Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Pressure reactivity"”.
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Investigating cerebrovascular pressure reactivity in a large cohort of children with severe traumatic brain injury
… blood flow within a range of systemic blood pressures, and the loss of this mechanism has been associated with mortality and worse outcomes in adult TBI. Paediatric studies of CA disturbance are few and consist of small cohorts. Given the differences between adult and paediatric TBI …
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The effects of melatonin on vascular function, oxidative stress and blood pressure reactivity during a high sodium diet
… can also cause exaggerated increases in blood pressure (BP) during different physiological perturbations (BP reactivity). Vascular dysfunction and increased BP reactivity are directly related to future atherosclerosis and hypertension (HTN) development, respectively, and thus, to CVD mortality. …
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A Comparison of Relaxation Techniques on Blood Pressure Reactivity and Recovery Assessing the Moderating Effect of Anger Coping Style
… and relaxation techniques on cardiovascular reactivity and recovery in blood pressure (BP). Eighty-nine students from Eastern Virginia Medical School in Norfolk, Virginia participated. The participants were instructed to rest for ten minutes (baseline), complete a math task with harassment …
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Cerebral autoregulation in children with traumatic brain injury: Comparing the autoregulatory index (ARI) to pressure reactivity index (PRx) and their associations with cerebral physiological parameters
As an important hemodynamic mechanism, pressure autoregulation protects the brain against inappropriate fluctuations in cerebral blood flow subject to changing cerebral perfusion pressures. In acute neurological illnesses, including traumatic brain injury in children, impaired autoregulation is …
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Intracranial Monitoring after Severe Traumatic Brain Injury
… explore cerebral insults due raised intracranial pressure, decreased cerebral perfusion pressure and impaired cerebral pressure reactivity after traumatic brain injury. In chapter 2, the importance of intracranial pressure, cerebral perfusion pressure and pressure reactivity in regulating the …
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The Association of Cognitive Function with Autonomic-Cardiovascular Reactivity to and Recovery From Stress
… function may affect autonomic-cardiovascular reactivity and recovery to psychologically stressful tasks as such reactions, over time, may contribute to the development of cardiovascular disease.</p> <p>The current study analyzed data from 209 healthy middle-age adults. This included four …
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The effects of female gender role appraisal and body image threat on the stress responses of women: a validation of the feminine gender role stress scale
… likely to evidence behavioral and physiological reactivity to a "feminine" (body image) stressor than a neutral control condition. The FGRS scale was developed to measure the cognitive tendency among women to appraise specific situations as stressful due to commitments, beliefs, and values that …
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Mathematical Modelling of Brain Haemodynamics and Pressure-Volume Compensation
… which requires an accurate understanding of pressure-volume interactions inside the cranium. This thesis used a hydrodynamic model representing the circulation of cerebral fluids to investigate the relationships between intracranial pressure (ICP) and cerebral blood volume (CBV) changes. The …
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Cardiovascular reactivity to stress in men: effects of masculine gender role stress appraisal and masculine performance challenge
… research has shown that excessive cardiovascular reactivity may be important in the development of coronary heart disease. The present study examines the role of masculine cognitive appraisal of stress as a mediator of cardiovascular reactivity in men. The reactivity of men who differed on a …
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Cardiovascular Reactivity to and Recovery from Laboratory Tasks in Low and High Worry Women
… have been related to exaggerated cardiovascular reactivity and delayed recovery to laboratory stressors, and to increased risk of cardiovascular disease. Previous research on the anxiety-cardiovascular system relationship, including data from Knepp and Friedman (2008), are included to support …
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Clinical Applications of Neuromonitoring Following Acute Brain Injury
… injury (TBI) patients with invasive intracranial pressure (ICP), arterial blood pressure (ABP), and transcranial Doppler ultrasonography (TCD) recordings. Data analysis focused on ICP microsensor accuracy, compensatory reserve, the pulsatility of brain signals (ICP and TCD), and cerebral arterial …
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Optimization of the assessment of cerebral autoregulation in neurocritical care unit
… blood flow despite changes in cerebral perfusion pressure (CPP). It plays an important protective role against the danger of ischaemia or oedema of the brain. Over the years, various methods for CA assessment have been proposed, while most commonly used parameters include the autoregulation index …
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Continuous Multi-Modal Monitoring of Cerebrovascular Reactivity in Adult Traumatic Brain Injury
… Continuously updating indices of cerebrovascular reactivity provide a convenient and continuous metric regarding an individual patients’ autoregulatory status. To date, the vast majority of the literature has focused on pressure reactivity index (PRx), which has emerged as the “gold standard” for …
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Quantifying methodological uncertainties and navigating feasibilities in monitoring of cerebral autoregulation - Towards individualised management of TBI.
… to mark and reject periods of data where the pressure reactivity (PRx) metric calculations were invalid. The reliability of automated PRx-derived optimal cerebral perfusion pressure (CPPopt) estimates was also addressed, with a special focus on prospective bedside application. Finally, Part …
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Mechanisms of Cerebral Autoregulation in Traumatic Brain Injury
… of paediatric-specific data regarding the pressure reactivity index (PRx), with existing data limited to small or retrospective single centre studies. Studying Trends in AutoRegulation in Severe Head Injury in Paediatrics (STARSHIP) is the first multicentre prospective trial and aimed to …