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| http://dx.doi.org/10.1016/j.brs.2017.10.019 | DOI Listing |
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Right ventricular reserve in cardiopulmonary disease: a simultaneous hemodynamic and three-dimensional echocardiographic study.
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Department of Cardiology, Ospedale San Luca IRCCS Istituto Auxologico Italiano, Milano, Italy; Department of Management, Information and Production Engineering, University of Bergamo, Dalmine (BG), Italy.
Background: RV reserve has been linked to exercise capacity and prognosis in cardiopulmonary diseases. However, evidence in this setting is limited, due to the complex shape and load dependency of the RV. We sought to study right ventricular (RV) adaptation to exercise by simultaneous three-dimensional echocardiography (3DE) and right heart catheterization (RHC).
View Article and Find Full Text PDFDetecting Hypoxia Through the Non-Invasive and Simultaneous Monitoring of Sweat Lactate and Tissue Oxygenation.
Biosensors (Basel)
November 2024
Department of Chemistry, University of Waterloo, 200 University Ave West, Waterloo, ON N2L 3G1, Canada.
Hypoxia, characterized by inadequate tissue oxygenation, may result in tissue damage and organ failure if not addressed. Current detection approaches frequently prove insufficient, depending on symptoms and rudimentary metrics such as tissue oxygenation, which fail to comprehensively identify the onset of hypoxia. The European Pressure Ulcer Advisory Panel (EPUAP) has recognized sweat lactate as a possible marker for the early identification of decubitus ulcers, nevertheless, neither sweat lactate nor oxygenation independently provides an appropriate diagnosis of hypoxia.
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Mitodicure GmbH, Kriftel, Germany.
Background: Recent studies provide strong evidence for a key role of skeletal muscle pathophysiology in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). In a 2021 review article on the pathophysiology of ME/CFS, we postulated that hypoperfusion and ischemia can result in excessive sodium and calcium overload in skeletal muscles of ME/CFS patients to cause mitochondrial damage. Since then, experimental evidence has been provided that supports this concept.
View Article and Find Full Text PDFNew evidence for baroreflex and respiratory chemoreflex mediated cerebral sympathetic activation in humans.
J Appl Physiol (1985)
December 2024
Department of Kinesiology, Faculty of Medicine, Université Laval, Québec, Canada.
The brain is highly innervated by sympathetic nerve fibres; however, their physiological purpose is poorly understood. We hypothesized that unilateral cerebral norepinephrine (NE) spillover, an index of cerebral sympathetic nerve activity (SNA), would be elevated when engaging the baroreflex [via lower-body negative pressure (LBNP; -20 and -40 Torr)] and respiratory chemoreflexes [via carbon dioxide (CO) administration (+8 Torr)], independently, and in combination. Twelve young and healthy participants (5 females) underwent simultaneous blood sampling from the right radial artery and internal jugular vein.
View Article and Find Full Text PDFDo Exercise and Magnesium Sulfate Improve Infertility Caused by Lithium Carbonate in Male Rats?
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November 2024
Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran.
Background: Lithium (Li) is widely used in the treatment of bipolar disorder, but it may lead to toxicity in the reproductive system. Considering the harmful effect of Li consumption on fertility and the positive effect of magnesium sulfate (MgSo) and moderate-intensity training (MIT) on improving the quality of men's sperm, the current research was conducted to determine the impact of MIT and MgSo on infertility caused by Li.
Materials And Methods: Seventy-two male rats were divided into 12 groups, control, Li10 mg/kg/day/ip, MgSo 80 mg/kg/day/ip; MIT; Li40 mg/kg/day/ip; Li10+MgSo; Li10+MIT; Li10+MgSo+MIT; Li40+MgSo; Li40+MIT; Li40+MgSo+MIT.
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