A characteristic event in junctional dysrhythmias is
a. irregular rhythm.
b. rapid depolarization to the ventricles.
c. the spread of the impulse in two directions at once.
d. a widened QRS.
C
After an ectopic impulse arises in the junction, it spreads in two directions at once. One wave of depolarization spreads upward into the atria and depolarizes them, causing the recording of a P wave on the electrocardiogram. At the same time, another wave of depolarization spreads downward into the ventricles through the normal conduction pathway, producing a normal QRS complex.
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