The role of a pacemaker is to:

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(C) pacemaker is a small medical device that is implanted in the chest to help control the heartbeat. Its primary function is to send electrical impul

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Initiate heartbeat

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(C) pacemaker is a small medical device that is implanted in the chest to help control the heartbeat. Its primary function is to send electrical impulses to the heart muscle to maintain a suitable heart rate. In patients with arrhythmias or conduction defects,the natural pacemaker (the $SA$ node) may fail to function correctly. The artificial pacemaker acts as a substitute to initiate and regulate the rhythmic contractions of the heart,thereby ensuring that the heartbeat is maintained at a normal pace.

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