa3, and Ppara were downregulated by rSirt1 both in vitro and in vivo. In humans, reduced cardiac expression levels of Sirt1 were associated with higher intramyocardial triacylglycerols and PPARG-related genes. CONCLUSIONS: In the db/db mouse model of MCM, chronic exogenous rSirt1 supplementation rescued cardiac function. This was associated with a modulation of the myocardial lipidome and a downregulation of genes involved in lipid metabolism, trafficking, inflammation, and PPARG signaling. These findings were confirmed in the human diabetic myocardium. Treatments that increase Sirt1 levels may represent a promising strategy to prevent myocardial lipid abnormalities and MCM development.


Assuntos
Diabetes Mellitus , Cardiomiopatias Diabéticas , Insuficiência Cardíaca , Animais , Humanos , Camundongos , Diabetes Mellitus/metabolismo , Cardiomiopatias Diabéticas/genética , Cardiomiopatias Diabéticas/prevenção & controle , Insuficiência Cardíaca/metabolismo , Inflamação/metabolismo , Lipidômica , Lipídeos , Miócitos Cardíacos/metabolismo , PPAR gama/metabolismo , Sirtuína 1/genética , Sirtuína 1/metabolismo , Volume Sistólico , Triglicerídeos/metabolismo , Função Ventricular Esquerda
4.
Eur Heart J ; 43(19): 1794-1798, 2022 05 14.
Artigo em Inglês | MEDLINE | ID: mdl-35567549

RESUMO

The association between the dissemination of scientific articles on Twitter and online visibility (as assessed by the Altmetric Score) is still controversial, and the impact on citation rates has never been rigorously addressed for cardiovascular medicine journals using a randomized design. The ESC Journals Study randomized 695 papers published in the ESC Journal Family (March 2018-May 2019) for promotion on Twitter or to a control arm (with no active tweeting from ESC channels) and aimed to assess whether Twitter promotion was associated with an increase in citation rates (primary endpoint) and of the Altmetric Score. This is the final analysis including 694 articles (one paper excluded due to retraction). After a median follow-up of 994 days (interquartile range: 936-1063 days), Twitter promotion of articles was associated with a 1.12 (95% confidence interval: 1.08-1.15) higher rate of citations, and this effect was independent of the type of article. Altmetric Attention Score and number of users tweeting were positive predictors for the number of citations. A social media strategy of Twitter promotion for cardiovascular medicine papers seems to be associated with increased online visibility and higher numbers of citations.


Assuntos
Publicações Periódicas como Assunto , Mídias Sociais , Bibliometria , Humanos , Fator de Impacto de Revistas
5.
Sensors (Basel) ; 21(11)2021 Jun 07.
Artigo em Inglês | MEDLINE | ID: mdl-34200346

