Out of hospital cardiac arrest (OOHCA) remains a leading cause of death in Austria.~Current guidelines recommend to address potentially reversible causes for OOHCA early to improve survival and some of these causes can be recognized using echocardiography. The usefulness of trans-thoracic echocardiography during OOHCA seems to be limited as image acquisition may prolong now flow time and image quality is variable. These limitations might be overcome with trans-esophageal echocardiography.~The investigators will investigate the feasibility of prehospital performed trans-esophageal echocardiography in ten OOHCA patients undergoing advanced life support.~In addition to routine care by paramedics and emergency physicians, a dedicated expert in emergency ultrasound will perform trans-esophageal echocardiography in these patients.~Primary outcome parameter: Is it possible to obtain trans-esophageal images of the heart within 10 minutes after arrival of the study team?
This study shall investigate the feasibility of prehospital performed trans-esophageal echocardiography in out of hospital cardiac arrest.~The investigators will include ten patients undergoing advanced life support in this study and determine if it is possible to acquire adequate trans-esophageal images within 10 minutes after arrival of the study team on scene.