Abstract:
INTRODUCTION:Frequency-dependent acceleration of relaxation (FDAR) ensures appropriate ventricular filling at high heart rates and results from accelerated sarcoplasmic/endoplasmic reticulum calcium ATPase (SERCA) activity independent of calcium removal from the cell. Because lipopolysaccharide (LPS) challenge may induce aberrations in calcium trafficking and protein phosphorylation, we tested whether LPS would abolish FDAR in rats. METHODS:Following LPS injection, changes in force-frequency relationship and FDAR were studied in cardiomyocytes, isolated hearts and in vivo by echocardiography. Calcium uptake and phosphatase activities were studied in sarcoplasmic reticulum (SR) vesicle preparations. Western blots of phospholamban and calcium/calmodulin-dependent protein kinase II, and serine/threonine phosphatase activity were studied in heart preparations. RESULTS:In cardiomyocytes and isolated heart preparations, reductions in time constant of relaxation (tau) and time to 50% relaxation at increasing rate of pacing were blunted in LPS-treated rats compared with controls. Early diastolic velocity of the mitral annulus (Ea), a relaxation parameter which correlates in vivo with tau, was reduced in LPS rats compared with control rats. LPS impaired SR calcium uptake, reduced phospholamban phosphorylation and increased serine/threonine protein phosphatase activity. In vivo inhibition of phosphatase activity partially restored FDAR, reduced phosphatase activity and prevented phospholamban dephosphorylation in LPS rat hearts. CONCLUSIONS:LPS impaired phospholamban phosphorylation, cardiac force-frequency relationship and FDAR. Disruption of frequency-dependent acceleration of LV relaxation, which normally participates in optimal heart cavity filling, may be detrimental in sepsis, which is typically associated with elevated heart rates and preload dependency.
journal_name
Crit Carejournal_title
Critical care (London, England)authors
Joulin O,Marechaux S,Hassoun S,Montaigne D,Lancel S,Neviere Rdoi
10.1186/cc7712subject
Has Abstractpub_date
2009-01-01 00:00:00pages
R14issue
1eissn
1364-8535issn
1466-609Xpii
cc7712journal_volume
13pub_type
杂志文章相关文献
CRITICAL CARE文献大全abstract::Climate change and environmental stewardship are phrases that have been defining the past few decades and promoting change in our societies. The sensitivities of intensive care as a specialty make the process of greening an intensive care unit a challenge, but not one that is insurmountable. This paper discusses oppor...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc9409
更新日期:2011-01-01 00:00:00
abstract:INTRODUCTION:Recombinant human activated protein C (rhAPC) is the first drug for which a reduction of mortality in severe sepsis has been demonstrated. However, the mechanism by which this reduction in mortality is achieved is still not clearly defined. The aim of the present study was to evaluate the dynamics of the a...
journal_title:Critical care (London, England)
pub_type: 杂志文章,多中心研究
doi:10.1186/cc3774
更新日期:2005-10-05 00:00:00
abstract:INTRODUCTION:Sepsis, severe sepsis and septic shock are common conditions with high mortality. Their early diagnosis in the Emergency Department (ED) is one of the keys to improving survival. Procalcitonin (PCT) has been used as a biomarker in septic patients but has limited specificity and can be elevated in other sce...
journal_title:Critical care (London, England)
pub_type: 杂志文章,多中心研究
doi:10.1186/cc12847
更新日期:2013-07-30 00:00:00
abstract:BACKGROUND:Acute kidney injury (AKI) is common among intensive care unit (ICU) patients. AKI is highly heterogeneous, with variable links to poor outcomes. Current approaches to classify AKI severity and identify patients at highest risk for poor outcomes focus on the maximum change in serum creatinine (SCr) values. Ho...
journal_title:Critical care (London, England)
pub_type: 杂志文章,多中心研究
doi:10.1186/s13054-016-1546-4
更新日期:2016-11-17 00:00:00
abstract::The European Clinical Trials Directive requires an informed consent from the patient or a proxy in drug trials. Although informed consent is a valuable tool to protect patients' rights in clinical trials, this requirement largely impedes research in critical care settings, and if pursued in this context, it does not p...
journal_title:Critical care (London, England)
pub_type: 评论,杂志文章
doi:10.1186/cc10113
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVES:To evaluate the incidence and mortality of acute respiratory distress syndrome (ARDS) in medical/respiratory intensive care units (MICUs/RICUs) to assess ventilation management and the use of adjunct therapy in routine clinical practice for patients fulfilling the Berlin definition of ARDS in mainland China....
