The following are indicators of disease activity in Takayasu arteritis: Symptoms and signs: New systemic symptoms (eg, fever, fatigue, weight loss, anorexia, night sweats), symptoms suggesting vasculitis involving new arterial territories (eg, claudication), new bruits, and / or new changes in BP measurements Laboratory tests: Evidence of inflammation detected by blood tests (although markers of inflammation may be normal in active arteritis) Imaging studies: Development of stenosis or aneurysms in previously unaffected arteries (assessed with periodic imaging [usually magnetic resonance angiography]) However, Takayasu arteritis can progress silently even when clinical and laboratory studies suggest complete remission.