Open AccessEvaluation of cross-circulation through circle of Willis using an ultrasonic Doppler technique. Part II. Comparison between blood flow velocity by ultrasonic Doppler flowmetry and cerebrovascular resistance.
Author(s) -
S Yoneda,
T Nukada,
Kazufumi Kimura,
Kenichi Tanaka,
K Ashida,
T. Asai,
Hideki Etani,
Mitsuyoshi Imaizumi,
Hiroshi Abe
Publication year - 1981
Publication title -
stroke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.397
H-Index - 319
eISSN - 1524-4628
pISSN - 0039-2499
DOI - 10.1161/01.str.12.4.484
Subject(s) - medicine , blood flow , ultrasonic sensor , hemodynamics , doppler effect , transcranial doppler , circle of willis , cerebral circulation , cerebral blood flow , flow velocity , ultrasonic flow meter , cardiology , blood pressure , biomedical engineering , radiology , physics , astronomy , relaxation (psychology)
The correlation between the increase in velocity of blood flow in both the internal carotid and vertebral arteries during a carotid compression and the cerebrovascular resistance (CVR) was investigated in 11 patients with chronic ischemic cerebrovascular disease and 4 without organic brain lesions. The velocity of blood flow was measured by an ultrasonic Doppler flowmeter. CVR was calculated from cerebral blood flow and arterial blood pressure. There was no correlation between the increased velocity of blood flow in the internal carotid and vertebral arteries and CVR. The increased velocity of blood flow in patients with low CVR was, however, significantly higher than that of patients with high CVR. The investigation of cross-circulation by ultrasonic Doppler flowmetry is a useful non-invasive method for the detection of changes in cerebral vascular resistance.
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