It is well established that the stroke risk in AF comes from blood pooling in the left atrium appendage. Depending what, if any, comorbidities you may have there is a risk that a clot may form. What I'm wondering, is whether the type of AF you have affects this blood pooling and so are different types of AF more 'risky' than others? If one does not suffer giddiness, light headedness, etc, it seems to imply one's blood is still circulating okay. Does that lessen the impact of the blood pooling in the LAA. Just wondering because it could be yet another consideration when making a decision on anti coags.