In which class of the Vaughn-Williams classification system of anti-dysrhythmic medications does verapamil belong?

A small earthquake has damaged several houses in a neighborhood. As you are sizing up the scene, an anxious man tells you his neighbor is trapped inside his home. He asks you to help get her out of the house. You should:

A) notify dispatch that you are entering a residence for search and rescue. B) tell the man you must wait outside but encourage him to attempt a rescue. C) tell the man you will need additional resources to perform a safe rescue. D) use your public address (PA) system to instruct the trapped neighbor to try to free herself.

Which of the following determines effectiveness of high-frequency external chest wall compres-sion therapy? 1. Compression frequency 2. Largest volumes 3. Flow bias

a. 1 only b. 2 only c. 1 and 3 only d. 2 and 3 only