心内膜炎主要系瓣膜的炎变,有非感染性和感染性之分。前者主要由风湿热引起;后者主要以细菌为病原体。细菌性心内膜炎按发病经过及病程又分为急性和亚急性,实际上两者间并无明显的界限。一般讲,急性者病程在6周内,发病急,病情重,多为全身严重感染的一部分,瓣膜及腱索受损严重,常发生瓣膜溃疡或穿孔,腱索断裂,如不经积极治疗,多在6周内死亡,其细菌的毒力强,常见者为金黄色葡萄球菌。亚急性者多在原有先天性心脏病或后天性风湿性心脏 Endocarditis is the main valve inflammation, non-infectious and infectious points. The former is mainly caused by rheumatic fever; the latter mainly bacteria as pathogens. Bacterial endocarditis according to the course and course of disease is divided into acute and subacute, in fact, there is no clear boundary between the two. In general, the course of acute disease within 6 weeks, the incidence of acute and severe illness, mostly as part of a serious systemic infection, severe damage to the valve and tendon, valve ulcer or perforation often occurs, rupture of tendons, such as without active treatment, More than 6 weeks of death, the virulence of bacteria, common for Staphylococcus aureus. Subacute mostly in the original congenital heart disease or acquired rheumatic heart