INCREASES IN BRAIN OXYGEN EXTRACTION DURING MAXIMAL AEROBIC EXERCISE IN HUMANS

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S31
Author(s):  
Jose Gonzalez-Alonso ◽  
Takuya Osada ◽  
Stefanos Volianitis ◽  
Niels Secher
Keyword(s):  
Aerobic Exercise ◽  
Oxygen Extraction ◽  
Brain Oxygen ◽  
Exercise In Humans

Norepinephrine, but not epinephrine, enhances platelet reactivity and coagulation after exercise in humans

1999 ◽  
Vol 86 (1) ◽  
pp. 133-138 ◽  
Author(s):  
Hideo Ikarugi ◽  
Tomomi Taka ◽  
Shoko Nakajima ◽  
Takanori Noguchi ◽  
Sadahiro Watanabe ◽  
...  
Keyword(s):  
Aerobic Exercise ◽  
Resting State ◽  
Platelet Reactivity ◽  
Healthy Male ◽  
Thrombotic Risk ◽  
In Vitro Method ◽  
Plug Formation ◽  
Exercise In Humans ◽  
Catecholamine Levels

The effects of exercise and catecholamines on platelet reactivity or coagulation and fibrinolysis appear to be inconsistent. This may be partly due to the methods employed in previous studies. In the present study, we investigated the effects of acute aerobic exercise and catecholamines on the thrombotic status by a novel in vitro method, shear-induced hemostatic plug formation (hemostatometry), using nonanticoagulated (native) blood. Aerobic exercise (60% maximal O2consumption) was performed by healthy male volunteers for 20 min, and the effect on platelet reactivity and coagulation was assessed by performing hemostatometry before and immediately after exercise. Exercise significantly increased shear-induced platelet reactivity, coagulation, and catecholamine levels. The effect of catecholamines on platelet reactivity and coagulation was assessed in vitro by adding catecholamines to blood collected in the resting state. The main findings of the present study are that elevation of circulating norepinephrine at levels that are attained during exercise causes platelet hyperreactivity and a platelet-mediated enhanced coagulation. This may be a mechanism of an association of aerobic exercise with thrombotic risk.

scholarly journals Brain Oxygen Extraction by Using MRI in Older Individuals: Relationship to Apolipoprotein E Genotype and Amyloid Burden

Radiology ◽  
2019 ◽  
Vol 292 (1) ◽  
pp. 140-148 ◽  
Author(s):  
Zixuan Lin ◽  
Sandeepa Sur ◽  
Anja Soldan ◽  
Corinne Pettigrew ◽  
Michael Miller ◽  
...  
Keyword(s):  
Apolipoprotein E ◽  
Oxygen Extraction ◽  
Older Individuals ◽  
Amyloid Burden ◽  
Brain Oxygen ◽  
Apolipoprotein E Genotype

scholarly journals Quantification of brain oxygen extraction fraction using QSM and a hyperoxic challenge

2020 ◽  
Vol 84 (6) ◽  
pp. 3271-3285
Author(s):  
Yuhan Ma ◽  
Erin L. Mazerolle ◽  
Junghun Cho ◽  
Hongfu Sun ◽  
Yi Wang ◽  
...  
Keyword(s):  
Oxygen Extraction Fraction ◽  
Oxygen Extraction ◽  
Brain Oxygen ◽  
Extraction Fraction

Cerebral blood flow, cross-brain oxygen extraction, and fontanelle pressure after hypoxic-ischemic injury in newborn infants

1991 ◽  
Vol 118 (2) ◽  
pp. 265-271 ◽  
Author(s):  
Timothy C. Frewen ◽  
Niranian Kissoon ◽  
Jonathan Kronick ◽  
Mervyn Fox ◽  
Richard Lee ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Newborn Infants ◽  
Ischemic Injury ◽  
Oxygen Extraction ◽  
Brain Oxygen ◽  
Flow Cross ◽  
Hypoxic Ischemic Injury

scholarly journals Quantification of brain oxygen extraction and metabolism with [15O]-gas PET: A technical review in the era of PET/MRI

NeuroImage ◽  
2020 ◽  
Vol 220 ◽  
pp. 117136 ◽  
Author(s):  
Audrey P. Fan ◽  
Hongyu An ◽  
Farshad Moradi ◽  
Jarrett Rosenberg ◽  
Yosuke Ishii ◽  
...  
Keyword(s):  
Oxygen Extraction ◽  
Brain Oxygen ◽  
Technical Review

Brain Oxygen Extraction Is Differentially Altered by Alzheimer's and Vascular Diseases

2020 ◽  
Vol 52 (6) ◽  
pp. 1829-1837 ◽  
Author(s):  
Dengrong Jiang ◽  
Zixuan Lin ◽  
Peiying Liu ◽  
Sandeepa Sur ◽  
Cuimei Xu ◽  
...  
Keyword(s):  
Vascular Diseases ◽  
Oxygen Extraction ◽  
Brain Oxygen
Sign in / Sign up

Export Citation Format

Share Document