nirs

Deoxygenation Trends and Their Multivariate Association with Self-Reported Fatigue in Post-COVID Syndrome Anja-Maria Ladek, Marianna Lucio, Andreas Weiß, Thomas Knauer, Helena Sarmiento, Miriam Ilgner, Marie Jakobi, Laura Barteczko, Marion Ganslmayer, Jürgen Rech, Antonio Bergua, Christian Y...

Long-COVID Postural Tachycardia Syndrome: A deep phenotyping study Nicholas W Larsen; Jannika V Machnik; Jordan Seliger; Ruba Shaik; Christopher H Gibbons; Paul J Utz; Maarten G Lansberg; Srikanth Muppidi; Safwan Jaradeh; Mitchell G Miglis BACKGROUND Postural tachycardia syndrome (POTS) has...

In summary, the findings demonstrated that increasing difficulty levels in the cognitive task resulted in reduced accuracy, prolonged response times, and increased perceived difficulty scores. Task performance remained unaffected by the inclination levels. Additionally, the results revealed an...

Abstract Cerebral blood flow (CBF) is vital for delivering oxygen and nutrients to the brain. Many forms of orthostatic intolerance (OI) involve impaired regulation of CBF in the upright posture, which results in disabling symptoms that decrease quality of life. Because CBF is not easy to...

Abstract Mitochondria are essential in supplying energy to skeletal muscle. Near-infrared spectroscopy (NIRS) was developed to noninvasively assess mitochondrial capacity (mV̇O2max) as a rate constant of metabolic recovery after exercise. Purpose This study measured the time course mV̇O2max...

COVID-19 may Enduringly Impact cognitive performance and brain haemodynamics in undergraduate students McNeill; Marshall; Fernando; Harrison; Machado To date, 770 million people worldwide have contracted COVID-19, with many reporting long-term “brain fog”. Concerningly, young adults are both...

Abstract The near-infrared spectroscopy (NIRS) vascular occlusion test (VOT) assesses microvascular reperfusion. Two strategies have been employed to quantify reperfusion following reactive hyperemia, but it is unclear if both yield similar results when comparing biological sex. Purpose...

Insights into COVID-19 pathophysiology from a longitudinal multisystem report during acute infection Brihmat; Bayram; Bheemreddy; Saleh; Yue; Forrest The Coronavirus disease 2019 (COVID-19), an illness caused by a SARS-CoV-2 viral infection, has been associated with neurological and...

Abstract Orthostatic hypotension (OH) is prevalent in older adults and can cause falls and hospitalization. Diagnostic intermittent blood pressure (BP) measurements are only a proxy for cerebral perfusion and do not reflect daily-life BP fluctuations. Near-infrared spectroscopy (NIRS)-measured...

Brain hypoxia, neurocognitive impairment, and quality of life in people post-COVID-19 Adingupu, Damilola D.; Soroush, Ateyeh; Hansen, Ayden; Twomey, Rosie; Dunn, Jeff F. OBJECTIVES Systemic hypoxia occurs in COVID-19 infection; however, it is unknown if cerebral hypoxia occurs in convalescent...

written by: Mitchell G. Miglis, Noor Syed, Melissa M. Cortez, Frans C. Viser, C. Linda MC van Campen, Peter Novak Unfortunately one can only see the references here: https://link.springer.com/article/10.1007/s10286-024-01036-1 One can see the start of the letter here...

Muscle Haemodynamics and Oxygen Saturation during Exercise and Recovery in Chronic Fatigue Syndrome Patients Jyotpal Singh, Andy D. Roberts, Michael F. Harrison, Nina H. Leavins, James C. Croll, Bharath Krishnan, Patrick Neary INTRODUCTION Controversy exists in the literature whether or not...

The use of muscle near-infrared spectroscopy NIRS to assess the aerobic training loads of world-class rowers Andrzej Klusiewicz; Kinga Rębiś; Mariusz Ozimek; Adam Czaplicki The objectives of this study were (1) to characterize the changes in oxygenation derived from muscle near-infrared...

Muscle oxygenation of the paretic and nonparetic legs during and after exercise in chronic stroke: Implications for mobility Elizabeth Whyte; Scott Thomas; Susan Marzolini BACKGROUND Oxygen delivery and demand are reduced in the paretic leg of individuals after stroke. However, it is unknown...

Near-infrared spectroscopy-derived muscle oxygen saturation on a 0% to 100% scale: reliability and validity of the Moxy Monitor Andri Feldmann; Roger W. Schmitz; Daniel Erlacher Near-infrared spectroscopy (NIRS) to monitor muscle oxygen saturation (SmO2) is rapidly expanding into applied sports...

Full title: Comparison of the muscle oxygenation during submaximal and maximal exercise tests in patients post-coronavirus disease 2019 syndrome with pulmonary involvement ABSTRACT Introduction Pulmonary involvement is prevalent in patients with coronavirus disease 2019 (COVID-19). Arterial...

Impaired oxygen delivery to muscle in chronic fatigue syndrome McCully, Kevin K.; Natelson, Benjamin H. The purpose of this study was to determine if chronic fatigue syndrome (CFS) is associated with reduced oxygen delivery to muscles. Patients with CFS according to CDC (Center for Disease...

Introduction Monitoring muscle metabolic activity via blood lactate is a useful tool for understanding the physiological response to a given exercise intensity. Recent indications suggest that skeletal muscle oxygen saturation (SmO2), an index of the balance between local O2 supply and demand...

Reduced Cerebrovascular Oxygenation in Individuals with Post-Acute COVID-19 Syndrome PACS “long COVID” Adingupu, Damilola D.; Soroush, A.; Hansen, A.; Twomey, R.; Dunn, J. F. There is evidence that hypoxia occurs in the brain of some individuals who contracted the COVID-19 disease. Furthermore...

This study found reduced oxygen extraction in the thigh muscles of people with ongoing symptoms after Covid-19 infections as compared to healthy controls: Structural and functional impairments of skeletal muscle in patients with [PASC], 2023, Colosio et al. The measure is "Δ[HHbMb]peak (%...