[Ultrasound diagnosis of cerebral vascular disease--supplementary presentation with special reference to intracranial vessels].
This study was carried out on patients with chronic cerebral vascular disease (CVD) to determine to what extent the intracranial vascular morphology and intracranial hemodynamics can be estimated from the common carotid artery blood flow (CF) and middle cerebral artery blood flow velocity (MV) determined by the ultrasound Doppler method. TCCAD (transcranial Doppler with computer aided design) was obtained based on MV information and its clinical implications were assessed. CF was 4.88 +/- 0.96 ml/sec for the patients with complete occlusion of the internal carotid artery or middle cerebral artery. MV ranged form 40 to 100 cm/sec and CF was 6.5 ml/sec or more for the majority of patients whose cerebral angiographic findings were unremarkable. In patients with complete occlusion of the internal carotid artery, however, MV was increased, while CF was decreased. It is clear from these results that the MV measurement was taken of blood flow increasing contralaterally to the direction of blood flow. Based on TCCAD, the vascular course of the middle cerebral artery M1 portion was classified into basilar, straight, and dorsal types in CVD patients. The frequency of the dorsal type was 0 and the proportion of the basilar type was significantly increased in patients under 50 years of age. These findings suggest that cerebral arteriosclersis progresses fast in CVD patients under 50.
Yoneyama
K
K
Second Department of Internal Medicine, St. Marianna University School of Medicine.
Saito
K
K
Sugihara
H
H
D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D002536:Cerebral Arteries / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002908:Chronic Disease; D006801:Humans; D008875:Middle Aged; D014463:Ultrasonography