My 15 year old son had an ASD closure 6 weeks ago through catheter and has an Amplatzer device. 2 actually.. he had 2 big holes and several small holes (he has a 24mm and a 22mm device) He is taking 81mg aspirin daily. For the past 2 weeks he has been getting one sided headaches almost daily. He has been seen by ER doctors and by his cardiologist . They think it s no big deal and say they may be migraines, BUT he never got migraines before the procedure so I don t think that s what it is. I am starting to worry. His vision changes, gets dizzy, one sided head pain, and pain gets worse when he looks down or lays on stomach. What could be going on?