1. Oscilloscopic evidence of ventricular fibrillation can be mimicked by artifact. a. True b. False 2. In the presence of the lethal cardiac dysrhythmia ventricular fibrillation, attempts at...

1. Oscilloscopic evidence of ventricular fibrillation can be mimicked by artifact.

a. True b. False

2. In the presence of the lethal cardiac dysrhythmia ventricular fibrillation, attempts at countershock might be ineffective because of:

a. Metabolic acidosis                      c. Inadequate oxygenation

b. Ventricular irritability                 d. All the above