In AF/AFL of 48 hrs or unknown duration undergoing cardioversion,
anticoagulation is recommended regardless of CHA2DS2-VASc score.
In AF/AFL of <48 hrs with CHA2DS2-VASc>2 in men and >3 in women undergoing cardioversion, anticoagulation is reasonable.
In AF/AFL of <48 hrs with CHA2DS2-VASc=0 in men and =1 in women undergoing cardioversion,
anticoagulation vs. no anticoagulation may be considered.
From Fin-CV registry, delay to cardioversion of
12 hours from symptom onset was
associated with a greater risk of thromboembodivc complications compared to cardioversion of
< 12 hours (1.1% versus 0.3%).