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CHA₂DS₂VASc is a modified version of CHADS₂, a scoring system used for estimating ischaemic stroke risk in patients with atrial fibrillation.
- 0: no prophylaxis / aspirin (0.2% risk)
- 1: aspirin / warfarin (0.6% risk)
- ≥2: warfarin (>3% risk)
References
Friberg L, Rosenqvist M, Lip GY. Evaluation of risk stratification schemes for ischaemic stroke and bleeding in 182 678 patients with atrial fibrillation: the Swedish Atrial Fibrillation cohort study. European Heart Journal. 2012 Jun; 33 (12): 1500-1510.Writing Group for the Christopher Study Investigators. Effectiveness of Managing Suspected Pulmonary Embolism Using an Algorithm Combining Clinical Probability, D-Dimer Testing, and Computed Tomography. JAMA. 2006;295(2):172-179.