Libman-Sacks endocarditis: the diagnostic importance of two-dimensional echocardiography.

In 1980, a 44-year-old woman with the diagnosis of systemic lupus erythematosus presented with fever and mitral and aortic valvular insufficiency. Blood cultures were sterile. M-mode echocardiograms of the mitral valve revealed an image resembling vegetations of infective endocarditis. The diagnosis was rejected after two-dimensional echocardiography which failed to demonstrate vegetation. Two-dimensional echocardiography should therefore be systematically utilized in the diagnosis of valvular lesions in patients with systemic lupus erythematosus.