Asd closure after retinal artery branch occlusion. post procedure = palpitations that felt very irregular. after 6 weeks it improved. my dr thinks i may be in af. is it possible that af was transient?

Yes: We have what is called paroxysmal atrial fibrillation and they are more concerning as if not found and diagnosed, they can also cause embolic strokes.

A fib: Yes. It is possible in case of paroxysmal atrial fibrillation, which is episodic. As you have mitral regurgitation, you are at risk for having atrial fibrillation. As you are already on Aspirin and Plavix (clopidogrel) i don't recommend warfarin which increases bleeding risks. I suggest you to get holter and event monitor to record arrhythmias to get appropriate antiarrythmic therapy.