Perioperative Cardiac Arrest and Outcome

With ethical approvement, the investigators want to assess the incidence, circumstances and outcomes of patients with perioperative cardiac arrests over a period of 8 years. Currently, there is little data and information about a cardiovascular arrests during anesthesia. Little is also known about the health-related quality of life afterwards. In the investigators research project, the investigators want to find out if there are, for example, specific factors that cause cardiovascular arrests and factors that can improve the chances of survival after a cardiovascular arrest. The investigators are also looking for possible factors and measurements that can minimize or even prevent future events during anesthesia.