Funding Acknowledgements Type of funding sources: None. Background Despite the increase of extracorporeal membrane oxygenation (ECMO) employment around the globe over the last decades, studies describing the emergency use of venoarterial (VA)-ECMO in the cardiac catheterization laboratory (CCL) are scarce. Purpose The aim of this study was to describe the patient population that received ECMO in the CCL of a tertiary care center and the associated complications and outcomes. Methods In this single-center retrospective study we reviewed the baseline clinical and laboratory characteristics, indications and outcomes of adult patients, who received VA-ECMO between 2011 and 2019. Results In the given time period, ECMO use in the CCL increased drastically. Mean age of the 83 patients was 58.3 ± 12.5 years, 78.3% were male. From 2011 to 2018 ECMO-use in the CCL increased drastically. The most common indication for ECMO implantation was cardiac arrest (66%), followed by cardiogenic shock (12%), high-risk PCI (11%), and procedure-related complications (10%). While 30-day mortality in the total study population was 69%, it varied greatly depending on the underlying indication for ECMO therapy (cardiac arrest 78%, cardiogenic shock 20%, high-risk PCI 44%, procedure-related complications 88%). The most commonly occurring complications were acute kidney injury (20%) and cannula site bleeding (20%), followed by extremity complications (19%), sepsis (18%), major bleeding (10%) and stroke (8%). Of interest, patients receiving ECMO therapy after in-hospital cardiac arrest showed greater survival rates (28.2%) as compared to patients after out of hospital cardiac arrest (18.2%; p=0.045). High serum lactate levels (p=0.018) and low baseline pH values (p=0.001) at baseline were associated with a significantly increased 30-day mortality after ECMO implantation. Conclusion The emergency use of VA-ECMO in the CCL increased over the last years and was associated with a high 30-day mortality in our study population. Still, a >20% survival rate in the group of patients with refractory cardiac arrest, an otherwise futile situation, suggests that VA-ECMO implantation is reasonable in selected patients. As high admission serum lactate levels and the baseline pH are strong predictors of outcome, such parameters may be used to guide decision making.
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