[Tricuspid endocarditis in heroin addicts (author's transl)].

Two cases of tricuspid endocarditis due to Staphylococcus aureus in two young heroin addicts are reported. In one of them there was concomitant aortic valve involvement. The clinical picture was typical. Tricuspid and aortic valve vegetations were demonstrated by cardiac ultrasonography. The relatively good prognosis of tricuspid endocarditis due to Staphylococcus aureus was confirmed in one of the cases in whom an excellent response to therapy with cephalothin and gentamicin was obtained. Simultaneous aortic involvement worsens the prognosis considerably. The clinical features characteristic of endocarditis in heroin addicts are reviewed, with emphasis in those that permit to distinguish them from endocarditis in the general population. Although only indirect data are available the disease will probably be seen with increasing frequency in Spain.