Types of data collection from the patients:~The type of surgery Age Sex Smoking Diabetes History of renal disease Preoperative anemia Preoperative creatinine Preoperative urea BMI NYHA class ASA score EuroScore I Preoperative LVEF Disease COVID -19 Date of illness Hospitalization for COVID-19 COVID 19 vaccination status Necessary vasopressor peri-operative duration and Maximum dose Perioperative positive inotrope required Bypass duration Duration of Aortic clamping Intraoperative transfusions Post operative creatinine - peak level Post-operative urea peak level Duration of post-operative oro-tracheal intubation NIV required Duration of hospitalization in Cardiac Intensive Care Unit Duration of postoperative hospitalization
A. Primary objective~Identifying risk factors for peri-operative complications in patients who have had COVID-19.~B. Secondary objectives~Identifying peri-operative complications in patients who have had COVID-19. Follow-up of peri-operative complications during hospitalization. Identifying the safe distance at which a patient can be operated after a Sars CoV2 infection without having an increased risk of peri-operative complications.~C. Study inclusion and exclusion criteria~Inclusion criteria~Patients should be included if:~are scheduled for elective cardiac surgery with extracorporeal circulation (bypass);~they give their consent for their data to be included in studies;~Exclusion criteria~Patients should be excluded if:~they have emergency surgery;~have had Sars Cov 2 infection more recently than 3 months;~D. Data Collection~It is done in an excel table. Data collection is done anonymously. No patient-identifying data will be collected. The collected data will be about comorbidities, COVID-19 status - disease and vaccination, postoperative complications.