I had a chest catheter put in for dialysis, as I m in renal failure. When they put the cath in, it caused a heart arrhythmia, and my heart started racing up to 124 beats per minute. Dialysis nurses are not concerned, but it s been over a week, and it is still racing. What can I do to fix it? All they can tell me is everyone is different, and if I m concerned, go to the ER.