1. Most atrial fibrillation waveforms are not followed by a QRS complex because the: a. Impulses are initiated in the left ventricle b. Stimuli are not strong enough to be conducted c. Ventricle can...

1. Most atrial fibrillation waveforms are not followed by a QRS complex because the:

a. Impulses are initiated in the left ventricle

b. Stimuli are not strong enough to be conducted

c. Ventricle can receive only 120 stimuli in 1 minute

d. AV junction is unable to conduct all the excitation impulses

2. Identify the normal impulse flow of the heart’s electrical conduction system:

I. SA node

II. Purkinje fibers

III. Bundle of His

IV. AV node

V. Bundle branches

VI. Internodal pathways

a. 1, 5, 2, 4, 6, 3

b. 1, 6, 4, 3, 5, 2

c. 1, 4, 3, 6, 5, 2

d. 1, 2, 3, 4, 5, 6