My father was hospitalized for heart attack two years ago, and his symptoms were chest tightness and pain. I have seen and heard a lot about the disadvantages of stent surgery, can there be a better treatment than stenting, or is there an advanced stent that does not block the blood vessels? If there is a good treatment, how should I treat it? Bing Liu, Department of Cardiology, Beijing Hospital, Ministry of Health: Only different types of drug-coated stents can be considered. Stent restenosis occurs in 5-8% of the new generation of drug stents, which is something that the medical community cannot overcome at this time. Then there is a direct correlation between stent restenosis and the level of blood glucose, blood pressure and lipid control. Another option is open-heart bypass surgery, but if the bypass surgery is done with a thigh vein, there will be 50-70% reocclusion in 3-5 years.