Role of 3D Echocardiography Knowledge-based Reconstruction in ACHD

"Group 1 will have healthy adult volunteers recruited at the workplace following specific criteria to participate in the study. A research cardiac ultrasound protocol to assess the RV will be performed at two different visits, with a maximum interval of two weeks between them.~Group 2 will have ACHD patients with known moderate or severe pulmonary regurgitation after ToF repair, following specific criteria to participate in the study. This group of patients will be studied in two separate visits. The patients will be recruited during the first visit when attending to an existing hospital appointment for ACHD CMR. A research cardiac ultrasound protocol to assess the RV will be performed on the same day, either before or after the CMR. For all patients who will have a second follow-up visit at the ACHD outpatient clinic within a maximum interval of one year, the same research protocol will be performed, in addition to the usual cardiac ultrasound."