Cardiovascular Medicine Book

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CHAD ScoreAka: CHADS Score, CHADS2

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  1. Indication
    1. Assess Risk of stroke with Atrial Fibrillation
  2. Criteria (mneumonic: CHADS)
    1. Congestive Heart Failure (1 point)
      1. Relative risk of Stroke or TIA: 1.4
    2. Hypertension (1 point)
      1. Relative risk of Stroke or TIA: 1.6
    3. Age over 75 years (1 point)
      1. Relative risk of Stroke or TIA: 1.4
    4. Diabetes Mellitus (1 point)
      1. Relative risk of Stroke or TIA: 1.7
    5. Stroke or TIA history (2 points)
      1. Mitral Stenosis or prosthetic heart valve carry similar risk and also indicate Warfarin
      2. Relative risk of Stroke or TIA: 2.5
  3. Interpretation
    1. CHADS Score >2 (CVA risk >5% per year): Warfarin with goal INR 2.0 to 3.0
    2. CHADS Score >1 (CVA risk >4% per year): Warfarin or Aspirin
    3. CHADS Score 0: Aspirin 81 to 325 mg daily
  4. References
    1. Gage (2004) Circulation 110:2287

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