Keywords: Vessels, Blood vessels, Vascular Reactivity, Oxygenation, Blood VelocityTo assess the acute effects of tobacco and electronic cigarette inhalation on vascular function, multiple MRI markers were analyzed in a study targeting peripheral, central and neurovascular beds of healthy young subjects. Smokers and vapers (9 subjects for a total N=15 study visits), ages 22 to 45 years, underwent two MRI scans, with a smoking or vaping challenge in between. Data from smoking/vaping challenges were combined to assess for their pooled effect. Smoking/vaping had significant acute effects on peripheral reactivity, notably on the superficial femoral artery flow-mediated dilation, baseline velocity and superficial femoral vein baseline oxygen saturation, among others.
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