RESUMO

Increasing temperatures and drought occurrences recently led to soil moisture depletion and increasing tree mortality. In the interest of sustainable forest management, the monitoring of forest soil properties will be of increasing importance in the future. Vis-NIR spectroscopy can be used as fast, non-destructive and cost-efficient method for soil parameter estimations. Microelectromechanical system devices (MEMS) have become available that are suitable for many application fields due to their low cost as well as their small size and weight. We investigated the performance of MEMS spectrometers in the visual and NIR range to estimate forest soil samples total C and N content of Ah and Oh horizons at the lab. The results were compared to a full-range device using PLSR and Cubist regression models at local (2.3 ha, n: Ah = 60, Oh = 50) and regional scale (State of Saxony, Germany, 184,000 km2, n: Ah = 186 and Oh = 176). For each sample, spectral reflectance was collected using MEMS spectrometer in the visual (Hamamatsu C12880MA) and NIR (NeoSpetrac SWS62231) range and using a conventional full range device (Veris Spectrophotometer). Both data sets were split into a calibration (70%) and a validation set (30%) to evaluate prediction power. Models were calibrated for Oh and Ah horizon separately for both data sets. Using the regional data, we also used a combination of both horizons. Our results show that MEMS devices are suitable for C and N prediction of forest topsoil on regional scale. On local scale, only models for the Ah horizon yielded sufficient results. We found moderate and good model results using MEMS devices for Ah horizons at local scale (R2≥ 0.71, RPIQ ≥ 2.41) using Cubist regression. At regional scale, we achieved moderate results for C and N content using data from MEMS devices in Oh (R2≥ 0.57, RPIQ ≥ 2.42) and Ah horizon (R2≥ 0.54, RPIQ ≥2.15). When combining Oh and Ah horizons, we achieved good prediction results using the MEMS sensors and Cubist (R2≥ 0.85, RPIQ ≥ 4.69). For the regional data, models using data derived by the Hamamatsu device in the visual range only were least precise. Combining visual and NIR data derived from MEMS spectrometers did in most cases improve the prediction accuracy. We directly compared our results to models based on data from a conventional full range device. Our results showed that the combination of both MEMS devices can compete with models based on full range spectrometers. MEMS approaches reached between 68% and 105% of the corresponding full ranges devices R2 values. Local models tended to be more accurate than regional approaches for the Ah horizon. Our results suggest that MEMS spectrometers are suitable for forest soil C and N content estimation. They can contribute to improved monitoring in the future as their small size and weight could make in situ measurements feasible.


Assuntos
Sistemas Microeletromecânicos , Poluentes do Solo , Florestas , Alemanha , Solo , Poluentes do Solo/análise
6.
Peptides ; 138: 170504, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33539873

RESUMO

Stress impairs the hypothalamic-pituitary-gonadal (HPG) axis, probably through its influence on the hypothalamic-pituitary-adrenal (= interrenals in the teleost, HPI) axis leading to reproductive failures. In this study, we investigated the response of hypothalamic neuropeptides, gonadotropin-inhibitory hormone (GnIH), a component of the HPG axis, and corticotropin-releasing hormone (CRH) a component of the HPI axis, to acute social defeat stress in the socially hierarchical male Nile tilapia (Oreochromis niloticus). Localization of GnIH cell bodies, GnIH neuronal processes, and numbers of GnIH cells in the brain during acute social defeat stress was studied using immunohistochemistry. Furthermore, mRNA levels of GnIH and CRH in the brain together with GnIH receptor, gpr147, and adrenocorticotropic hormone (ACTH) in the pituitary were quantified in control and socially defeated fish. Our results show, the number of GnIH-immunoreactive cell bodies and GnIH mRNA levels in the brain and the levels of gpr147 mRNA in the pituitary significantly increased in socially defeated fish. However, CRH and ACTH mRNA levels did not change during social defeat stress. Further, we found glucocorticoid type 2b receptor mRNA in laser captured immunostained GnIH cells. These results show that acute social defeat stress activates GnIH biosynthesis through glucocorticoid receptors type 2b signalling but does not change the CRH and ACTH mRNA expression in the tilapia, which could lead to temporary reproductive dysfunction.


Assuntos
Hormônio Liberador da Corticotropina/genética , Hormônio Liberador de Gonadotropina/biossíntese , Estresse Psicológico/genética , Tilápia/fisiologia , Hormônio Adrenocorticotrópico/biossíntese , Hormônio Adrenocorticotrópico/fisiologia , Animais , Encéfalo/fisiologia , Hormônio Liberador da Corticotropina/fisiologia , Feminino , Hormônio Liberador de Gonadotropina/genética , Hormônio Liberador de Gonadotropina/fisiologia , Gonadotropinas/biossíntese , Gonadotropinas/genética , Masculino , Hipófise/metabolismo , Reprodução/genética , Reprodução/fisiologia , Derrota Social , Tilápia/genética
7.
Prev Med Rep ; 24: 101583, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34976644

