Altered cerebral hemodynamics and metabolism in Takayasu's arteritis with neurological deficits.
OBJECTIVE
Takayasu's arteritis is a nonspecific arteritis involving major cerebral arteries. The aim of our study is to examine cerebral hemodynamics and metabolism in Takayasu's arteritis with neurologic symptoms.


METHODS
We measured cerebral blood flow and metabolism using positron emission tomography in seven patients (14 to 59 years of age) with Takayasu's arteritis who developed transient ischemic attacks (2 patients), ischemic stroke (4) or putaminal hemorrhage with multiple brain infarction (1).


RESULTS
All patients had severe stenosis or occlusion of one or more major cerebral arteries. There were no significant differences in the values of cerebral blood flow, oxygen extraction fraction, and cerebral blood volume in the infarcted and noninfarcted hemisphere. By contrast, the value of cerebral metabolic rate for oxygen in the infarcted hemisphere was markedly reduced (1.87 mL/100 mL per minute, P < .01) compared with controls. Mean transit time in the infarcted hemisphere was significantly greater than in the noninfarcted one, both in patients and controls (P < .01 and P < .05, respectively).


CONCLUSIONS
Collateral blood flow to the hemisphere without brain damage may be relatively well developed in Takayasu's arteritis, although hemodynamic reserve as well as oxygen metabolism were impaired in the infarcted hemisphere with ischemic lesions.
Takano
K
K
Second Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Sadoshima
S
S
Ibayashi
S
S
Ichiya
Y
Y
Fujishima
M
M
D000293:Adolescent; D000328:Adult; D001013:Aorta, Thoracic / Q000033:anatomy & histology / Q000473:pathology; D001794:Blood Pressure; D002245:Carbon Dioxide / Q000097:blood; D002544:Cerebral Infarction / Q000150:complications / Q000378:metabolism / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D005260:Female; D006439:Hemodynamics; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D013625:Takayasu Arteritis / Q000000981:diagnostic imaging / Q000378:metabolism / Q000503:physiopathology*; D014055:Tomography, Emission-Computed
D006454:Hemoglobins; D002245:Carbon Dioxide; D010100:Oxygen