Doppler ultrasound peak systolic velocity versus end tidal carbon dioxide during pulse checks in cardiac arrest

Hands-free continuous carotid Doppler ultrasound for detection of the pulse during cardiac arrest in a porcine model

“…Since invasive blood pressure seldom is used during cardiac arrest, a surrogate marker for ROSC is used, such as end-tidal carbon dioxide (ETCO2). 1 , 8 , 9 However, the accuracy of ETCO2 is influenced by, e.g. ventilation and medications.…”