Hi there -
The likely reason you were prescribed naproxyn for the
chest pain is that the ER staff suspected mild pericarditis (or
pleurisy -- the
pain and the treatment is the same). Usually with pericarditis the
pain is aggravated by breathing and by lying flat on one's back, and is often relieved by sitting up and/or leaning forward; Also there may even have been some slight suggestion in the
EKG (which I assume they did). Sometimes it doesn't respond to naproxyn, and assuming that's what they were thinking, when it doesn't, then the next step is usually steroids.
It's very rare for a
VSD to cause this sort of symptom unless there's been some wholesale change, which is also very rare.
Apparently the ER visit didn't do what you needed it to do, which was to find a way to resolve the
pain. For this reason, while you would appear to be OK in that there's no emergent problem, you still have this disruptive
pain, so you might need to make an appointment with a doctor who will take the time to sort this out and prescribe something that will actually manage the
pain til the problem resolves. It really does sound like pericarditis, which can be caused by a lot of things, but most often is due to a recent viral infection.
I hope this is helpful. Please follow up with us as needed. Good luck to you.