I have "asbestosis of the lungs", courtesy of my time in the Navy as a "BT". Anyway.............long story short, it affects my heart as well. I had the exact same procedure in Aug. and the worst part of it is lying immobile after it's over for the required 6 hours. I had the same feeling of doom & facing my possible death. As it turned out, that was a good thing. Gave me some insight as to how that really feels, and made my faith stronger than it was before. Also, made me appreciate more the things in life that are REALLY important. Try to approach it as just another trial of life, and look forward to "when it's over". A little fear & stress is normal, but too much will only complicate the issue. Best of luck, and may the Good Lord bless you.