- Prone to IDH, defined as IDH occurring in >10% of treatments in the past 3 months. IDH will be defined as symptoms (e.g. cramps, dizziness, loss of consciousness) and/or intra- or post-dialytic systolic BP <90 mm Hg and/or use of intervention(s) (UF goal lowered, treatment stopped early, or saline given) because of IDH