1. The coronary arteries receive oxygenated blood from the: a. Aorta                                c. Pulmonary veins b. Coronary sinus             d. Pulmonary arteries 2. The QRS interval should...

1. The coronary arteries receive oxygenated blood from the:

a. Aorta                                c. Pulmonary veins

b. Coronary sinus             d. Pulmonary arteries

2. The QRS interval should normally be ____________ seconds or smaller.

a. 0.20   c. 0.18

b. 0.12   d. 0.36

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

a. True b. False