Patient: Fever of 39 for two consecutive months caused by a cold, followed by 6 weeks of continuous penicillin anti-inflammatory treatment. The body temperature was normal. Half a month later, the fever started again at 39 with a rise in the abdomen and back pain. How should I treat this condition and do I need surgery? Li Kang, Department of Cardiology, Beijing Hospital, Ministry of Health: Even if there is no bulge but only mitral valve prolapse, it is still an indication for surgery! At present, since mitral valve prolapse becomes the pathological basis for the occurrence of endocarditis and the resulting infection cannot be eliminated at all, early surgical treatment is always recommended.