Concomitant use of Impella while on peripheral veno-arterial extracorporeal membrane oxygenation: de-escalate and ambulate - Bertoldi, Letizia Fausta; Bertoglio, Luca; Pappalardo, Federico (Annals of Cardiothoracic Surgery; Vol 8, No 1 (January 01, 2019): Extracorporeal Life Support in Refractory Heart Failure, 2018)