Undergraduate programs differ with each College and University. Some of them offer a degree in biomedical with another major possible, others with a minor, and others just the main program of biomedical engineering. An example is Drexel University in Philadelphia. In Canada, (as at Carleton and University of Ottawa) students normally get a degree in biomedical engineering combined with a major such as electrical engineering, mechanical engineering, or chemical engineering. Since biomedical programs contain a fair amount of physiology, medical devices, etc.. I think it is important to have a strong base in either an engineering discipline like electrical (which is my major) for focusing on medical devices; or mechanical if one is interested in rehabilitation and aids for the disabled. Computer science or computer engineering would provide a good background for medical informatics.
So I suggest you look at the programs from a few colleges you are interested to apply to and decide how the program combines with your interests.
Best wishes for a successful and satisfying career!
Prof. Monique Frize, P. Eng., O.C.
Carleton University and University of Ottawa