Silva, Doroteia2021-05-212021-05-212021Rev Port Cardiol. 2021 May;40(5):327-3280870-2551http://hdl.handle.net/10451/48086© 2021 Sociedade Portuguesa de Cardiologia. Published by Elsevier España, S.L.U. This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)Mortality after cardiac arrest (CA) remains very high despite advances in advanced life support (ALS) and post-resuscitation care. CA is usually divided into two categories: out-of-hospital (OHCA) and in-hospital (IHCA) cardiac arrest. Survival rates at hospital discharge vary considerably between studies and regions, but major studies report rates of 15% for IHCA and 9% for OHCA in Europe.engjournal article10.1016/j.repc.2021.03.0042174-2030