You might want to ask your doctor about taking enteric coated aspirin. Sometimes aspirin can give you stomach problems and some doctors are ok with patients taking enteric coated tabs to prevent that.
All aspirin is is a safety net for people even those w/out heart probs. When people take one a day it just thins the blood to lessen the chance of throwing a clot. Travelers who fly alot take them because they are sitting for long periods of time on planes, people who go on long road trips, etc. because your circulation is changed from the norm....just like your arrthythmia when they converted your heart they are just tossing you a safety vest for your own good....i've been taking one a day for years w. no probs. and i like that alot better than a blood thinner idea believe me. The doc has your best interest at heart and you can now buy aspirin with little hearts on the front of the packaging telling that it is exactly what its meant for. How easy is that? Pro athletes take them among millions of other people why not take something that is a preventative???? Good luck and happy new year......
I assume the "arrhythmia" was atrial fibrillation.
An aspirin regiment to protect against blood clot formation is the lowest level of protection we have, albeit a half or reduced dose would be less than a standard aspirin, which I believe is usually 325 mg.
The answer is for life, or until your stomach can no longer stand the aspirin. Then you'll have to go to an anticoagulant... I forecast that will eventually happen anyway. AFigb conversion is always temporary. The question is when will you go back into AFib, not if. Taking an aspirin you are prepared for even a short period of AFib that might occure while you are asleep and don't even know it happens.