The importance of timing in postcardiotomy venoarterial extracorporeal membrane oxygenation: A descriptive multicenter observational study

Mariani, Silvia ; Wang, I-wen ; van Bussel, Bas C.T. ; Heuts, Samuel

; Wiedemann, Dominik ; Saeed, Diyar ; van der Horst, Iwan C.C. ; Pozzi, Matteo ; Loforte, Antonio

; Boeken, Udo ; Samalavicius, Robertas ; Bounader, Karl ; Hou, Xiaotong ; Bunge, Jeroen J.H. ; Buscher, Hergen ; Salazar, Leonardo ; Meyns, Bart ; Herr, Daniel ; Matteucci, Sacha ; Sponga, Sandro ; Ramanathan, Kollengode ; Russo, Claudio ; Formica, Francesco ; Sakiyalak, Pranya ; Fiore, Antonio

; Camboni, Daniele ; Raffa, Giuseppe Maria ; Diaz, Rodrigo ; Jung, Jae-Seung

; Belohlavek, Jan ; Pellegrino, Vin ; Bianchi, Giacomo

; Pettinari, Matteo ; Barbone, Alessandro

; Garcia, José P. ; Shekar, Kiran ; Whitman, Glenn ; Lorusso, Roberto ; Ravaux, Justine ; Schaefer, Ann-Kristin ; Conci, Luca ; Szalkiewicz, Philipp ; Khalil, Jawad ; Lehmann, Sven ; Obadia, Jean-Francois ; Kalampokas, Nikolaos ; Flecher, Erwan ; Miranda, Dinis Dos Reis ; Sriranjan, Kogulan ; Mazzeffi, Michael A. ; Vedadi, Nazli ; Di Eusanio, Marco ; MacLaren, Graeme ; Sorokin, Vitaly ; Costetti, Alessandro ; Schmid, Chistof ; Castillo, Roberto ; Mikulenka, Vladimir ; Solinas, Marco

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Objectives: Postcardiotomy extracorporeal membrane oxygenation (ECMO) can be initiated intraoperatively or postoperatively based on indications, settings, patient profile, and conditions. The topic of implantation timing only recently gained attention from the clinical community. We compare patient characteristics as well as in-hospital and long-term survival between intraoperative and postoperative ECMO. Methods: The retrospective, multicenter, observational Postcardiotomy Extracorporeal Life Support (PELS-1) study includes adults who required ECMO due to post-cardiotomy shock between 2000 and 2020. We compared patients who received ECMO in the operating theater (intraoperative) with those in the intensive care unit (postoperative) on in-hospital and postdischarge outcomes. Results: We studied 2003 patients (women: 41.1%; median age: 65 years; interquartile range [IQR], 55.0-72.0). Intraoperative ECMO patients (n = 1287) compared with postoperative ECMO patients (n = 716) had worse preoperative risk profiles. Cardiogenic shock (45.3%), right ventricular failure (15.9%), and cardiac arrest (14.3%) were the main indications for postoperative ECMO initiation, with cannulation occurring after (median) 1 day (IQR, 1-3 days). Compared with intraoperative application, patients who received postoperative ECMO showed more complications, cardiac re-operations (intraoperative: 19.7%; postoperative: 24.8%, P = .011), percutaneous coronary interventions (intraoperative: 1.8%; postoperative: 3.6%, P = .026), and had greater in-hospital mortality (intraoperative: 57.5%; postoperative: 64.5%, P = .002). Among hospital survivors, ECMO duration was shorter after intraoperative ECMO (median, 104; IQR, 67.8-164.2 hours) compared with postoperative ECMO (median, 139.7; IQR, 95.8-192 hours, P < .001), whereas postdischarge long-term survival was similar between the 2 groups (P = .86). Conclusions: Intraoperative and postoperative ECMO implantations are associated with different patient characteristics and outcomes, with greater complications and in-hospital mortality after postoperative ECMO. Strategies to identify the optimal location and timing of postcardiotomy ECMO in relation to specific patient characteristics are warranted to optimize in-hospital outcomes.

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