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Out-of-hospital cardiac arrest is a leading cause of mortality with survival rates of less than 10%. In selected patients, survival may be improved via timely application of extracorporeal cardiopulmonary resuscitation (ECPR). However, ECPR is a complex and resource intensive intervention with a high risk of complications that impair widespread clinical adoption. This study employed a mixed approach of qualitative interview analysis embedded with quantitative data collection to uncover the major hurdles faced by clinicians during ECPR initiation. We conducted semi-structured interviews with eight ECPR intensive care specialists with 2–10 years of experience working at a large, tertiary ECPR center in Australia. Clinicians identified dilation as the most time-consuming step, followed by draping, and decision-making during extracorporeal membrane oxygenation patient selection. The most challenging step was the decision-making for patient selection, followed by dilation and imaging. These findings uncovered key barriers to ECPR, and identified priority areas for further research and clinical training. Major logistical hindrances will require well-defined protocols and improved clinical training. Engineering innovations in the identified areas may improve the delivery of ECPR, making it simpler and faster to deliver.