Which of the following BEST describes the manner in which cast iron fails during fire conditions?

A junctional escape beat occurs when:

A) the AV junction becomes irritable and temporarily overrides the SA node. B) there is a conduction block between the SA node and AV node. C) there is an accessory pathway that causes reentry of the impulse at the AV node. D) the rate of the SA node is slower than that of the AV node.

When should the AEMT use the pulse oximeter?

A) After contacting medical direction for authorization B) Routinely on all patients with a medical or trauma complaint C) On any and all patients one year of age and older D) Only if the AEMT is having difficulty getting a blood pressure