Results 11 to 20 of about 84,351 (216)

Cerebral Oximetry in Syncope and Syndromes of Orthostatic Intolerance [PDF]

Frontiers in Cardiovascular Medicine, 2019
Cerebral autoregulation is crucial for maintaining cerebral blood flow and perfusion. In recent years, the importance of cerebral oxygenation in syncope and orthostatic intolerance (OI) has received increased attention. Cerebral tissue oxygenation can be
Fabrizio Ricci, Artur Fedorowski, Hannes Holm   +2 more
exaly   +4 more sources

Plasma metabolomic profile in orthostatic intolerance children with high levels of plasma homocysteine [PDF]

Italian Journal of Pediatrics
Background Orthostatic intolerance, which includes vasovagal syncope and postural orthostatic tachycardia syndrome, is common in children and adolescents.
Yaqi Li, Baoling Bai, Hui Wang, Haojie Wu, Yanjun Deng, Chen Shen, Qin Zhang, Lin Shi   +7 more
doaj   +3 more sources

Orthostatic Intolerance in Older Persons: Etiology and Countermeasures [PDF]

Frontiers in Physiology, 2017
Orthostatic challenge produced by upright posture may lead to syncope if the cardiovascular system is unable to maintain adequate brain perfusion. This review outlines orthostatic intolerance related to the aging process, long-term bedrest confinement ...
Nandu Goswami, Andrew P. Blaber, Helmut Hinghofer-Szalkay, Jean-Pierre Montani   +3 more
doaj   +2 more sources

Orthostatic intolerance as a potential contributor to prolonged fatigue and inconsistent performance in elite swimmers

BMC Sports Science, Medicine and Rehabilitation, 2022
Background Athletic underperformance is characterized by fatigue and an inability to sustain a consistent exercise workload. We describe five elite swimmers with prolonged fatigue and athletic underperformance.
Lindsay S. Petracek, Ella F. Eastin, Ian R. Rowe, Peter C. Rowe   +3 more
doaj   +2 more sources

Syndromes of orthostatic intolerance: a hidden danger [PDF]

Journal of Internal Medicine, 2013
AbstractOrthostatic hypotension (OH) is a relatively common heterogenous and multifactorial disorder, traditionally classified as neurogenic (less common but often more severe) or nonneurogenic (more common, with no direct signs of autonomic nervous system disease).
A, Fedorowski, O, Melander
core   +4 more sources

Pediatric Disorders of Orthostatic Intolerance [PDF]

Pediatrics, 2018
Orthostatic intolerance (OI), having difficulty tolerating an upright posture because of symptoms or signs that abate when returned to supine, is common in pediatrics. For example, ∼40% of people faint during their lives, half of whom faint during adolescence, and the peak age for first faint is 15 years.
Julian M, Stewart, Jeffrey R, Boris, Gisela, Chelimsky, Phillip R, Fischer, John E, Fortunato, Blair P, Grubb, Geoffrey L, Heyer, Imad T, Jarjour, Marvin S, Medow, Mohammed T, Numan, Paolo T, Pianosi, Wolfgang, Singer, Sally, Tarbell, Thomas C, Chelimsky   +13 more
openaire   +3 more sources

Postural tachycardia during head-up tilt test predicts persistent orthostatic intolerance in young adults

Zdravniški Vestnik, 2013
Background: Head-up tilt (HUT) test is an important tool in establishing the cause of past syncope. As postural tachycardia is associated with orthostatic intolerance, we hypothesise that heart rate (HR) increase during the early phase of HUT can be used
Mojca Kirbiš, Fajko F. Bajrović, Mojca Čižek Sajko, Bernard Meglič, Anton Grad   +4 more
doaj   +1 more source

Validation of the Chinese orthostatic discriminant and Severity Scale (ODSS) for detection of orthostatic intolerance syndrome [PDF]

Heliyon
Background: Orthostatic intolerance (OI) is the inability to tolerate orthostatic stress during any postural change. The etiology of OI varies, and methods to obtain a specific diagnosis and plan appropriate treatment are important.
Weiting Tang, Hui Gu, Bin Chen, Sheng Hu, Wenjie Fan, Yong You   +5 more
doaj   +2 more sources

Circulating Autoantibodies Against Vasoactive Biomarkers Related to Orthostatic Intolerance in Long COVID Patients Compared to No-Long-COVID Populations: A Case-Control Study [PDF]

Biomolecules
Endothelial dysfunction mediated by elevated levels of autoantibodies against vasoactive peptides occurring after COVID-19 infection is proposed as a possible pathomechanism for orthostatic intolerance in long COVID patients.
Emilie Han, Katrin Müller-Zlabinger, Ena Hasimbegovic, Laura Poschenreithner, Nina Kastner, Babette Maleiner, Kevin Hamzaraj, Andreas Spannbauer, Martin Riesenhuber, Anja Vavrikova, Antonia Domanig, Christian Nitsche, Dominika Lukovic, Thomas A. Zelniker, Mariann Gyöngyösi   +14 more
doaj   +2 more sources

Autoimmune Antibodies in Orthostatic Intolerance Syndromes. [PDF]

Physiol Res
Orthostatic intolerance (OI) is defined as the development of characteristic symptoms while standing, which significantly improve by recumbency. The most common forms are vasovagal syncope (VVS), orthostatic hypotension, and postural orthostatic tachycardia syndrome (POTS).
Lukáčová M, Mitro P, Lazúrová Z, Hijová E, Bertková I, Valová K.   +5 more
europepmc   +3 more sources