How often do you draw Troponins at your hospital?

Attention All Tele Nurses:

I'm hoping to get a policy changed at my facility.

How often does your hospital have you draw troponin levels? Currently, we are required to check them every 3 hours. I understand that they can be done every 3, 6, and even 8 hours. What is your policy, and what state are you in?

Thanks!