[The microsurgical treatment of arterial aneurysms of the vertebrobasilar basin].

Experience in microsurgical treatment of 23 patients with aneurysms of the vertebrobasilar bed at the Institute of Neurosurgery, AMS USSR, is discussed. Some aspects of surgical approaches and the method of removal of the aneurysms are described. Particular attention is focussed on complicated surgical situations which needed non-standard solutions (division of the A1 segment of the anterior cerebral artery and the posterior communicating artery). All patients were operated on in the "cold" period after spontaneous intracranial hemorrhages. The postoperative mortality (one patient) is analysed.