RESUMO

Guidelines recommend brief smoking cessation interventions for hospitalized smokers reporting low motivation-to-quit. However, an intensive smoking cessation intervention may improve smoking cessation for these smokers. We conducted a secondary analysis of a pre-post interventional study that tested the efficacy of a proactive approach systematically offering intensive smoking cessation intervention to all hospitalized smokers with acute coronary syndrome (ACS) compared to a reactive approach offering it only to smokers willing to quit. We analyzed data from one study site in Switzerland, which recorded motivation-to-quit smoking at study inclusion between 08.2009 and 02.2012. The primary outcome was smoking cessation at 1- and 5-year. We tested for interaction by participant's motivation-to-quit score (low vs. high motivation), and calculated multivariable adjusted risk ratios (RR), stratified by motivation score. We obtained motivation scores for 230 smokers. Follow-up was 94% (217/230) at 1-year and 68% (156/230) at 5-year. Among participants with low motivation to quit, 19% of smokers in the reactive phase had quit at 1 year compared to 50% of smokers in the proactive phase (multivariable adjusted RR = 2.85, 95%CI:0.91-8.91). Among highly motivated smokers, rates did not differ between phases: 48% vs. 49% (multivariable adjusted RR = 1.02, 95%CI:0.75-1.39, p-value for interaction between motivation-to-quit categories = 0.10). At 5-year follow-up, the point estimates were similar. While our study has limitations inherent to the study design and sample size, we found that a proactive approach to offer systematic smoking cessation counseling for smokers with ACS reporting low motivation to quit was associated with higher smoking cessation rates at 1 year.

8.
J Am Heart Assoc ; 9(15): e017293, 2020 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-32700630

RESUMO

Compared with the extensive data on left-sided infective endocarditis (IE), there is much less published information on the features and management of right-sided IE. Right-sided IE accounts for 5% to 10% of all IE cases, and compared with left-sided IE, it is more often associated with intravenous drug use, intracardiac devices, and central venous catheters, all of which has become more prevalent over the past 20 years. In this manuscript on right-sided IE we provide an up-to-date overview on the epidemiology, etiology, microbiology, potential locations of infection in the right heart, diagnosis, imaging, common complications, management, and prognosis. We present updated information on the treatment of pacemaker and device infections, infected fibrin sheaths that appear to be an easily missed source of infection after central line as well as pacemaker removal. We review current data on the AngioVac percutaneous aspiration device, which can obviate the need for surgery in patients with infected pacemaker leads and fibrin sheaths. We also focused on advanced diagnostic modalities, such as positron emission tomography/computed tomography. All of these are supported by specific case examples with detailed echocardiographic imaging from our experience.


Assuntos
Endocardite/etiologia , Endocardite/terapia , Adulto , Idoso , Antibacterianos/administração & dosagem , Procedimentos Cirúrgicos Cardíacos , Ecocardiografia , Eletrodos Implantados/efeitos adversos , Endocardite/complicações , Endocardite/diagnóstico por imagem , Feminino , Humanos , Masculino , Infecções Estafilocócicas/complicações , Infecções Estafilocócicas/diagnóstico por imagem , Infecções Estafilocócicas/etiologia , Infecções Estafilocócicas/terapia , Staphylococcus aureus , Abuso de Substâncias por Via Intravenosa/complicações
9.
Eur Heart J Acute Cardiovasc Care ; 9(6): 589-598, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29862825

