Which medication administered by the AEMT has minimal beta1 adrenergic effects but may increase heart rate and myocardial oxygen demand, and should be used with caution in patients with heart disease?

The middle tissue layer of the heart is the:

A) epicardium. B) endocardium. C) myocardium. D) pericardium.

A 34-year-old man has overdosed on an unknown drug and is unresponsive. His is breathing six times per minute and shallow. He has cyanosis around his lips and nail beds and he is cool to the touch. His breath sounds are diminished but clear. You should recognize which of the following conditions?

A) Hypoxia B) Tachypnea C) Apnea D) Dyspnea