TITLE

Antiaggregative Aspirin Dosage at the Affected Vessel Wall

AUTHOR(S)
Numano, Fujio; Maruyama, Yoshiaki; Koyama, Tadayoshi; Numano, Fujie
PUB. DATE
October 1986
SOURCE
Angiology;Oct1986, Vol. 37 Issue 10, p695
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The present study, using patients with Takayasu's disease (pulseless disease), characterized by segmentally affected arterial lesions and stenotic conditions with a nonspecific inflammatory morbid condition, was designed to assess whether or not a low dose of aspirin can practically exert its preventive effect against the aggregation of platelets that have just passed along a rough-surfaced arterial wall. Twenty Japanese women with Takayasu's disease were selected under the following criteria: (1) A unilateral upper extremity was angiographically confirmed to be affected with the disease, while the contralateral limb was almost normal. (2) Systolic blood pressure on the affected side was almost half that on the nonaffected side. (3) The patients showed neither a positive CRP nor an accentuated ESR. In these patients, mean plasma levels of TXB and 3 μM ADP-induced platelet aggregation in blood obtained from the affected side were 156.5± 17.7 pg/mI, and 59.5 ±6.0%, respectively, which were significantly high as compared with 104.5±17.6 and 41.7±8.8%, respectively, in samples from the nonaffected side. Forty and eighty mg of aspirin per day administered to two randomly composed groups, respectively, showed an improvement in platelet aggregability and TXB levels on the nonaffected side. In the affected limbs, though 81) mg/day led to significant decreases in TXB levels (108.0±7.8 pg/mI, p <0.05) and platelet aggregability (21 .3±7.6%), the 40-mg regimen showed no significant reductions (134.6±9.4 pg/ml, 35.6±17.1%). Plasma levels of 6-keto PGF1α revealed no differences between 40- and 80-mg regimens, or between before and after treatment. These data suggest that a dosage of 80 mg of aspirin per day is effective for long-term treatment in preventing thrombus formation in surface-damaged blood vessels.
ACCESSION #
16479061

 

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