RESUMO

BACKGROUND: Controversy remains regarding the prevalence of hyperglycaemia in non-diabetic patients hospitalised with acute coronary syndrome and its prognostic value for long-term outcomes. METHODS AND RESULTS: We evaluated the prevalence of hyperglycaemia (defined as fasting glycaemia ⩾10 mmol/l) among patients with no known diabetes at the time of enrolment in the prospective Special Program University Medicine-Acute Coronary Syndromes cohort, as well as its impact on all-cause death, myocardial infarction, stroke and incidence of diabetes at one year. Among 3858 acute coronary syndrome patients enrolled between December 2009-December 2014, 709 (18.4%) had known diabetes, while 112 (3.6%) of non-diabetic patients had hyperglycaemia at admission. Compared with non-hyperglycaemic patients, hyperglycaemic individuals were more likely to present with ST-elevation myocardial infarction and acute heart failure. At discharge, hyperglycaemic patients were more frequently treated with glucose-lowering agents (8.9% vs 0.66%, p<0.001). At one-year, adjudicated all-cause death was significantly higher in non-diabetic patients presenting with hyperglycaemia compared with patients with no hyperglycaemia (5.4% vs 2.2%, p=0.041) and hyperglycaemia was a significant predictor of one-year mortality (adjusted hazard ratio 2.39, 95% confidence interval 1.03-5.56). Among patients with hyperglycaemia, 9.8% had developed diabetes at one-year, while the corresponding proportion among patients without hyperglycaemia was 1.8% (p<0.001). In multivariate analysis, hyperglycaemia at presentation predicted the onset of treated diabetes at one-year (odds ratio 4.15, 95% confidence interval 1.59-10.86; p=0.004). CONCLUSION: Among non-diabetic patients hospitalised with acute coronary syndrome, a fasting hyperglycaemia of ⩾10 mmol/l predicted one-year mortality and was associated with a four-fold increased risk of developing diabetes at one year.


Assuntos
Síndrome Coronariana Aguda/sangue , Glicemia/metabolismo , Jejum/sangue , Hiperglicemia/sangue , Síndrome Coronariana Aguda/complicações , Diabetes Mellitus , Feminino , Seguimentos , Humanos , Hiperglicemia/complicações , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Fatores de Risco
10.
Int J Cardiol ; 303: 8-13, 2020 03 15.
Artigo em Inglês | MEDLINE | ID: mdl-31859113

RESUMO

BACKGROUND: The relevance of the IMPROVE-IT trial on real-life practice has not been explored in patients with ACS. METHODS: A prospective Swiss cohort of 6266 patients hospitalized for ACS between 2009 and 2017 with a one-year follow-up. The primary endpoints were the ezetimibe use overall or in combination with high-intensity statin at discharge and at one year after ACS. Secondary endpoint was LDL-C target achievement at one year in a subsample of 2984 patients. Relative Ratios (RR) were used to assess changes in primary endpoints before and after the publication of IMPROVE-IT, adjusting for age, sex, diabetes, prior myocardial infarction, LDL-C and attendance to cardiac rehabilitation. RESULTS: The period following the publication of the IMPROVE-IT trial was associated with a steady increase in the use of ezetimibe at discharge (from 1.8% to 3.8%, P < 0.001, adjusted RR 2.85, 95% CI 1.90-4.25) and at one year (from 5.0% to 13.8%, P < 0.001, adjusted RR 3.00, 95% CI 2.40-3.75). The combination of high-intensity statin and ezetimibe rose from 0.9% to 2.1% at discharge (P < 0.001, adjusted RR 3.35, 95% CI 1.90-5.89) and from 2.1% to 7.8% at one year (P < 0.001, adjusted RR 3.98, 95% CI 2.90-5.47). The period following the publication of the IMPROVE-IT trial was associated with an improvement of LDL-C target <1.8 mmol/L (adjusted RR 1.37, 95% CI 1.12-1.68). CONCLUSIONS: After the publication of the IMPROVE-IT trial, the use of ezetimibe was increased by three-fold in a large contemporary cohort of ACS patients, concomitant with an improved LDL-C target achievement.