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-020-03112-0
更新日期:2020-08-20 00:00:00
abstract:INTRODUCTION:The diagnostic and prognostic value of arterial blood gas analysis (ABGA) parameters in unselected patients presenting with acute dyspnea to the Emergency Department (ED) is largely unknown. METHODS:We performed a post-hoc analysis of two different prospective studies to investigate the diagnostic and pro...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc10268
更新日期:2011-01-01 00:00:00
abstract:INTRODUCTION:Cardio-renal syndromes are characterized by the impairment of cardiac and renal functions. Plasma and urinary neutrophil gelatinase-associated lipocalin (NGAL), and plasma B-type natriuretic peptide (BNP) are markers of acute kidney injury (AKI) and heart failure (HF), respectively. METHODS:GFR (99mTc-DTP...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc13752
更新日期:2014-02-28 00:00:00
abstract:INTRODUCTION:Tight glucose control therapy (TGC) has been implemented to control hyperglycemia in ICU patients. TGC may also influence serum potassium concentrations. We therefore investigated the influence of TGC on both serum glucose and serum potassium concentrations and associated mortality. METHOD:We performed a ...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-015-0959-9
更新日期:2015-06-22 00:00:00
abstract:INTRODUCTION:The aim of this study was to assess the volume of gas being poorly ventilated or non-ventilated within the lungs of patients treated with mechanical ventilation and suffering from acute respiratory distress syndrome (ARDS). METHODS:A prospective, descriptive study was performed of 25 sedated and paralysed...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc3058
更新日期:2005-04-01 00:00:00
abstract:BACKGROUND:Mottling around the knee, reflecting a reduced skin blood flow, is predictive of mortality in patients with septic shock. However, the causative pathophysiology of mottling remains unknown. We hypothesized that the cutaneous hypoperfusion observed in the mottled area is related to regional endothelial dysfun...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-017-1742-x
更新日期:2017-06-23 00:00:00
abstract:INTRODUCTION:Respiratory viruses are increasingly recognized as significant etiologies of pneumonia among hospitalized patients. Advanced technologies using multiplex molecular assays and polymerase-chain reaction increase the ability to identify viral pathogens and may ultimately impact antibacterial use. METHOD:This...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-015-1120-5
更新日期:2015-11-18 00:00:00
abstract::Ventilator-induced lung injury (VILI) consists of tissue damage and a biological response resulting from the application of inappropriate mechanical forces to the lung parenchyma. The current paradigm attributes VILI to overstretching due to very high-volume ventilation (volutrauma) and cyclic changes in aeration due ...
journal_title:Critical care (London, England)
pub_type: 杂志文章,评审
doi:10.1186/cc10052
更新日期:2011-04-07 00:00:00
abstract:BACKGROUND:In ARDS patients, changes in respiratory mechanical properties and ventilatory settings can cause incomplete lung deflation at end-expiration. Both can promote dynamic hyperinflation and intrinsic positive end-expiratory pressure (PEEP). The aim of this study was to investigate, in a large population of ARDS...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-019-2611-6
更新日期:2019-11-27 00:00:00
abstract:BACKGROUND:The first FDA-approved test to assess risk for acute kidney injury (AKI), [TIMP-2]•[IGFBP7], is clinically available in many parts of the world, including the USA and Europe. We sought to understand how the test is currently being used clinically. METHODS:We invited a group of experts knowledgeable on the u...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-019-2504-8
更新日期:2019-06-20 00:00:00
abstract:: ...
journal_title:Critical care (London, England)
pub_type: 评论,信件
doi:10.1186/s13054-019-2310-3
更新日期:2019-01-17 00:00:00
abstract:BACKGROUND:Acute kidney injury (AKI) affects a large proportion of the critically ill and is associated with worse patient outcomes. Early identification of AKI can lead to earlier initiation of supportive therapy and better management. In this study, we evaluate the impact of computerized AKI decision support tool int...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-020-03343-1
更新日期:2020-11-23 00:00:00
abstract::In an effort to reduce the complications related to invasive ventilation, the use of noninvasive ventilation (NIV) has increased over the last years in patients with acute respiratory failure. However, failure rates for NIV remain high in specific patient categories. Several studies have identified factors that contri...
journal_title:Critical care (London, England)
pub_type: 杂志文章,评审
doi:10.1186/cc13141
更新日期:2013-12-05 00:00:00
abstract:INTRODUCTION:A major pathophysiologic mechanism in sepsis is impaired host immunity which results in failure to eradicate invading pathogens and increased susceptibility to secondary infections. Although many immunosuppressive mechanisms exist, increased expression of the inhibitory receptor programmed cell death 1 (PD...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc13176
更新日期:2014-01-04 00:00:00
abstract::Tight glycemic control has engendered large numbers of investigations, with conflicting results. The world has largely embraced intensive insulin as a practice, but applies this therapy with great variability in the manner of glucose control and measurement. The present commentary reviews what we actually know with ce...
