Angioplasty for carotid artery stenosis has had placebo control trials, and you know what they used to measure success? Size of stenosis and blood flow. That's it. Not a questionaire asking "how are you feeling?" The researchers measured blood flow before and after and at monthly intervals up to a year. They used ultrasound to see how carotid stenosis looked, and if there was restenosis it was re-treated. And most importantly, after treatment, they put the study participants on an aftercare program, making sure they had blood thinning treatment and that they exercised and ate better. Trial participants quit smoking or lost weight, if warranted. Because without aftercare and lifestyle changes, restenosis can be immediate, and all gains from angioplasty are lost. IRs know this. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694631/

Angioplasty for carotid artery stenosis has had placebo control trials, and you know what they used to measure success? Size of stenosis and blood flow. That's it. Not a questionaire asking "how are you feeling?" The researchers measured blood flow before and after and at monthly intervals up to a year. They used ultrasound to see how carotid stenosis looked, and if there was restenosis it was re-treated. And most importantly, after treatment, they put the study participants on an aftercare program, making sure they had blood thinning treatment and that they exercised and ate better. Trial participants quit smoking or lost weight, if warranted. Because without aftercare and lifestyle changes, restenosis can be immediate, and all gains from angioplasty are lost. IRs know this. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4694631/