[Vision disorders as the first symptom of cerebrovascular insufficiencycaused by the changes in the carotid arteries. Studies using the transcranial Doppler ultrasonic apparatus TC2-64B].
Investigations were carried out in 25 patients with carotid arteries changes. A 2 MHz head was used. Direction of the flow, the average speed and index of pulsation were determined. The results were compared with examinations in 13 healthy subjects. Disturbances of vision were shown by 11 patients (44 p.c.). A normal direction of blood perfusion was observed in 8 arteries (25 p.c.), a reversed one in 22 (69 p.c.), in 2 patients no Doppler's signal could be obtained. In arteries with a reversal flow of blood the authors observed the maximal mean speed and the lowest pulsation index. In neither case did the ophthalmological examinations reveal any embolic material. It seems that visual disturbances in patients with carotid arteries changes may be caused by a change of direction of the blood flow from a normal to a reversed one.
Staszkiewicz
J
J
Kliniki Okulistycznej CMKP w Warszawie.
Hilgertner
L
L
Czechowicz-Janicka
K
K
Szostek
M
M
Staszkiewicz
W
W
D000328:Adult; D002340:Carotid Artery Diseases / Q000150:complications* / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000150:complications* / Q000503:physiopathology; D005123:Eye / Q000098:blood supply*; D006801:Humans; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D013997:Time Factors; D014463:Ultrasonography / Q000295:instrumentation; D015354:Vision, Low / Q000000981:diagnostic imaging / Q000209:etiology*
Zaburzenia widzenia jako pierwszy objaw niedostateczności ukrwienia mózgu spowodowanego zmianami w tetnicach szyjnych. Badania przy zastosowaniu transcranial Doppler TC2-64-B.