Heart pacemaker: MedlinePlus Medical Encyclopedia

A pacemaker is a small, battery-operated device. This device senses when your heart is beating too slowly. It sends a signal to your heart that makes your heart beat at the correct pace.

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कार्डियक पेसमेकर - विकिपीडिया

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Pacemaker - Mayo Clinic

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What is the role of the pacemaker? - Quora

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