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CHAD Score
Aka: CHAD Score, CHADS Score, CHADS2
- See Also
- CHADS2-VASc Score
- Atrial Fibrillation Anticoagulation
- Outpatient Bleeding Risk Index
- HAS-BLED Score
- Indication
- Assess Risk of stroke with Atrial Fibrillation
- Contraindications: Conditions that if present may trump the decision to anticoagulate
- Valvular heart disease
- Prior peripheral embolism
- Intracardiac thrombus
- Hyperthyroidism
- Criteria: Mnemonic = CHADS
- Congestive Heart Failure (1 point)
- Relative Risk of Stroke or TIA: 1.4
- Hypertension (1 point)
- Relative Risk of Stroke or TIA: 1.6
- Age over 75 years (1 point)
- Relative Risk of Stroke or TIA: 1.4
- Diabetes Mellitus (1 point)
- Relative Risk of Stroke or TIA: 1.7
- Stroke or TIA history (2 points)
- Mitral Stenosis or Prosthetic Heart Valve carry similar risk and also indicate Warfarin
- Relative Risk of Stroke or TIA: 2.5
- Disadvantages
- Does not account for atrial enlargement (higher risk of CVA)
- CHADS2-VASc Score is preferred over CHADS2 due to its greater efficacy
- Interpretation
- CHADS Score >2 (CVA risk >5% per year): Warfarin with goal INR 2.0 to 3.0
- CHADS Score 1 (CVA risk >4% per year): Warfarin or Aspirin
- CHADS Score 0: Aspirin 81 to 325 mg daily
- References
- Gage (2004) Circulation 110:2287-92 [PubMed]