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 14 of 14 for “"orthostatic intolerance"”.
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The Cardiovascular Effects of Resistance Exercise Training on Orthostatic Intolerance in Elderly Individuals.
… a common clinical condition known as orthostatic intolerance. There are little data on the effects of strength training in healthy adults and orthostatic intolerance, and only one study on strength training and elderly adults diagnosed with orthostatic intolerance. Therefore, the …
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ALTERED HEMODYNAMIC, NEUROHUMORAL, AND BRAIN METABOLITE PROFILES IN CHILDREN WITH ORTHOSTATIC INTOLERANCE AND CHRONIC NAUSEA
Orthostatic Intolerance (OI) is a type of autonomic dysfunction affecting >500,000 adults and children in the United States. Upon standing, subjects with OI have impaired blood pressure (BP) regulation that leads to debilitating symptoms of dizziness, fatigue, nausea, and fainting. The development …
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Principal component based system identification and its application to the study of cardiovascular regulation
… microgravity on cardiac autonomic control and orthostatic intolerance (OI). Experimental data from a prolonged bed rest study (simulation of microgravity condition) are analyzed and the conclusions are: 1) prolonged bed rest may impair autonomic control of heart rate; 2) orthostatic intolerance …
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Computational models of cardiovascular response to orthostatic stress
… experimental effort, the mechanisms underlying orthostatic intolerance (OI) following spaceflight remain elusive. The number of hypotheses still under consideration and the lack of a single unifying theory of the pathophysiology of spaceflight-induced OI testify to the difficulty of the problem. …
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Development of a method for calculation of cardiac output using Doppler ultrasound
… for a cardiovascular abnormality called the orthostatic intolerance, which is found in astronauts returning from space as well as people on earth.
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System identification of dynamic closed-loop cardiovascular control of total peripheral resistance by arterial and cardiopulmonary baroreceptors
… (CO) and arterial blood pressure (Pa) against orthostatic stress during re-entry and in the post-flight period. To date, available countermeasures have not been able to eliminate the observed orthostatic hypotension. The mechanisms responsible for the observed orthostatic intolerance are not …
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A Novel Resistance Exercise Machine for Use in a Lower Body Negative Pressure Box to Counteract the Effects of Weightlessness
… LBNP paired with exercise impacts osteoporosis, orthostatic intolerance and cardiovascular health. The combination might also be used to enhance rehabilitation protocols.</p>
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Exercise under artificial gravity - experimental and computational approaches
… and cardiovascular adaptation, which may lead to orthostatic intolerance when astronauts are back on Earth. In order to mitigate the negative effects of weightlessness, several countermeasures are currently in place, particularly very intensive exercise protocols. However, despite these …
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Human readaptation to normal gravity following short-term simulated Martian gravity exposure and the effectiveness of countermeasures
… The causes of postural instability include orthostatic intolerance, modified vestibular functions, and altered muscle gains. This thesis investigates the modifications in human walking gait following exposure to simulated Martian gravity by examining the ground reaction force, muscle …
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Partial Gravity Load Simulation Using Mechanical Off-Loading and Lower Body Negative Pressure
… systems. These effects increase the risk of orthostatic intolerance, bone loss, and conditions such as Spaceflight Associated Neuro-ocular Syndrome (SANS). As spaceflight missions grow longer and more frequent, especially with increased extravehicular activity (EVA) on the Moon or Mars, it is …
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FACILITATING CLINICAL DECISION-MAKING IN REHABILITATION: INNOVATIVE APPROACHES TO SYNTHESIZE AND TRANSLATE EVIDENCE INTO PRACTICE
… of fatigue, post-exertional malaise, orthostatic intolerance, dyspnea, arthralgia, dysphagia, dysphonia, olfactory dysfunction, cognitive impairment, anxiety, and depression. The findings have contributed to generating valuable hypotheses for both clinical practice and future research …
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Multimodal rehabilitation for postural orthostatic tachycardia syndrome (POTS)
… and medical history and assessment for baseline orthostatic intolerance. At pre-training, post-training, and follow-up testing participants completed the Modified Fatigue Impact Scale, Lower Extremity Functional Scale, Rand 36-Item Health Survey 1.0, Trail Making Test (A and B), Center for …
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Designing a Localized Lower Body Negative Pressure Garment for Long-Duration Spaceflight
… to the physiological deconditioning and orthostatic intolerance associated with prolonged microgravity exposure. Traditional LBNP systems, however, are large, stationary devices that require astronauts to remain immobile during use, limiting their integration into daily spaceflight …