This paper describes a feasibility support module for multi-center clinical trials in the Netherlands. Ir is a subproject within a large Electronic Patient Record for Cardiology project. The setup is based on the fact that each participating center has its own departmental information system. Therefor conversion tables are designed between these information systems and a central common data model. As time constraints ave not crucial E-mail is used to transfer information. The module was tested through prototyping in 3 centers. The results indicate that the module generates feasibility indications that are closer to reality than the numbers produced through educated guesses.