Contributor:  Aaron Lessen, MD Educational Pearls: Refractory ventricular fibrillation, defined as 3 defibrillation shocks without resolution, was studied via RCT looking to compare ECMO with cardiac cath vs. typical resuscitation After 30 patients (15 each arm), the trial was stopped because such a significant benefit seen in the ECMO arm 6 patients survived and 3 had good neurological outcomes at 6 months with ECMO This is compared to 1 patient surviving initially and none surviving at 6 months in the typical resuscitation arm References Yannopoulos D, Bartos J, Raveendran G, et al. Advanced reperfusion strategies for patients with out-of-hospital cardiac arrest and refractory ventricular fibrillation (ARREST): a phase 2, single centre, open-label, randomised controlled trial. Lancet. 2020;396(10265):1807-1816. doi:10.1016/S0140-6736(20)32338-2 Summarized by John Spartz, MS4 | Edited by Erik Verzemnieks, MD   The Emergency Medical Minute is excited to announce that we are now offering AMA PRA Category 1 credits™ via online course modules. To access these and for more information, visit our website at www.emergencymedicalminute.com/cme-courses/ and create an account.  Donate to EMM today!