ECPR can be defined as the implantation of veno-arterial extracorporeal membrane oxygenation (VA-ECMO) in a patient who experienced a sudden and unexpected pulseless condition attributable to cessation of cardiac mechanical activity. ECPR is now recognized in Extracorporeal Life Support Organization (ELSO) and American Heart Association (AHA) guidelines as a technique that can be considered in selected patients in cardiac arrest.
Many prospective or retrospective studies showed a superiority of ECPR on conventional CPR in increasing the odd of survival and of a good neurologic outcome.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5506168/