Prosthetic valve implantation is one of the effective treatments for heart valve disease. The prosthetic valve is somewhat of a foreign body to the human body, and postoperative patients who suffer from bacterial inflammation may have prosthetic valve involvement. This is rare but a relatively serious postoperative complication. In such cases, antimicrobials are often ineffective in killing the bacteria completely, and they can hide in the seams of the prosthetic valve, releasing into the bloodstream repeatedly and causing fever. If the bacteria grow on the prosthetic valve, it can form a superfluous organism, which, if dropped, may cause symptoms of embolism of the body circulation such as cerebral infarction. Re-operation is the only way to address this type of disease. Since there was a previous heart surgery, there will be adhesions in the tissues around the heart, so it is difficult and risky to operate again.