Table 1. Criteria for Oral Anticoagulation Initiation and Interruption in the IMPACT Study.

ARHE = Atrial high rate episode, TIA = Transient ischemic attack

	Initiation Criteria	Interruption Criteria
	AHRE Duration (over 48 consecutive hours)	Consecutive days free from AHRE
CHADS2 Score
1 and 2	48 hours	30 days
3 and 4	24 hours	90 days
5 and 6 or any prior stroke/TIA	≤12 hours	Do not discontinue