Majoring in biomedical engineering would not necessarily relegate you to wearing scrubs and working in a hospital. For perspective...there is some great work in the area of Biomedical Engineering going on at the University of Illinois, MIT and the University of California - San Diego to name a few. Regarding the latter (UDSD), please see Dr. Todd Coleman's TED talk..I think you will find it quite interesting how they can "paste" circuits to the body and monitor all manner of vitals. So in Biomedical Engineering you can measure/monitor the vitals of a subject and enhance human-computer interface(s) for the purpose of better health. And the more non-intrusive ways you can do this, the easier it will be to collect broad data that would help in preventative medicine. Take a look at the video as well as some papers by Dr. Coleman on the topic. I think you'll be enlightened.