How long does it take for a blood clot to form during paroxysmal atrial fibrillation?

Answer 1

I suspect you are wondering about anticoagulation therapy (taking Coumadin aka Warfarin). Although I am not sure anyone knows for certain, it is probably a fair guess to assume that a clot could form as quickly as blood would clot under other circumstances - 10 to 13 seconds. The primary mechanism is due to blood pooling, so the actual time is probably somewhat more than a simple prothrobin time.

With anticoagulation the amount of time before clotting is significantly extended. Study after study has demonstrated that the risk for stroke is about seven percent per year for those with AFib over age 65. With anticoagulation the risk is less than two percent per year. The clear indication is less pronounced for those under age 65, but PAF is more of a concern than straight Afib for potential stroke risk and for needing anticoagulation treatment.

I hope this helped. Good luck

Answer 2

I don't know that this ever causes a blood clot. I certainly don't think it has to, though you shouldn't stand on your head during an attack.