The evolution of endocarditis and its prognosis vary according to many factors: the type of germ responsible, the precocity of the diagnosis, the existence of a complication, the site of occurrence. These complications of endocarditis are frequent, sometimes revealing. EI is complicated by heart failure, atrioventricular conduction disorders, peri-vascular abscesses, embolic, neurological, renal and septic complications. Despite improvements in diagnosis and therapeutic methods, diagnosis is sometimes difficult, management remains very complicated and morbidity and mortality remain high. Studies are still needed to study the prognosis and to determine the predictive factors for hospital mortality and long-term mortality.