Los Angeles County Paramedic Accreditation Practice Test

The return of spontaneous circulation (ROSC) is identified when a patient exhibits a detectable pulse after cardiopulmonary resuscitation (CPR) has been performed. This is a critical sign indicating that the heart has resumed its natural rhythm and is now effectively pumping blood throughout the body again. ROSC is a significant milestone in the management of a patient who has experienced cardiac arrest, as it suggests that the immediate resuscitative efforts have been successful in restoring circulation.

While regaining consciousness, starting to breathe autonomously, or responding verbally can be indicative of a positive prognosis and recovery, none of these signs definitively indicate that circulation has returned. The presence of a pulse specifically demonstrates the resumption of hemodynamic stability, which is essential for further evaluation and potential treatment measures to ensure that the patient continues to improve.