It's probaly because you didn't respond fast enough. That should have been a code response IMMEDIATELY. I'm an RT, so not really sure how you all do it on the RN side, but if I go into assess a patient who's bradycardic (especially to the 30s) and not responding, I'm pulling the code alarm. IF they tell you that you are wrong for calling the CAT, I would stand up and politely tell them that you will work where they don't advocate killing people, hand them your badge and leave.