The approach followed in the euHeart project is to divide the work packages (WPs) into two groups: the technical and application WPs. The technical WPs (WP1-4) developed common technology and concentrated their efforts on the development of generic tools including (WP3), and assimilation (WP4). The application WPs (WP5-9) focused their activities on disease-specific developments such as the development and extension of biophysical models, acquisition and processing of biomedical data, integration into prototypes, and validation for Cardiac Resynchronization Therapy (WP5),(WP6),(WP7),(WP8) and (WP9). In addition, they defined the requirements for the development of research tools in the technical WPs. The structure was complemented by a workpackage on (WP10) and obligatory workpackages for handling dissemination and exploitation of knowledge and project: