Anticoagulation for Atrial Fibrillation: Is This the End of Warfarin? Not Just Yet

Table 1

How the two most commonly used stroke risk scoring systems can be calculated: CHADS₂ has a maximum of six points and CHA₂DS₂-VASc a maximum of nine points, where the higher the number of points scored equates to higher thromboembolic risk.

CHADS2	Condition	Points allocated	CHA2DS2-VASc	Condition	Points allocated
C	Congestive heart failure or left ventricular (LV) dysfunction with ejection fraction (EF) ≤ 40%	1	C	Congestive heart failure or left ventricular (LV) dysfunction with ejection fraction (EF) ≤ 40%	1
H	Hypertension	1	H	Hypertension	1
A	Age ≥ 75	1	A2	Age ≥ 75	2
D	Diabetes	1	D	Diabetes	1
S2	Transient ischemic attack (TIA), stroke, or another thromboembolism	2	S2	Transient ischemic attack (TIA), stroke, or another thromboembolism	2
			V	Vascular disease (e.g., peripheral artery disease, myocardial infarction, aortic plaque)	1
			A	Age 65–74	1
			Sc	Sex category that is, female	1