The rational of the study is the description of the evolution of systolic cardiac function
post-stunning, evaluated by transesophageal minimally invasive echocardiography (hTEE). The
uses of these non-invasive methods have proved to be accurate for the qualitative and
semi-quantitative determination of the contractile function of the left ventricle and the
volume status of the patient. Furthermore the use of this technique has been demonstrated to
be a reliable method to analyze the stunning recovery infarction after controlled cardiac
arrest during the extra-corporeal circulation.