The so-called success rate of cardiac interventional surgery is 98%, so what is the failure rate of 2%?

The academic "success" of cardiac intervention is a very complicated definition, which contains many contents, such as the degree of remission of vascular stenosis, the number of remission of multiple stenosis, whether there are complications and so on. The "success rate" you mentioned is also estimated from the doctor's propaganda. My understanding is that the intervention was "successful" and there were no serious complications. As for the degree of success, it is hard to say whether it meets the "success" stipulated by the American Heart Association. According to this logic, 2% failure means non-intervention. In my opinion, if a cardiologist says that his success rate of cardiac interventional surgery is 98%, it is estimated that he is not a good doctor, because what he said is unscientific at first glance.