Assuntos
Síndrome Coronariana Aguda/prevenção & controle , LDL-Colesterol/sangue , Ezetimiba/uso terapêutico , Sinvastatina/uso terapêutico , Síndrome Coronariana Aguda/sangue , Síndrome Coronariana Aguda/diagnóstico , Anticolesterolemiantes/uso terapêutico , Biomarcadores/sangue , Quimioterapia Combinada , Feminino , Seguimentos , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos
11.
Elife ; 82019 09 16.
Artigo em Inglês | MEDLINE | ID: mdl-31524600

RESUMO

Motor fatigability emerges when demanding tasks are executed over an extended period of time. Here, we used repetitive low-force movements that cause a gradual reduction in movement speed (or 'motor slowing') to study the central component of fatigability in healthy adults. We show that motor slowing is associated with a gradual increase of net excitability in the motor network and, specifically, in primary motor cortex (M1), which results from overall disinhibition. Importantly, we link performance decrements to a breakdown of surround inhibition in M1, which is associated with high coactivation of antagonistic muscle groups. This is consistent with the model that a loss of inhibitory control might broaden the tuning of population vectors such that movement patterns become more variable, ill-timed and effortful. We propose that the release of inhibition in M1 is an important mechanism underpinning motor fatigability and, potentially, also pathological fatigue as frequently observed in patients with brain disorders.


Assuntos
Fadiga , Mãos/fisiologia , Movimento , Adulto , Eletroencefalografia , Feminino , Voluntários Saudáveis , Humanos , Imageamento por Ressonância Magnética , Masculino , Modelos Neurológicos , Córtex Motor/fisiologia , Adulto Jovem
12.
Am J Med ; 132(6): e597, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-31221371
13.
Eur J Clin Invest ; 49(7): e13117, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30937890

RESUMO

BACKGROUND: Minimal lipoprotein(a) [Lp(a)] target values are advocated for high-risk cardiovascular patients. We investigated the prognostic value of Lp(a) in the acute setting of patients with acute coronary syndromes (ACS). MATERIALS AND METHODS: Plasma levels of Lp(a) were collected at time of angiography from 1711 patients hospitalized for ACS in a multicentre Swiss prospective cohort. Associations between elevated Lp(a) ≥30 mg/dL (cut-off corresponding to the 75th percentile of the assay) or Lp(a) tertiles at baseline, and major adverse cardiovascular events (MACE) at 1 year, defined as a composite of cardiac death, myocardial infarction or stroke, were assessed using hazard ratios (HR) and 95% confidence intervals (CI) adjusting for traditional cardiovascular risk factors (age, sex, smoking, diabetes, hypertension, low-density lipoprotein cholesterol [LDL-C], high-density lipoprotein cholesterol [HDL-C] and triglycerides. RESULTS: Lp(a) levels range between 2.5 and 132 mg/dL with a median value of 6 mg/dL and a mean value of 14.2 mg/dL. A total of 276 patients (23.0%) had Lp(a) plasma levels ≥30 mg/dL. Patients with elevated Lp(a) were more likely to be of female gender and to have higher levels of total cholesterol, LDL-C, HDL-C and triglycerides. Higher Lp(a) was associated with failure to reach the LDL-C target <1.8 mmol/L at 1 year (HR 1.71, 95% CI 1.13-2.58, P = 0.01). No association was found between elevated Lp(a) and MACE at 1 year (HR 1.05, 95% CI 0.64-1.73), nor for Lp(a) tertiles (HR 0.82, 95% CI 0.52-1.28, P > 0.20) or standardized continuous variables (0.98, 95% CI 0.82-1.19 for each increase of standard deviation). CONCLUSIONS: Our real-world data suggest high Lp(a) levels at time of angiography are not predictive for cardiovascular outcomes in patients otherwise medically well controlled, but might be useful to identify patients who would not be on LDL-C targets 1 year after ACS.


