You are correct.
Us dumb EMTs can't even think good. By the way, what's a book?
Don't worry - It's cool man, us ambulance drivers can take the criticism and insult, for that is the meaning of our existence.
All joking aside, this skill is nowhere near the EMT scope for the exact reasons that Island Medic stated. We don't concern ourselves with extensive cardiology. If you take an EKG class, you learn that you put the stickers on the patient, the magicians inside the box tell the paramedic if the person's heart is sick, the paramedic zaps the person's heart after that sometimes. We drive fast so that the hospital people can use further witchery to make the person's heart less sick. That's all you need to know. Glory.