1. The electrocardiogram is used to: a. Determine pulse rate b. Detect valvular dysfunction c. Evaluate electrical activity in the heart d. Determine whether the heart is beating 2. The PR interval...

1. The electrocardiogram is used to:

a. Determine pulse rate

b. Detect valvular dysfunction

c. Evaluate electrical activity in the heart

d. Determine whether the heart is beating

2. The PR interval should normally be _______ seconds or smaller.

a. 0.10   c. 0.08

b. 0.12   d. 0.20

3. The QRS interval should normally be _______ seconds or smaller.

a. 0.20   c. 0.18

b. 0.12   d. 0.36