Patient: In 2003, the EKG reported mitral valve stenosis and insufficiency, heart failure after exertion, digoxin plus diuretics, and was transferred to your hospital. What do we do to prepare for the surgery? Please reply as soon as possible! How long will I have to stay in the hospital after the surgery? What are the risks of the surgery? I just had an EKG at Fu Wai Hospital at the end of October for a moderate mitral aortic stenosis with incomplete closure and moderate regurgitation, and the EKG showed atrial fibrillation. The risk of surgery is generally less than 5% and is usually discharged 2 weeks after surgery (mainly to adjust anticoagulation). Depending on the condition, it depends on whether it is a single valve replacement or a double valve replacement, with a single valve replacement costing about 50,000 RMB and a double valve costing about 70,000 RMB.