In a hospital telemetry unit (for cardiac patients), who staffs it (i.E., what kinds of doctors and nurses)? If you get transferred to telemetry from another floor, does your doctor go with you?

Varies by location. A telemetry unit most frequently would have patients taken care of by cardiologists, internists, or family medicine doctors. The nurses on a cardiac unit should be acls (advanced cardiac life support) certified. If you physically move floors in a hospital, your doctor should remain the same. An exception may be a transfer to an intentive care unit- may have different doctors while you are there.
Telemetry. Telemetry is referred to cardiac monitoring at a distance. Your doc may follow you still even on telemetry unit. Cardiac unit nurses will staff such a unit. Doctors will be different - those whose patients stay on the unit.