Silent heart burn means you are still refluxing but don't feel it.. It happens sometimes.
Anyway the purpose of an echo also is it will show the EF which is the ejection fraction of how much blood is being pumpe out by the heart and it can show if the heart is enlarged..
The best test to show pressures in the pulmonary artery are right heart caths where they actually go in there and measure the pressure. When I worked in the Cath lab we would do these often. A CFer certainly could get PH (pulmonary hypertenstion, but usually it does not come on all of a sudden and it isn't described as stabbing pains,
Could it be pluersy? Is the area where it hurts an area that is a normal area for you to hurt? Once I had a mucus plug it hurt so blasted bad I couldn't stand it, I was able to get it loose by CPT and that helped I don't know, to me, it sounds like some kind of thing directly related to the lung, as opposed to the heart, because you can have chest pain with pulmonary hypertension, like you said Jonathon you normally have edema and shortness of breath, Who knows, the body is a tricky little bugger and that is why it is best to go with your doctors who know you best... Either way, I hope you feel better.