Highlights•Continuous circulation check with Doppler ultrasound.•Detection of carotid blood velocity in a hypotension animal model.•Hands-free carotid Doppler detects circulation after defibrillation.•Detection of ROSC with hands-free Doppler ultrasound.•True-PEA identified with hands-free Doppler ultrasound.•Continuous circulation check with Doppler ultrasound.