Results 81 to 90 of about 11,551 (253)

Impaired peripheral oxygen delivery during submaximal exercise in adults with long COVID

open access: yesPhysiological Reports, Volume 14, Issue 8, April 2026.
Abstract Long COVID (LC) is a multisystem condition that is linked to distinct pathologies including viral persistence, immunological dysfunction, endothelial damage, and mitochondrial dysfunction. To date, limited research has assessed peripheral tissue hypoxia to better understand LC symptom exacerbation. Forty‐six people with LC and 10 controls (CON)
Callum Thomas   +6 more
wiley   +1 more source

Near-infrared spectroscopy muscle oximetry of patients with postural orthostatic tachycardia syndrome [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2018
Postural orthostatic tachycardia syndrome (POTS) is a disabling condition characterized by orthostatic intolerance with tachycardia in the absence of drop-in blood pressure.
Parvathi Kadamati   +7 more
doaj   +1 more source

Utilizing the Boston Syncope Observation Management Pathway to Reduce Hospital Admission and Decrease Adverse Outcomes [PDF]

open access: yes, 2019
Introduction: In an age of increasing scrutiny of each hospital admission, emergency department (ED) observation has been identified as a low-cost alternative. Prior studies have shown admission rates for syncope in the United States to be as high as 70%.
Grossman, Shamai A.   +7 more
core   +2 more sources

Long COVID Syndrome and Associated New Daily Persistent Headache (NDPH) Presenting With Crossed Clonus Response

open access: yesClinical Case Reports, Volume 14, Issue 3, March 2026.
ABSTRACT Evaluating patients following a COVID‐19 infection with multiple chronic, progressive symptoms can be challenging, but easy to navigate by using the temporal profile obtained from the clinical history, findings from the neurological exam, and screening for red flag symptoms.
Emma Wetmore   +4 more
wiley   +1 more source

Perioperative care of an adolescent with postural orthostatic tachycardia syndrome

open access: yesSaudi Journal of Anaesthesia, 2010
Postural orthostatic tachycardia syndrome (POTS) is a disorder characterized by postural tachycardia in combination with orthostatic symptoms without associated hypotension. Symptoms include light-headedness, palpitations, fatigue, confusion, and anxiety,
Kernan Scott, Tobias Joseph
doaj  

Cooccurrence of Postural Orthostatic Tachycardia Syndrome with Two Different Clinical Entities

open access: yesCase Reports in Pediatrics, 2016
Postural orthostatic tachycardia syndrome (POTS) is an abnormal heart rate response to a positional change. Several potential mechanisms for pathophysiology of POTS are defined. This syndrome can coexist with different clinical situations. In our report,
Funda Oztunc   +4 more
doaj   +1 more source

What is the best approach to the evaluation of resting tachycardia for an adult? [PDF]

open access: yes, 2007
The best evidence about the diagnostic evaluation of resting tachycardias in adults is currently outlined by practice guidelines. 1 Initial evaluation includes clinical history, physical examination, and 12-lead electrocardiogram (ECG).
DeVoe, Jennifer E.   +1 more
core  

Taming the Cytokine Storm: Therapeutic Strategies for Post‐Acute Sequelae of SARS‐CoV‐2 Infection

open access: yesHealth Science Reports, Volume 9, Issue 3, March 2026.
ABSTRACT Background and Aim Post‐acute sequelae of SARS‐CoV‐2 infection (PASC), commonly referred to as long COVID, has emerged as a significant global health concern, marked by persistent symptoms and chronic inflammation following recovery from acute COVID‐19.
Emmanuel Ifeanyi Obeagu
wiley   +1 more source

Reduced Stroke Volume and Brain Perfusion Drive Postural Hyperventilation in Postural Orthostatic Tachycardia Syndrome

open access: yesJACC: Basic to Translational Science
Summary: Postural hyperventilation has been implicated as a cause of postural orthostatic tachycardia syndrome (POTS), yet the precise mechanisms underlying the heightened breathing response remain unclear.
Jacquie R. Baker, PhD   +7 more
doaj   +1 more source

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