Table 1

1990 ACR criteria for the classification of Takayasu arteritis15

A diagnosis of Takayasu arteritis requires that at least 3 of the 6 criteria are met.
Age at disease onset ≤40 yearsDevelopment of symptoms or findings related to Takayasu arteritis at age ≤40 years
Claudication of extremitiesDevelopment and worsening of fatigue and discomfort in muscles of 1 or more extremity while in use, especially the upper extremities
Decreased brachial artery pulseDecreased pulsation of 1 or both brachial arteries
Blood pressure difference >10 mm HgDifference of >10 mm Hg in systolic blood pressure between arms
Bruit over subclavian arteries or aortaBruit audible on auscultation over 1 or both subclavian arteries or abdominal aorta
Arteriogram abnormalityArteriographic narrowing or occlusion of the entire aorta, its primary branches, or large arteries in the proximal upper or lower extremities, not caused by arteriosclerosis, fibromuscular dysplasia, or similar causes; changes usually focal or segmental