- each patient is given a code to guarantee anonymity, used to identify both data on paper and imaging recordings (fluoroscopic and echocardiographic). Recordings are supplied to the Core-Labs (Bioengineering and Echocardiography) on digital support. Results from imaging recordings analyses are sent to the Principal Investigator and to the Steering Committee (composed by the Principal Investigator, the Study Directors and the Sites Principal Investigators). The original recordings are kept in each center's archives;