[Functional transcranial dopplerography in an atherosclerotic lesion of the carotid arteries].

Transcranial dopplerography (TDG) examination of the blood flow along the major intracranial arteries and cerebral vascular response to functional loads was performed in 51 patients with stenosis and/or occlusion of the internal carotid artery (ICA). The measurements were made on the equipment "Quantascope-103 PC" (Scimed, England). 74% (26 patients) of ICA occlusion subjects had asymmetry of the linear circulation rate (LCR) in the middle-size cerebral arteries (MCA). It occurred with LCR inhibition on the ipsilateral to the occlusion side. In half of ICA stenosis patients the ipsilateral MSA circulation was also reduced. The difference between the two groups in relation to MCA circulation asymmetry was significant (p < 0.001). Nitroglycerin and hypercapnia tests proved more informative than ortho- and antiorthostatic tests. A relationship was found out between overall stenosis of major brain arteries and blood flow along them.