My cardiac doctors want to do an MRI. I have had a renal transplant which thankfully is still working even though it has a few stones in it and the function has dipped slightly from when it was done (2000). The MRI requires a contrast dye which is a known kidney toxin and can cause renal failure in anything but the best functioning kidney. I cannot seem to get them to accept how scared I am of risking it. The cardiac team are dismissive of my worries and aren'rt offering me the scan without the dye even though that is possible. They have said it is purely for their information and will have no effect on the path of my illness or treatment. I just don't want to risk it and they are getting very p'd off with me and say I am over reacting even though they can't deny the stats and are unable to reassure me.