MDCalc

Indian Takayasu Clinical Activity Score (ITAS2010)

Differentiates between active and inactive disease in Takayasu arteritis (TAK).

Select a feature only if the abnormality is new (or worsening) within the past 3 months AND ascribed to current active vasculitis.

Systemic

Malaise or weight loss >2 kg
Myalgia, arthralgia, or arthritis
Headache

Abdominal

Severe abdominal pain
Pain presenting as an emergency with features of bowel ischemia, best confirmed by imaging or surgery

Genitourinary

Recent history of spontaneous abortion
Spontaneous fetal loss within 12 weeks

Renal

Systolic BP >140
Diastolic BP >90

Neurological

Stroke
Seizures (not hypertensive)
Syncope
Vertigo/dizziness

Cardiovascular

Bruits
If present, may select location of bruits to improve diagnosis
Pulse inequality
Feeble pulse on one side as compared to same pulse on opposite limb
New loss of pulses
If yes, may select location of pulse loss to improve diagnosis
Claudication
If present, may select location of claudication to improve diagnosis
Carotidodynia
Aortic incompetence
Detected clinically or by echocardiogram
Myocardial infarct/angina
Cardiomyopathy/cardiac failure

Result:

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Advice
  • This tool is not intended to replace good clinical judgment and specialist expertise.
  • Use as part of a comprehensive evaluation (e.g., physical examination, laboratory data, imaging studies) to guide treatment decisions and monitoring.
Management

The following cutoffs are based on the original study by Misra et al. (2013):

  • Inactive disease (score <2): Consider tapering immunosuppressive therapy cautiously.
  • Active disease (score ≥2): 
    • Consider intensifying treatment with corticosteroids, additional immunosuppressants, and/or biologic therapy.
    • Evaluate treatment adherence and exclude other conditions that may mimic disease activity.
    • Persistent elevation despite treatment may warrant vascular imaging to assess progression and rule out complications.