On what basic principle do electronic pacemakers work?
A. The impulse with the highest voltage controls the heartbeat.
B. The fastest pacemaker, whether inherent or artificial (electronic), controls the heartbeat.
C. The impulse with the longest duration controls the heartbeat.
D. The heartbeat is more readily controlled by electronic impulses than by the heart's inherent impulses.
Answer: B
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Answer the following statement true (T) or false (F)