Right on the heels of the release of the 2025 AHA guidelines, including one on preferentially using IVs over IOs, comes two RCTs in the same edition of NEJM that compare intial attempts with IVs to IOs in out of hospital cardiac arrest. Dr Jarvis discusses these two papers while answer a listeners question, and tries to put this, and early epinephrine, into context. And he might throw in some commentary about the AHA's recommendations on mCPR and Heads Up CPR.Citations:1. Couper K, Ji C, Deakin CD, et al. A Randomized Trial of Drug Route in Out-of-Hospital Cardiac Arrest. N Engl J Med. 2025;392(4):336-348. doi:10.1056/NEJMoa24077802. Vallentin MF, Granfeldt A, Klitgaard TL, et al. Intraosseous or Intravenous Vascular Access for Out-of-Hospital Cardiac Arrest. N Engl J Med. 2025;392(4):349-360. doi:10.1056/NEJMoa2407616