like Bossy, said, not sure what exactly you are asking...
but a better question is, why would an unemotional person become an EMT?
i think we would all agree that for good patient care, emotions are an important part of what we do...
Read Ambulance Girl by Jane Stern.
http://www.amazon.com/Ambulance-Girl-Saved-Myself-Becoming/dp/140004832X