Virginia Commonwealth University

About: Virginia Commonwealth University is a education organization based out in Richmond, Virginia, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 23822 authors who have published 49587 publications receiving 1787046 citations. The organization is also known as: VCU.

Factors affecting excitatory amino acid release following severe human head injury

Abstract: Object. Recent animal studies demonstrate that excitatory amino acids (EAAs) play a major role in neuronal damage after brain trauma and ischemia. However, the role of EAAs in patients who have suffered severe head injury is not understood. Excess quantities of glutamate in the extracellular space may lead to uncontrolled shifts of sodium, potassium, and calcium, disrupting ionic homeostasis, which may lead to severe cell swelling and cell death. The authors evaluated the role of EEAs in human traumatic brain injury. Methods. In 80 consecutive severely head injured patients, a microdialysis probe was placed into the gray matter along with a ventriculostomy catheter or an intracranial pressure (ICP) monitor for 4 days. Levels of EAAs and structural amino acids were analyzed using high-performance liquid chromatography. Multifactorial analysis of the amino acid pattern was performed and its correlations with clinical parameters and outcome were tested. The levels of EAAs were increased up to 50 times normal...

The many faces of emotional leadership

Abstract: This article focuses heavily on overviewing and analyzing the seven articles in this special issue on emotions and leadership. The articles are discussed in terms of four key leadership issues. The first issue concerns the traits necessary for leadership. Empathy is shown to be an important variable that is central to both emotional intelligence and leadership emergence. The second issue concerns the relationship of emotions to the leadership process. It is argued that a key leadership function is to manage the emotions of group members, especially with regard to feelings related to frustration and optimism. The third issue involves our perceptions about leaders. Leaders' emotional displays are demonstrated to have a larger impact on perceptions of leaders than the content of the leaders' messages, at least in some circumstances. The fourth area involves the relationship between leadership and performance. Leaders' influences upon emotional process variables are found to have a large impact on performance. The article develops several propositions that summarize the content of this special issue and, in addition, develops new propositions that suggest future areas of research. The article concludes by touching on the review process and acknowledges the reviewers for this special issue.

Inflammation, Coagulation and Cardiovascular Disease in HIV-Infected Individuals

Abstract: Background: The SMART study was a trial of intermittent use of antiretroviral therapy (ART) (drug conservation [DC]) versus continuous use of ART (viral suppression [VS]) as a strategy to reduce toxicities, including cardiovascular disease (CVD) risk. We studied the predictive value of high sensitivity C-reactive protein (hsCRP), interleukin-6 (IL-6) and D-dimer with CVD morbidity and mortality in HIV-infected patients who were enrolled in SMART beyond other measured CVD risk factors. Methods: A blood sample was available in 5098 participants who were enrolled in the SMART study for the measurement of IL-6, hsCRP and D-dimer. Hazard ratios (HR) with 95% CI for CVD events were estimated for each quartile (Q) for each biomarker vs the 1 st quartile and for 1 SD higher levels. For both treatment groups combined, unadjusted and adjusted HRs were determined using Cox regression models. Results: There were 252 participants who had a CVD event over a median follow-up of 29 months. Adjusted HRs (95% CI) for CVD for Q4 vs Q1 were 4.65 (2.61, 8.29), 2.10 (1.40, 3.16), and 2.14 (1.38, 3.33) for IL-6, hsCRP and D-dimer, respectively. Associations were similar for the DC and VS treatment groups (interaction p-values were .0.30). The addition of the three biomarkers to a model that included baseline covariates significantly improved model fit (p,0.001). Area under the curve (AUC) estimates improved with inclusion of the three biomarkers in a model that included baseline covariates corresponding to other CVD risk factors and HIV factors (0.741 to 0.771; p,0.001 for difference). Conclusions: In HIV-infected individuals, IL-6, hsCRP and D-dimer are associated with an increased risk of CVD independent of other CVD risk factors. Further research is needed to determine whether these biomarkers can be used to improve CVD risk prediction among HIV positive individuals.