Left Atrial Appendage Thrombus Formation Despite Continuous Non-Vitamin K Antagonist Oral Anticoagulant Therapy in Atrial Fibrillation Patients Undergoing Electrical Cardioversion or Catheter Ablation: A Comparison of Dabigatran and Rivaroxaban

Table 1

Scales applied to estimate the risk of thromboembolic complications in patients with AF.

Risk factors	Scales
	CHADS2 (maximum score 6)	R2CHADS2 (maximum score 8)	CHA2DS2-VASc (maximum score 9)	CHA2DS2-VASc-RAF (maximum score 21)
Congestive heart failure	1	1	1	1
Hypertension	1	1	1	1
Diabetes mellitus	1	1	1	1
Vascular disease	—	—	1	1
Age 65–74 years	—	—	1	1
Stroke or transient ischaemic attack	2	2	2	2
Age ≥75 years	1	1	2	2
Female sex	—	—	1	1
Creatinine clearance <60 mL/min	—	2	—	—
eGFR <56 mL/min/1.73 m^2	—	—	—	2
Persistent AF	—	—	—	4
Permanent AF	—	—	—	10
Risk categories
Low	0	0	0 points in men,	0–4 points in men,
			1 point in women	1–5 points in women
Intermediate	1	1	1 point in men,	—
			2 points in women
High	2	2	≥ 2 points in men,	≥ 5 points in men,
			≥ 3 points in women	≥ 6 points in women

AF, atrial fibrillation; eGFR, estimated glomerular filtration rate.