More serious cases of coronary artery disease require heart stents and heart bypass surgery, which usually have a better prognosis. The details are as follows: 1, stent implantation surgery: post-operative time is too long can occur restenosis, with the advancement of medical technology, currently using drug-coated stents, can extend the use of time to maintain patency for 15 years; 2, coronary artery bypass surgery: divided into two materials, including arterial bridges and venous bridges, arterial bridges can completely replace the role of normal coronary arteries, can be longer to maintain patency.