By the time you have had seven percutaneous coronary interventions, eight angioplasties, and eight stents, you may decide "Enough is enough." At least author Robert Rister did. When a fourth doctor placed a fourth stent in the same segment of the same artery, a stent inside a stent inside a stent inside a stent, he asked what the doctor could do if the artery closed yet again."Well just give you another stent," the doctor replied. That's when Rister...