We present a 45-year-old patient on chronic hemodialysis who suffered aortic endocarditis by Staphylococcus haemolyticus after bacteremia associated with a venous catheter, which was used temporarily during the maturing phase of a Cimino-Brescia arteriovenous fistula in the left forearm. Three weeks after starting antibiotic therapy, the patient suffered a septic pulmonary embolism. The catheter had been removed 4 weeks before the embolism. Thrombophlebitis of lower limbs, infection or thrombosis of the vascular access, and the involvement of right-sided cardiac structures were all discarded. We assumed that the pulmonary episode was probably a consequence of the paradoxical passage of embolic material, detached from the aortic valve, from arterial to venous circulation through the arteriovenous fistula.