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4. Pacemaker Parts: the Leads

The leads are thin, flexible, insulated wires the surgeon implants in the heart's ventricle. The other end of the lead is attached to the generator. There is an ebb and flow of information along the leads; they receive both electrical information from the heart (sensing) and transmit electrical impulses to the heart to stimulate it to beat (pacing).

parts of a pacemakers

bdspn / Getty Images

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