what is CHADS2 Score? Importance of the score.

CHADS2 score helps in assessment of risk of STROKE IN  AF

Mnemonic stands for
C- CHF (1*)
H- HTN(1*)
A- Age > 35yrs(1*)
D- DM(1*)
S2- H/O Stroke or  TIA(2*)

Score >2 (CVA risk >5%) Rx Warfarin
Score >1 (CVA risk >4%) Rx Warfarin or Aspirin
Score 0 Rx Aspirin
 * point