Which arrhythmia requires the insertion of a permanent cardiac pacemaker?
A) murmur
B) atrial septal defect
C) sick sinus syndrome
D) aneurysm
C
Explanation: A) A murmur is not an arrhythmia and is not treated with a pacemaker.
B) An atrial septal defect is not treated with a pacemaker.
C) Correct! Sick sinus syndrome is an arrhythmia that is treated with a pacemaker.
D) An aneurysm is not an arrhythmia and is not treated with a pacemaker.
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