<unk>  can be achieved through cardiopulmonary resuscitation and defibrillation. Though<unk>  is necessary for survival, it is not, itself, a predictor of a favorable medium- or long-term outcome. Patients have died not long after their<unk>  has<unk> ed. One study showed that those who had suffered from an out-of-hospital cardiac arrest and had achieved<unk> , 38% of those people suffered a cardiac re-arrest before arriving at the hospital with an average time of 3 minutes to re-arrest. Patients with sustained<unk>  generally present with Post-Cardiac Arrest Syndrome (PCAS). Longer time-to-ROSC is associated with a worse presentation of PCAS. Lazarus phenomenon is the<unk> <unk>  of<unk>  after cardiopulmonary resuscitation attempts have stopped in someone with cardiac arrest. This phenomenon most frequently occurs within 10 minutes of cessation of resuscitation, thus passive monitoring is recommended for 10 minutes.
Return of spontaneous circulation
Collapsing pulse
Capillary refill
Permissive hypotension
Churchill–Cope reflex
Red reflex
Pulsus paradoxus
Obtundation