Perform three cycles of cascade screening through several generation of family members of an index case. The contact of relatives will be initiated by the index case and supported by a web-based centralized service. The index case will be provided with a prepared email or Whatsapp message that the index case can further forward to his first-degree relatives. The email/message will contain a link to a secured web application with a code for the connection. By clicking on the link, the relative will connect to a specifically designed app. The app will provide information about the transmission mode of FH, the cardiovascular risk associated with FH and the way how to reduce this risk. The relative can then fill out information and provide agreement to be contacted for the study. The nearest specialized clinic will then contact the relative to organize further screening with similar processes.

The yield of detection is the number of test performed/number of contactable relatives.