Graphical user interfaces for use with extracorporeal blood treatment systems may include a blood circuit pressure graphical element. The blood circuit pressure graphical element may include a venous portion and an arterial portion. The venous portion may depict, or include, a presently-monitored venous blood circuit pressure value and a graphical representation of previously-monitored venous blood circuit pressure values, and the arterial portion may depict, or include, a presently-monitored arterial blood circuit pressure value and a graphical representation of previously-monitored arterial blood circuit pressure values.