The PCU nurse is sometimes also called a step-down nurse and the PCU is also known as cardiac stepdown, medical stepdown, neuro stepdown, surgical stepdown and ER holding. PCU nursing jobs traditionally operate between the levels of general and ICU care, and more recently, in the field of critical care, as well. Job Requirements : Minimum of 2 years of experience as a Tele, PCU or Stepdown RN Active BLS, ACLS Active RN license