The Breethe OXY-1 system (Abiomed, Danvers, Mass., USA) included a wearable pump-lung unit and a small gas-free roller console. A lighter pumplung unit with a smaller console, possibly placed in a backpack, is under development. RV-PA, Right ventricle to pulmonary artery. (Adopted from Griffith et al., 2021 [145]. Copyright, 2021 The Authors. Published by Elsevier Inc. on behalf of the American Association for Thoracic Surgery. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).)