Millions of people with angina get a stent put in to widen their arteries
A study by Imperial College London found the operation has a huge risk of damaging the arteries but does not improve quality of life
The results add to growing evidence that procedures including keyhole knee surgery and arthritis operations only work because of a ‘placebo effect’
http://www.dailymail.co.uk/health/article-5043857/Stent-operations-waste-time-angina.html