[Objective tinnitus caused by arteriovenous malformations in the region of transverse and signoid sinus (author's transl)].

Surgical problems concerning the treatment of objective tinnitus caused by arteriovenous malformations of the posterior fossa are discussed. Angiographies and clinical signs of seven patients are reported. In two cases the operative procedure of Hugosson and Bergstroöm was sucessful. In principle the transverse and sigmoid sinus are exposed and separated from the arterial shunts.