It is expected that relatives to the DCM patients included will be offered the possibility to participate in this study. Experience shows that in average about 4 relatives pr index patient will be offered clinical examination, thus roughly 480 clinical examinations is still to be performed. The clinical examinations will be performed on the cardiology departments at Odense University Hospital (OUH) and Aarhus University Hospital (AUH) in collaboration with DMSc Hans Eiskjaer. The examinations are expected to be completed in September 2015. The relatives will be informed about the genetic results continuously, and they will be offered genetic counselling according to usual guidelines.