Well , neither did I until yesterday . I researched this on Wikipedia a little while ago . They insert a wire into the artery , and test the pressure before the restricted spot , and then after the spot , to get a more accurate result of the % of blockage , to help determine the proper course of treatment . In my particular case ; It will help determine if I stay on the medicines that I am taking , or opt for bypass surgery .

I had lots....no big deal.I was born with corrected transposition of the great vessel.So my life.
.

so what did they decide? hopping you got to stay on the meds.

I never heard of it.