M. Pierri, F. Capestro, and C. Zingaro, Risk factors and outcome in European cardiac surgery : analysis of the EuroSCORE multinational database of 19030 patients European system for cardiac operative risk evaluation (EuroSCORE) Multicenter validation of a risk index for mortality, intensive care unit stay, and overall hospital length of stay after cardiac surgery A Method of Uniform Stratification of Risk for Evaluating the Results of Surgery in Acquired Adult Heart Disease The EuroSCORE Study Group. Does EuroSCORE work in individual European countries? Application of the Parsonnet scoring system for a Canadian cardiac surgery program, I3?12. (6) Roques F Risk stratification analysis of operative mortality in heart and thoracic aorta surgery: comparison be? tween Parsonnet and EuroSCORE additive model, pp.816-838, 1989.

H. Geissler, P. Hölzl, S. Marohl, F. Kuhn?régnier, U. Mehlhorn et al., Risk stratification in heart surgery: comparison of six score systems, European Journal of Cardio-Thoracic Surgery, vol.17, issue.4, pp.400-406, 2000.
DOI : 10.1016/S1010-7940(00)00385-7

A. Gogbashian, A. Sedrakyan, and T. Treasure, EuroSCORE: a systematic review of international performance, European Journal of Cardio-Thoracic Surgery, vol.25, issue.5, pp.695-700, 2004.
DOI : 10.1016/j.ejcts.2004.02.022

C. Yap, C. Reid, M. Yii, M. Rowland, M. Mohajeri et al., Validation of the EuroSCORE model in Australia???, European Journal of Cardio-Thoracic Surgery, vol.29, issue.4, pp.441-447, 2006.
DOI : 10.1016/j.ejcts.2005.12.046

K. Engebretsen, C. Friis, and L. Sandvik, Survival after CABG ??? better than predicted by EuroSCORE and equal to the general population, Scandinavian Cardiovascular Journal, vol.34, issue.2, pp.123-128, 2009.
DOI : 10.1080/14017430701305436

J. Gummert, A. Funkat, and B. Osswald, EuroSCORE overestimates the risk of cardiac surgery: results from the national registry of the German Society of Thoracic and Cardiovascular Surgery, Clinical Research in Cardiology, vol.26, issue.6, pp.363-369, 2009.
DOI : 10.1007/s00392-009-0010-8

J. Nissinen, F. Biancari, and J. Wistbacka, Is it possible to improve the accuracy of EuroSCORE?, European Journal of Cardio-Thoracic Surgery, vol.36, issue.5, pp.799-804, 2009.
DOI : 10.1016/j.ejcts.2009.03.069

B. Osswald, V. Gegouskov, and D. Badowski?zyla, Overestimation of aortic valve replacement risk by EuroSCORE: implications for percutaneous valve replacement, European Heart Journal, vol.30, issue.1, pp.74-80, 2009.
DOI : 10.1093/eurheartj/ehn523

A. Parolari, L. Pesce, and M. Trezzi, EuroSCORE Performance in Valve Surgery: A Meta-Analysis, The Annals of Thoracic Surgery, vol.89, issue.3, pp.787-793, 2010.
DOI : 10.1016/j.athoracsur.2009.11.032

J. Concato, A. Feinstein, and T. Holford, The Risk of Determining Risk with Multivariable Models, Annals of Internal Medicine, vol.118, issue.3, pp.201-211, 1993.
DOI : 10.7326/0003-4819-118-3-199302010-00009

P. Peduzzi, J. Concato, E. Kemper, T. Holford, and A. Feinstein, A simulation study of the number of events per variable in logistic regression analysis, Journal of Clinical Epidemiology, vol.49, issue.12, pp.1373-1382, 1996.
DOI : 10.1016/S0895-4356(96)00236-3

F. Roques, P. Michel, A. Goldstone, and S. Nashef, The logistic EuroSCORE, European Heart Journal, vol.24, issue.9, pp.881-883, 2003.
DOI : 10.1016/S0195-668X(02)00799-6

P. Michel, F. Roques, and S. Nashef, Logistic or additive EuroSCORE for high-risk patients????, European Journal of Cardio-Thoracic Surgery, vol.23, issue.5, pp.684-691, 2003.
DOI : 10.1016/S1010-7940(03)00074-5

R. Jin and G. Grunkemeier, Providence Health System Cardiovascular Study Group. Does the logistic EuroSCORE offer an advantage over the additive EuroSCORE. Interact Cardiovasc Thorac Surg, Feb Epub, vol.5, issue.1, pp.15-22, 2005.

