A pacemaker is composed of three main components: a pulse generator, one or more leads, and an electrode on each lead.
Here's a breakdown of each component:
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Pulse Generator: This is the "brain" of the pacemaker. It contains a battery and electronic circuitry that generates the electrical impulses that stimulate the heart to beat. The pulse generator is typically implanted under the skin near the collarbone.
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Leads: These are insulated wires that carry the electrical impulses from the pulse generator to the heart. They are inserted into a vein and guided to the appropriate chamber(s) of the heart (atrium and/or ventricle).
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Electrodes: Located at the tip of each lead, the electrodes are in direct contact with the heart tissue. They deliver the electrical impulses from the pulse generator to stimulate the heart muscle to contract. The electrodes can be either screwed into the heart muscle or placed against the heart wall.
In summary, the pulse generator creates the electrical signal, the leads transmit the signal to the heart, and the electrodes deliver the signal to the heart muscle. These components work together to ensure the heart beats at a regular and appropriate rate.