journal_title:Critical care (London, England)
pub_type: 评论,杂志文章,评审
doi:10.1186/cc9236
更新日期:2010-01-01 00:00:00
abstract::High-mobility group box 1 (HMGB1) is a DNA-binding protein that also exhibits proinflammatory cytokine-like activity. HMGB1 is passively released by necrotic cells and also is actively secreted by immunostimulated macrophages, dendritic cells, and enterocytes. Although circulating HMGB1 levels are increased relative t...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc6088
更新日期:2007-01-01 00:00:00
abstract::The impressive benefits related to the use of tight glucose control by intensive insulin therapy have not been reproduced until now in multicenter large-scale prospective randomized trials. Although the reasons for these failures are not entirely clear, we suggest the use of a stepwise approach - Safe, Effective Gluco...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc6889
更新日期:2008-01-01 00:00:00
abstract::Sepsis, despite recent therapeutic progress, still carries unacceptably high mortality rates. The adrenergic system, a key modulator of organ function and cardiovascular homeostasis, could be an interesting new therapeutic target for septic shock. Beta-adrenergic regulation of the immune function in sepsis is complex ...
journal_title:Critical care (London, England)
pub_type: 杂志文章,评审
doi:10.1186/cc8026
更新日期:2009-01-01 00:00:00
abstract::Antithrombotic prophylaxis in critically ill patients frequently fails. Venous thromboembolism is associated with adverse clinical outcomes, including a prolonged intensive care unit stay and death. A potential mechanism by which critically ill patients may be predisposed to antithrombotic failure is the inability to ...
journal_title:Critical care (London, England)
pub_type: 评论,杂志文章,评审
doi:10.1186/cc4978
更新日期:2006-01-01 00:00:00
abstract:BACKGROUND:The plasma colloid osmotic pressure (COP) plays a major role in transcapillary fluid balance. There is no information on plasma COP of healthy infants beyond the first post-natal week. The normal COP in healthy adult subjects (25 mmHg) is currently also applied as a reference value for healthy infants. This ...
journal_title:Critical care (London, England)
pub_type: 临床试验,杂志文章
doi:10.1186/cc1043
更新日期:2001-10-01 00:00:00
abstract:INTRODUCTION:The overall prognosis of critically ill patients with cancer has improved during the past decade. The aim of this study was to identify early prognostic factors of intensive care unit (ICU) mortality in patients with cancer. METHODS:We designed a prospective, consecutive, observational study over a one-ye...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/cc5721
更新日期:2007-01-01 00:00:00
abstract:INTRODUCTION:Identifying patients who need damage control resuscitation (DCR) early after trauma is pivotal for adequate management of their critical condition. Several trauma-scoring systems have been developed to identify such patients, but most of them are not simple enough to be used in prehospital settings in the ...
journal_title:Critical care (London, England)
pub_type: 临床试验,杂志文章
doi:10.1186/s13054-014-0648-0
更新日期:2014-11-26 00:00:00
abstract::Two international multicentre randomised controlled trials of drotrecogin alfa (activated) (DrotAA), the Recombinant Human Activated Protein C Worldwide Evaluation of Severe Sepsis (PROWESS) and Administration of Drotrecogin Alfa (Activated) in Early Stage Severe Sepsis (ADDRESS) trials, have produced inconsistent res...
journal_title:Critical care (London, England)
pub_type: 杂志文章,评审
doi:10.1186/cc4947
更新日期:2006-01-01 00:00:00
abstract:BACKGROUND:For patients who survive a critical illness and have their oral endotracheal tube removed, dysphagia is highly prevalent, and without intervention, it may persist far beyond hospital discharge. This pre- and post-intervention study with historical controls tested the effects of a swallowing and oral care (SO...
journal_title:Critical care (London, England)
pub_type: 杂志文章
doi:10.1186/s13054-019-2623-2
更新日期:2019-11-09 00:00:00
abstract:INTRODUCTION:Effects of systemic inflammation on cerebral function are not clear, as both inflammation-induced encephalopathy as well as stress-hormone mediated alertness have been described. METHODS:Experimental endotoxemia (2 ng/kg Escherichia coli lipopolysaccharide [LPS]) was induced in 15 subjects, whereas 10 ser...
journal_title:Critical care (London, England)
pub_type: 临床试验,杂志文章
doi:10.1186/cc9001
更新日期:2010-01-01 00:00:00