PMID- 33164057 OWN - NLM STAT- MEDLINE DCOM- 20210705 LR - 20210705 IS - 1569-9285 (Electronic) IS - 1569-9285 (Linking) VI - 31 IP - 6 DP - 2020 Dec 7 TI - Annexin V positive microvesicles are elevated and correlate with flow rate in patients receiving veno-arterial extracorporeal membrane oxygenation. PG - 884-891 LID - 10.1093/icvts/ivaa198 [doi] AB - OBJECTIVES: Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is used in critically ill patients requiring haemodynamic support. Microvesicles (MV) are released by activated blood cells acting as mediators of intercellular communication. We aimed to determine MV count and composition over time in patients with VA-ECMO and explore what drives MV formation. METHODS: VA-ECMO patients and healthy controls were recruited prospectively, and blood was taken at different time points (day 0, 1, 3 after ECMO placement and after explantation) for MV analysis. RESULTS: Annexin V positive MV were increased in patients (n = 14, mean age = 61.4 +/- 9.0 years, 11 males, 3 females) compared to healthy controls (n = 6, Annexin V positive MV count per millilitre day 1 versus healthy controls: 2.3 x 106 vs 1.3 x 105, P < 0.001). Furthermore, patients had higher proportions of endothelial and leukocyte MV [leukocyte MV day 1 versus healthy controls (%): 32.8 vs 17.5, P = 0.001; endothelial MV day 1 versus healthy controls (%): 10.5 vs 5.5, P = 0.01]. Annexin V positive and leucocyte MV correlated with the flow rate (r = 0.46, P = 0.01). CONCLUSIONS: Patients on VA-ECMO have increased levels of circulating MV and a changed MV composition. Our data support the hypothesis that MV release may be driven by higher flow rate and cellular activation in the extracorporeal circuit leading to poor outcomes in these patients. CLINICAL TRIAL REGISTRATION NUMBER: German Clinical Trials Register-ID: DRKS00011106. CI - (c) The Author(s) 2020. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved. FAU - Siegel, Patrick M AU - Siegel PM AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Hentschel, Dominik AU - Hentschel D AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Bojti, Istvan AU - Bojti I AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Wengenmayer, Tobias AU - Wengenmayer T AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Helbing, Thomas AU - Helbing T AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Moser, Martin AU - Moser M AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Duerschmied, Daniel AU - Duerschmied D AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Trummer, Georg AU - Trummer G AD - Department of Cardiovascular Surgery, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Bode, Christoph AU - Bode C AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. FAU - Diehl, Philipp AU - Diehl P AD - Department of Cardiology and Angiology I, Heart Center Freiburg University, Medical Faculty, University of Freiburg, Freiburg, Germany. LA - eng SI - DRKS/DRKS00011106 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Interact Cardiovasc Thorac Surg JT - Interactive cardiovascular and thoracic surgery JID - 101158399 RN - 0 (Annexin A5) RN - 0 (Biomarkers) SB - IM MH - Annexin A5/*blood MH - Biomarkers/blood MH - Critical Illness/*therapy MH - Extracorporeal Membrane Oxygenation/*methods MH - Female MH - *Health Status MH - Hemodynamics/*physiology MH - Humans MH - Male MH - Middle Aged OTO - NOTNLM OT - Critical care OT - Microvesicles Extracorporeal life support OT - Veno-arterial extracorporeal membrane oxygenation EDAT- 2020/11/10 06:00 MHDA- 2021/07/06 06:00 CRDT- 2020/11/09 05:36 PHST- 2020/03/25 00:00 [received] PHST- 2020/07/21 00:00 [revised] PHST- 2020/08/16 00:00 [accepted] PHST- 2020/11/10 06:00 [pubmed] PHST- 2021/07/06 06:00 [medline] PHST- 2020/11/09 05:36 [entrez] AID - 5961610 [pii] AID - 10.1093/icvts/ivaa198 [doi] PST - ppublish SO - Interact Cardiovasc Thorac Surg. 2020 Dec 7;31(6):884-891. doi: 10.1093/icvts/ivaa198.