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aortic dissections was the critical care unit in the majority (n = 12, 67%) of centres, with 5 centres preferring theatre (28%). There was agreement from respondents that guidelines regarding the transfer of acute Type A aortic dissection patients would be beneficial.Discussion: This survey of UK cardiac centres shows that the majority of centres already centralise treatment of Type A aortic dissection patients by sharing responsibilities. Furthermore, it reflects the observation by the majority of ACTACC link persons that there may be room for improvement of a timely diagnosis, transfer times, monitoring, and training and experience of escorting personnel. In the future a national prospective audit of acute Type A dissection cases in the UK will be necessary to further assess timely diagnoses and quality of transfer-related variables in individual patients with the view of elucidating how to potentially reduce the high incidence of pre-hospital deaths of patients with acute Type A aortic dissection. This survey was conducted before the COVID-19 pandemic. A future audit would help to assess NHS treatment of acute Type A aortic dissections after the pandemic peak.References: Mahase E. Half of patients with acute aortic dissection in England die before reaching a specialist centre. Brit Med J 2020; 368:m304.

important impact on mortality and morbidity after cardiac surgery: in the Euroscore2 renal function is appreciated by the glomerular filtration rate (GFR) calculated by Cockgroft and Could (CC), divided in 4 different categories. Recent studies suggested that different equation will predict more accurately postoperative AKI. The aim of this study was to evaluate if more recent ways to assess renal function (CKD-EPI, MDRD, Mayo-Clinic equation) or the simple preoperative creatinine level (SCr) would improve the accuracy of the euroscore2.Methods: We used data of a cohort using our prospective database from September 2012-Juin 2019 of patients undergoing cardiac surgery. We excluded emergent surgery and left heart assistance devices. GFR was calculated with the different equations. We then calculated the Euroscore2 without the weight of the GFR and used statistic regression to build 4 new Euroscore2 including the different GFR (CKD-EPI, MDRD, Mayo-Clinic equation) in a logistic regression as a continuous variable or creatinine level. The area under the ROC curve (AUC) for the to the different Euroscore2 to predicted mortality, for AKI and for hospital stay. AKI was classed with RIFLE criteria.

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