orthostatic intolerance/крварење

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Hyperadrenergic orthostatic intolerance as a result of postpartum blood loss.

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This article describes a young women in whom orthostatic intolerance developed as a result of protracted postpartum vaginal bleeding. The cardiovascular abnormalities were unresponsive to usual treatment measures, and she required combination therapy directed at increasing plasma volume and

Inspiratory resistance as a potential treatment for orthostatic intolerance and hemorrhagic shock.

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Loss of consciousness due to central hypovolemia can occur due to sudden cardiovascular decompensation in normal individuals or hypovolemic shock in wounded patients. A variety of devices have been developed to sustain perfusion to the brain including anti-G suits worn by pilots and returning

Consequences of the evolutionary cardiovascular challenge of human bipedalism: orthostatic intolerance syndromes, orthostatic hypertension.

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: In quadrupeds, the arterial baroreflex has dominance in the reflex homeostatic responses, which protect against haemorrhage. In humans, it is the low pressure cardiopulmonary reflex, which protects against the analogous cardiovascular challenge of gravity-dependent venous pooling with standing. To

Does goal-directed fluid therapy affect postoperative orthostatic intolerance?: A randomized trial.

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BACKGROUND Early mobilization is important for postoperative recovery but is limited by orthostatic intolerance (OI) with a prevalence of 50% 6 h after major surgery. The pathophysiology of postoperative OI is assumed to include hypovolemia besides dysregulation of vasomotor tone. Stroke

Risks of Adverse Events in Patients With Orthostatic Intolerance Undergoing Surgery With General Anesthesia

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Introduction: Orthostatic intolerance (OI) is a group of disorders characterized by symptoms that occur upon standing and resolve with recumbence. Although well established but not widely recognized, these diagnoses may create uncertainty for clinicians dealing

[A simulated study of effects of simulated hypovolemia on cardiovascular response to orthostatic stress].

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Objective. To study the effects of hypovolemia on cardiovascular response to orthostatic stress, and to investigate the role of hypovolemia in the mechanism of cardiovascular deconditioning and orthostatic intolerance induced by space weightlessness. Method. The effects of loss of blood volume had

Simulation study of the effects of hypovolaemia on cardiovascular response to orthostatic stress.

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To investigate the role played by hypovolaemia in the mechanism of orthostatic intolerance, a mathematical model was developed. The model consisted of seven sub-models that describe: the redistribution of blood induced by lower body negative pressure (LBNP); filling of the left ventricle;

An ultrasonographic classification for diverse clinical symptoms of pediatric nutcracker phenomenon.

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OBJECTIVE The nutcracker phenomenon (NCP) is the significant compression of the left renal vein (LRV) by the aorta and superior mesenteric artery (SMA), and found in the patients with so-called idiopathic renal bleeding, orthostatic proteinuria and severe orthostatic intolerance. The purpose of this

Cardiovascular consequences of weightlessness promote advances in clinical and trauma care.

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Cardiovascular adaptations driven by exposure to weightlessness cause some astronauts to experience orthostatic intolerance upon return to Earth. Maladaptations of spaceflight that lead to hemodynamic instability are temporary, and therefore astronauts provide for researchers a powerful model to

Resting sympathetic baroreflex sensitivity in subjects with low and high tolerance to central hypovolemia induced by lower body negative pressure.

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Central hypovolemia elicited by orthostasis or hemorrhage triggers sympathetically-mediated baroreflex responses to maintain organ perfusion; these reflexes are less sensitive in patients with orthostatic intolerance, and during conditions of severe blood loss, may result in cardiovascular collapse

Regulation of sympathetic nervous system function after cardiovascular deconditioning.

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Humans subjected to prolonged periods of bed rest or microgravity undergo deconditioning of the cardiovascular system, characterized by resting tachycardia, reduced exercise capability, and a predisposition for orthostatic intolerance. These changes in cardiovascular function are likely due to a

Fast-track knee arthroplasty -- status and future challenges.

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BACKGROUND Fast-track programs have been developed for different surgical procedures leading to higher patient satisfaction and lower morbidity. This concept has been extended to knee arthroplasty in recent years. The purpose of this narrative review was to discuss the different aspects of

Blood volume: importance and adaptations to exercise training, environmental stresses, and trauma/sickness.

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This paper reviews the influence of several perturbations (physical exercise, heat stress, terrestrial altitude, microgravity, and trauma/sickness) on adaptations of blood volume (BV), erythrocyte volume (EV), and plasma volume (PV). Exercise training can induce BV expansion: PV expansion usually

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