 Our institution is a high volume centre for AF ablations that performs 300-350 procedures per year. Because of the non-invasive character of the MUSE-device investigators expect a high recruitment rate and plan to complete enrollment of the 60 patients within 6 months. With a follow-time of 3 months investigators expect to complete patient inclusion and follow-up after 9 months. Data analysis will take approximately 4 weeks resulting in a total study duration of 10 months. 