title: Transcranial Doppler ultrasound: valid, invalid, or both?
authors.affiliation: Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, Kelowna, British Columbia, Canada philip.ainslie@ubc.ca.
authors.forename: Philip N
authors.initials: PN
authors.lastname: Ainslie
authors.affiliation: Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, Kelowna, British Columbia, Canada.
authors.forename: Ryan L
authors.initials: RL
authors.lastname: Hoiland
mesh_terms: D002245:Carbon Dioxide / Q000097:blood*; D002533:Cerebral Angiography / Q000379:methods*; D002560:Cerebrovascular Circulation; D005260:Female; D006801:Humans; D006935:Hypercapnia / Q000503:physiopathology*; D016857:Hypocapnia / Q000503:physiopathology*; D018810:Magnetic Resonance Angiography; D008297:Male; D020768:Middle Cerebral Artery / Q000503:physiopathology*; D017585:Ultrasonography, Doppler, Transcranial; D014664:Vasodilation
chemical_list: D002245:Carbon Dioxide