Good morning everyone! This is my first post, although l do read the postings every day and very much appreciate all your knowledge and input. I feel l have learnt so much more about af from all your contributions. I have PAF, diagnosed about two years ago which is fairly well controlled with Bisoprolol 7.5mg, Ramipril and Apixaban. Had all the usual tests on diagnosis which were normal. Saw cardiologist this week and he wants me to have a dobutamine stress echo as l mentioned some heaviness in my chest and shortness of breath when l start exercising. I do feel that this may be due to the hefty dose of Bisoprolol as l can push through it if l continue to exercise. I am really worried about having this test done as it may kick me into afib which l desperately want to avoid and l also have to stop taking bisoprolol 48 hours prior to the test which concerns me. Can anyone help me on this one? Sorry for the long post!