G. Shanmugam, M. West, and G. Berg, Additive and logistic EuroSCORE performance in high risk patients, Interactive CardioVascular and Thoracic Surgery, vol.4, issue.4, pp.299-303, 2005.
DOI : 10.1510/icvts.2004.104042

B. Zingone, A. Pappalardo, and L. Dreas, Logistic versus additive EuroSCORE. A comparative assessment of the two models in an independent population sample, European Journal of Cardio-Thoracic Surgery, vol.26, issue.6, pp.1134-1174, 2004.
DOI : 10.1016/j.ejcts.2004.09.003

S. Karthik, A. Srinivasan, A. Grayson, M. Jackson, D. Sharpe et al., Limitations of additive EuroSCORE for measuring risk stratified mortality in combined coronary and valve surgery??????, European Journal of Cardio-Thoracic Surgery, vol.26, issue.2, pp.318-322, 2004.
DOI : 10.1016/j.ejcts.2004.02.007

F. Barili, D. Gregorio, O. Capo, and A. , Aortic valve replacement: Reliability of EuroSCORE in predicting early outcomes, International Journal of Cardiology, vol.144, issue.2, pp.343-345, 2010.
DOI : 10.1016/j.ijcard.2009.03.026

D. Wendt, B. Osswald, and K. Kayser, Society of Thoracic Surgeons Score Is Superior to the EuroSCORE Determining Mortality in High Risk Patients Undergoing Isolated Aortic Valve Replacement, The Annals of Thoracic Surgery, vol.88, issue.2, pp.468-474, 2009.
DOI : 10.1016/j.athoracsur.2009.04.059

T. Ghazy, U. Kappert, and A. Ouda, A question of clinical reliability: Observed versus EuroSCORE?predicted mortality after aor? tic valve replacement, J Heart Valve Dis, vol.19, issue.28, pp.16-20, 2010.

S. Leontyev, T. Walther, and M. Borger, Aortic Valve Replacement in Octogenarians: Utility of Risk Stratification With EuroSCORE, The Annals of Thoracic Surgery, vol.87, issue.5, pp.1440-1445, 2009.
DOI : 10.1016/j.athoracsur.2009.01.057

A. Parolari, L. Pesce, and M. Trezzi, Performance of EuroSCORE in CABG and off-pump coronary artery bypass grafting: single institution experience and meta-analysis, European Heart Journal, vol.30, issue.3, pp.297-304, 2009.
DOI : 10.1093/eurheartj/ehn581

M. Mikkelsen, S. Johnsen, P. Nielsen, and C. Jakobsen, The EuroSCORE in Western Denmark: A Population-Based Study, Journal of Cardiothoracic and Vascular Anesthesia, vol.26, issue.2, pp.258-64, 2012.
DOI : 10.1053/j.jvca.2011.09.012

M. Ranucci, S. Castelvecchio, L. Menicanti, S. Scolletta, B. Biagioli et al., An adjusted EuroSCORE model for high-risk cardiac patients, European Journal of Cardio-Thoracic Surgery, vol.36, issue.5, pp.791-98, 2009.
DOI : 10.1016/j.ejcts.2009.02.023

C. Reid, B. Billah, D. Dinh, J. Smith, P. Skillington et al., An Australian risk prediction model for 30-day mortality after isolated coronary artery bypass: The AusSCORE, The Journal of Thoracic and Cardiovascular Surgery, vol.138, issue.4, pp.904-914, 2009.
DOI : 10.1016/j.jtcvs.2009.03.020

H. Kurazumi, A. Mikamo, G. Fukamitsu, T. Kudou, M. Sato et al., Validation of the JapanSCORE versus the logistic EuroSCORE for predicting operative mortality of cardiovascular surgery in Yamaguchi University Hospital, General Thoracic and Cardiovascular Surgery, vol.57, issue.9, pp.599-604, 2011.
DOI : 10.1007/s11748-011-0784-2

M. Ranucci, S. Castelvecchio, L. Menicanti, A. Frigiola, and G. Pelissero, Accuracy, calibration and clinical performance of the EuroSCORE: can we reduce the number of variables?, European Journal of Cardio-Thoracic Surgery, vol.37, issue.3, pp.724-753, 2010.
DOI : 10.1016/j.ejcts.2009.08.033

J. Hobbhahn, H. Habazetti, P. Conzen, and K. Peter, Complications caused by protamine. 1: Pharmacology and pathophysiology, Anaesthesist, vol.40, pp.365-74, 1991.

L. Duebener, T. Sakamoto, F. Hatsuoka, C. Stamm, D. Zurakowski et al., Effects of Hematocrit on Cerebral Microcirculation and Tissue Oxygenation During Deep Hypothermic Bypass, Circulation, vol.104, issue.suppl 1, pp.1260-1264, 2001.
DOI : 10.1161/hc37t1.094912

E. Hannan, Z. Samadashvili, S. Lahey, A. Culliford, R. Higgins et al., Predictors of Postoperative Hematocrit and Association of Hematocrit with Adverse Outcomes for Coronary Artery Bypass Graft Surgery Patients with Cardiopulmonary Bypass, Journal of Cardiac Surgery, vol.72, issue.Suppl, pp.638-684, 2010.
DOI : 10.1111/j.1540-8191.2010.01143.x