This report documents the program and the outcomes of Dagstuhl Seminar 14062 "The Pacemaker Challenge: Developing Certifiable Medical Devices". The aim of the seminar was to bring together leading researchers and industrial partners of this field; the seminary ended up with 24 participants from 8 countries: Canada, Denmark, France, The Unites States, Germany, United Kingdom, Brazil. Through a series of presentations, discussions, and working group meetings, the seminar attempted to get a general view of the field of medical devices and certification issues through the pacemaker challenge. The seminar brought together, on the one hand, researchers from the different notations and various tools. The main outcome of the seminar is the exchange of information between different groups and the project of a book.