Endothelial function is not always well preserved in obese patients with mild OSA.

We read with great interest the article of Dr. Blomster H and colleagues entitled:“Endothelial function is well preserved in obese patients with mild obstructive sleep apnea”[1]. In the manuscript, the authors clearly show that mild obstructive sleep apnea (OSA) does not correlate with endothelial dysfunction, measured by brachial artery flow-mediated dilatation (FMD), assuming that in mild OSA, endothelial function is still preserved. The data are very interesting, although the authors did not analyze the time of onset of symptoms, as well as ...