Vascular responsiveness determined by near‐infrared spectroscopy measures of oxygen saturation

What is the central question of this study? Can the near‐infrared spectroscopy (NIRS)‐derived reperfusion rate (slope 2) of tissue oxygen saturation (StO2) be correlated with flow‐mediated dilation (FMD), the commonly used method to assess vascular endothelial function? What is the main finding and its importance? The present data were able to establish a correlation between the reperfusion rate of StO2 and percentage FMD in healthy young men. These data suggest that NIRS‐derived slope 2 StO2 can be used as a measure of vascular endothelial function.

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