The influence of time point of blood pressure measurement on the outcome in hemodialysis patients

The blood pressure (BP) behaviors of hemodialysis (HD) population presented a unique pattern much different from that of the general population. This pattern is composed of chronic BP burden over interdialytic period and acute BP fluctuation during dialysis sessions. Peridialysis, interdialysis, and intradialysis are three routinely used time points to capture this complex BP behavior. However, BP at each time point was measured in various forms and conveyed different prognostic information. The measurement and interpretation of the tide-like BP behavior in HD population posed great challenge. In this review, we focused on the prognostic information of the BP behavior at each time point in HD patients and further discussed the optimal measurement of this unique BP behavior to best capture the BP-outcome association.