Return of spontaneous circulation
Encyclopedia
Return of spontaneous circulation (ROSC) is resumption of sustained perfusing cardiac activity associated with significant respiratory effort after cardiac arrest
Cardiac arrest
Cardiac arrest, is the cessation of normal circulation of the blood due to failure of the heart to contract effectively...

. Signs of ROSC include breathing, coughing, or movement and a palpable pulse or a measurable blood pressure. Cardiopulmonary resuscitation
Cardiopulmonary resuscitation
Cardiopulmonary resuscitation is an emergency procedure which is performed in an effort to manually preserve intact brain function until further measures are taken to restore spontaneous blood circulation and breathing in a person in cardiac arrest. It is indicated in those who are unresponsive...

 and defibrillation increase the chances of ROSC.

Lazarus phenomenon or autoresuscitation after failed cardiopulmonary resuscitation is the spontaneous return of circulation after resuscitation attempts have stopped in someone with cardiac arrest
Cardiac arrest
Cardiac arrest, is the cessation of normal circulation of the blood due to failure of the heart to contract effectively...

. Thus passive monitoring is recommended for 10 minutes after resuscitation attempts have stopped.
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