Inserting stents into people with chest pain during exercise is big business. But is it also beneficial for the patients? This is doubtful. The reliability and usefulness of exercise stress tests and coronary angiography is also doubtful in relation to deciding whether a patient needs stents or not. As this will surprise most people, I have decided to republish a section about these issues in my 2019 book, Survival in an overmedicated world: Find the evidence yourself. You can read this section here.