The Risk: Clotting

To identify atrial fibrillation patients at risk for stroke, five randomized stroke prevention trials in patients with non-valvular AF were conducted. Investigators pooled the data from these five prevention trials in an attempt to develop a stronger risk stratification scheme. The resulting CHADS2 scoring system, is currently the most widely used clinical model for estimation of stroke risk in AF. Though it does have some limitations, the main advantage of the CHADS2 scoring system compared to other risk models is its simplicity.

CHADS2 is an acronym created from the first letter of five clinical parameters (1 point for each and 2 points for stroke)*

  • Congestive heart failure
  • Hypertension
  • Age
  • Diabetes
  • Stroke

Annual risk of Ischemic Stroke*

  • Score 1 – 2.8%
  • Score 2 – 4.0%
  • Score 3 – 5.9%
  • Score 4 – 8.5%
  • Score 5 – 12.5%
  • Score 6 – 18.2%

Risk Scoring*

  • Low risk – 0-1
  • Medium risk – 2
  • High risk – 3-6
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Structural Heart Solutions

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