Assuntos
Síndrome Coronariana Aguda/sangue , Lipoproteína(a)/metabolismo , Biomarcadores/metabolismo , HDL-Colesterol/metabolismo , LDL-Colesterol/metabolismo , Morte Súbita Cardíaca/etiologia , Feminino , Humanos , Hiperlipoproteinemia Tipo II , Masculino , Pessoa de Meia-Idade , Infarto do Miocárdio/etiologia , Prognóstico , Estudos Prospectivos , Acidente Vascular Cerebral/etiologia , Triglicerídeos/metabolismo
15.
ASAIO J ; 65(6): 601-604, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-30299298

RESUMO

Ventricular assist device (VAD) implantation has improved quality of life and short-term survival for advanced heart failure patients. There are limited data from single-center studies addressing the characteristics and etiologies of 30 day readmissions after VAD implant. We used the Nationwide Readmissions Database (NRD) 2014 to identify insertion of implantable heart assist system during index admission. Primary and secondary outcomes were 30 day readmissions and leading etiologies, respectively. We analyzed 1,481 patients who received VAD during the primary admission of whom 1,315 patients survived to hospital discharge (mortality rate 11.2%), and 60.6% were discharged to a nursing facility. One hundred and thirty-one (10.0%) patients were readmitted within 30 days of primary hospitalization. Leading etiologies of 30 day readmission were bleeding (24%), heart failure (18%), and device complications (14%). Mean length of stay during readmission was 13.8 days with a mortality rate of 2.1%. Fifty percent of 30 day readmissions were readmitted from day 22 to 30. Variables for predictors of 30 day readmissions were not statistically significant. By identifying gastrointestinal bleeding, heart failure, and device complications as leading etiologies of 30 day readmission post-VAD implantation, providers can potentially modify practices to prevent hospital readmissions, decreasing cost of care, and improving the quality of life of patients.


Assuntos
Coração Auxiliar , Readmissão do Paciente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Insuficiência Cardíaca/terapia , Coração Auxiliar/efeitos adversos , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Estados Unidos
17.
Int J Cardiol ; 268: 179-186, 2018 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-30047409

RESUMO

AIMS: Hyperglycaemia-induced reactive oxygen species (ROS) are key mediators of cardiac dysfunction. Intensive glycaemic control (IGC) has failed to reduce risk of heart failure in patients with diabetes but the underlying mechanisms remain to be elucidated. The present study investigates whether epigenetic regulation of the pro-oxidant adaptor p66Shc contributes to persistent myocardial dysfunction despite IGC. METHODS AND RESULTS: p66Shc expression was increased in the heart of diabetic mice, and 3-week IGC by slow-release insulin implants did not revert this phenomenon. Sustained p66Shc upregulation was associated with oxidative stress, myocardial inflammation and left ventricular dysfunction, as assessed by conventional and 2D speckle-tracking echocardiography. In vivo gene silencing of p66Shc, performed during IGC, inhibited ROS production and restored cardiac function. Furthermore, we show that dysregulation of methyltransferase DNMT3b and deacetylase SIRT1 causes CpG demethylation and histone 3 acetylation on p66Shc promoter, leading to persistent transcription of the adaptor. Altered DNMT3b/SIRT1 axis in the diabetic heart was explained by upregulation of miR-218 and miR-34a. Indeed, in human cardiomyocytes exposed to high glucose, inhibition of these miRNAs restored the expression of DNMT3b and SIRT1 and erased the adverse epigenetic signatures on p66Shc promoter. Consistently, reprogramming miR-218 and miR-34a attenuated persistent p66Shc expression and ROS generation. CONCLUSIONS: In diabetic left ventricular dysfunction, a complex epigenetic mechanism linking miRNAs and chromatin modifying enzymes drives persistent p66Shc transcription and ROS generation. Our results set the stage for pharmacological targeting of epigenetic networks to alleviate the clinical burden of diabetic cardiomyopathy.


