PMID: 8985953Dec 1, 1996Paper

Relationship between the flow pattern and vasomotor reactivity in the ophthalmic artery, siphon and vessels within the circle of Willis in the unilateral internal carotid artery occlusion

Neurological Research
V Zbornikova, C Lassvik

Abstract

The aim was to study a relationship between the flow pattern in the ophthalmic artery (OA), the siphon and vessels within the circle of Willis. 27 patients, 22 males and 5 females, mean age 63 +/- 15 years (SD) with unilateral occlusion of the internal carotid artery (ICA) were examined by 3-dimensional Transcranial Doppler scanner. Flow signals from the OA, the siphon and intracranial vessels were registered before and after i.v. injection of 1 g acetazolamide. Pathological flow pattern was found in 18 patients in the OA on the occluded side consisting of 12 retrograde and 6 isoelectric flow directions. After acetazolamide injection retrograde systolic velocities (SV) increased significantly (p < 0.01), but anterograde velocities remained unchanged as did 3 isoelectric flow patterns, 2 turned to retrograde and one to anterograde flow direction. In the siphon lower resting anterograde mean velocities (MV) were found on both sides (p < 0.05) compared to normal subjects. Six patients had the same retrograde flow as in the OA. After acetazolamide MV in the siphon increased (p < 0.01) only on the nonoccluded side. Baseline retrograde ophthalmic SV and MV in the siphon correlated (p < 0.01 and p < 0.05 respectively) with MV in the m...Continue Reading

Citations

Jan 22, 2003·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·A Y Gur, N M Bornstein
Dec 3, 1999·Stroke; a Journal of Cerebral Circulation·M J HartkampW P Mali
Jul 2, 1999·Stroke; a Journal of Cerebral Circulation·M KluytmansM A Viergever

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