Overview and Comparison of Infectious Endocarditis and Non-infectious Endocarditis: A Review of 814 Autoptic Cases

We examined evidence on infective and non-infective endocarditis obtained from a database of 50,403 clinical autopsies performed at an Italian general hospital between January 1983 and December 2006. Out of 814 endocarditis cases, 409 were of infective endocarditis (IE) and 405 non-infective (NIE). The median age at the time of death was 78 years for those with IE and 83 for those with NIE. Data were collected on gender, clinical history, comorbidities, kind of affected valve (non-prosthetic/mechanical/biological), pathological features of endocarditis, endocarditis complications and microbiological agents. The diagnosis of IE was frequently missed and these conditions were often complicated by cardiovascular events. IE was more common among patients with prior valve infection or cardiovascular surgery, while malignancies were frequent comorbidities of NIE. In general, we found several data that differ from those generally present in the scientific literature, and this could be explained by the fact that data on IE and NIE are generally obtained from surgical and clinical databases, while we analysed only autoptic cases.