Hi Gal, Welcome to healing well forum, we are glad to have you join us. Has your physician notified you that you should not have an MRI due to the PAV? Normally, if you have something implanted into your body that cant go through an MRI they will give you documentation on this and document your chart also. As for documentation on the wiring and valve I would have no idea, nor do I know if it can go through MRI. Just saying they would tell you if it couldnt.
Now, I will tell you regardless of what procedure you have had done most cardiac patients are very in-tune with their bodies. I dont know if I would say it is psychosomatic...there is quite a bit of anxiety involved granted but, who but us could know better how we feel and what is going on in our bodies? When your going through an MRI you have to remember that it is a HUGE magnetic field and often people do have some complaints of feeling odd, unable to breath, chest pressure, and this is not even people with heart problems.
I dont feel that I have answered your questions effectively here so I hope some other members come along and reply also. Please do let us know how your doing.