Why do ventricular rhythms occur?
A. Because higher pacemaker sites within the heart have failed
B. Because the rate impulses from the SA node are too fast for ventricular response
C. Because the ventricular impulses are stronger than the atrial impulses
D. Because a first-degree AV block prevents atrial impulses from reaching the ventricles
Answer: A
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Fill in the blank(s) with the appropriate word(s).
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