To the Editor: Accurate hand-off communication among health care providers has been a focus of quality improvement and hospital accreditation.1 Although much emphasis has been placed on in-hospital transfers of care, there is a growing focus on communication between emergency medical services and emergency department physicians.2,3 In Pennsylvania, state law mandates that required information collected in the field be filed as a patient care report that is incorporated into the chart,4 but rhythm strips from the field are neither mandated nor routinely included, since older models of automatic external defibrillators (AEDs) do not save or print out data. When . . .