Assuntos
Diabetes Mellitus Experimental/metabolismo , Epigênese Genética/fisiologia , Hiperglicemia/metabolismo , Proteína 1 de Transformação que Contém Domínio 2 de Homologia de Src/biossíntese , Disfunção Ventricular Esquerda/metabolismo , Animais , Diabetes Mellitus Experimental/genética , Hiperglicemia/genética , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Espécies Reativas de Oxigênio/metabolismo , Proteína 1 de Transformação que Contém Domínio 2 de Homologia de Src/deficiência , Disfunção Ventricular Esquerda/genética
18.
Am J Med ; 131(10): 1155-1160, 2018 10.
Artigo em Inglês | MEDLINE | ID: mdl-29856962

RESUMO

In recent years, advances in technology have enabled hand-held echocardiography (HHE) to generate high-quality 2-dimensional and color Doppler images. As these devices become smaller, simpler, and more affordable, the question of whether HHE can augment or replace auscultation as the primary mode of cardiovascular diagnosis has become increasingly more relevant. If widely implemented, HHE has the potential for significant cost savings and better resource utilization. This review examines studies comparing the sensitivities of auscultation, HHE, and standard echocardiography in detecting various valvular lesions and discusses why current evidence supports the use of HHE to augment the physical examination, which can lead to more reliable and rapid bedside diagnoses, triage, and appropriate treatment of structural cardiac abnormalities.


Assuntos
Ecocardiografia , Doenças das Valvas Cardíacas/diagnóstico , Precisão da Medição Dimensional , Ecocardiografia/métodos , Ecocardiografia/normas , Humanos
19.
Eur Heart J ; 39(22): 2047-2062, 2018 06 07.
Artigo em Inglês | MEDLINE | ID: mdl-29850820

RESUMO

The clinical expert consensus statement on takotsubo syndrome (TTS) part II focuses on the diagnostic workup, outcome, and management. The recommendations are based on interpretation of the limited clinical trial data currently available and experience of international TTS experts. It summarizes the diagnostic approach, which may facilitate correct and timely diagnosis. Furthermore, the document covers areas where controversies still exist in risk stratification and management of TTS. Based on available data the document provides recommendations on optimal care of such patients for practising physicians.


Assuntos
Cardiomiopatia de Takotsubo/diagnóstico , Cardiomiopatia de Takotsubo/terapia , Algoritmos , Arritmias Cardíacas/etiologia , Angiografia por Tomografia Computadorizada , Angiografia Coronária , Gerenciamento Clínico , Ecocardiografia , Eletrocardiografia , Humanos , Imageamento por Ressonância Magnética , Imagem de Perfusão do Miocárdio , Recidiva , Cardiomiopatia de Takotsubo/complicações , Resultado do Tratamento
20.
Eur Heart J ; 39(22): 2032-2046, 2018 06 07.
Artigo em Inglês | MEDLINE | ID: mdl-29850871

RESUMO

Takotsubo syndrome (TTS) is a poorly recognized heart disease that was initially regarded as a benign condition. Recently, it has been shown that TTS may be associated with severe clinical complications including death and that its prevalence is probably underestimated. Since current guidelines on TTS are lacking, it appears timely and important to provide an expert consensus statement on TTS. The clinical expert consensus document part I summarizes the current state of knowledge on clinical presentation and characteristics of TTS and agrees on controversies surrounding TTS such as nomenclature, different TTS types, role of coronary artery disease, and etiology. This consensus also proposes new diagnostic criteria based on current knowledge to improve diagnostic accuracy.


Assuntos
Cardiomiopatia de Takotsubo/diagnóstico , Cardiomiopatia de Takotsubo/fisiopatologia , Distribuição por Idade , Catecolaminas/metabolismo , Doença da Artéria Coronariana/fisiopatologia , Vasoespasmo Coronário/fisiopatologia , Humanos , Transtornos Mentais/epidemiologia , Microcirculação , Doenças do Sistema Nervoso/epidemiologia , Placa Aterosclerótica/fisiopatologia , Fatores de Risco , Distribuição por Sexo , Cardiomiopatia de Takotsubo/epidemiologia , Cardiomiopatia de Takotsubo/metabolismo , Terminologia como Assunto
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