Prolonged disturbances of regional cerebral blood flow in transient ischemic attacks
Regional cerebral blood flow (rCBF) was measured over both hemispheres in 20 patients with unilateral transient ischemic attacks (TIA) of the territory of the internal carotid artery on the day of the TIA. rCBF was estimated with the nontraumatic Xenon 133-inhalation technique using the initial slope index. 13 patients experienced their first TIA, 7 had several attacks. In 14 patients the first rCBF-measurement was performed during the presentation of clinical symptoms. The 2nd rCBF-measurement was done on day 2, the last one on day 7. Scans of the 15 patients studied with CT were normal. On day 1 mean rCBF of the TIA-side was significantly lower than that of the contralateral hemispheres. 22% of all areas showed a significant reduction of flow compared to mean rCBF. Mean rCBF of both the TIA- and the contralateral side was significantly reduced compared to the bi-hemispheric mean rCBF of a control group with no history of TIA or completed strokes but at least 2 risk factors for cerebrovascular disease. Whereas mean rCBF did not change in the contralateral side it increased significantly (+6.9%) in the TIA-side from day 1 to day 2 but not from there to day 7. This is reflected by the increase of the total number of ROI with normal flow from day 1 to day 2. Considering the actual flow and the flow course of that tissue which was believed to be responsible for the clinical symptoms the following regional patterns were observed: normal rCBF in 6 patients; early return to normal concomitant to the clinical course (n = 4).
- Research Organization:
- Neurologische Univ.-Klinik, Bonn, Germany, F.R.
- OSTI ID:
- 5205458
- Journal Information:
- Stroke; (United States), Vol. 6
- Country of Publication:
- United States
- Language:
- English
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CEREBRUM
BLOOD FLOW
ISCHEMIA
DIAGNOSIS
INHALATION
PATIENTS
XENON 133
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BODY
BRAIN
CARDIOVASCULAR DISEASES
CENTRAL NERVOUS SYSTEM
DAYS LIVING RADIOISOTOPES
DISEASES
EVEN-ODD NUCLEI
INTAKE
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
NERVOUS SYSTEM
NUCLEI
ORGANS
RADIOISOTOPES
VASCULAR DISEASES
XENON ISOTOPES
550601* - Medicine- Unsealed Radionuclides in Diagnostics