In which atrial dysrhythmia does the pacemaker site shift between the SA node, other sites in the atria, and/or the AV junction?

Defibrillation is indicated for which of the following situations?

A) Pulseless bradycardia B) Asystole C) Pulseless electrical activity D) Pulseless ventricular tachycardia

The part of the brain that controls breathing is called the:

A. medulla oblongata. B. cerebrum. C. cerebellum. D. spinal cord.