[Stereotaxic clipping of cerebral arteriovenous aneurysms]

The method of stereotaxic clipping was used in the surgical treatment of 14 patients on whom 16 operations were conducted for clipping of the afferent vessels of arteriovenous aneurysms. A stereotaxic atlas was used for the first time to determine the localization of the aneurysms and the structures they occupied. In 12 patients the aneurysms were found to be unsuitable for radical operation. Besides angiography, examination of the volumetric cerebral blood flow was conducted by the modified Kety and Schmidt method to appraise the eficacy of the operation. The examination of 5 patients showed marked (approximately by half) decrease in the bloodflow after operation in 3 patients and its normalization in 2 patients.