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If a person's natural heart rate (sinus rhythm) is too slow then the heart will not be able to pump enough blood to meet the needs of their body. A pacemaker is a small implantable device that can increase the heart rate by using an electrical stimulus to cause the heart muscle to contract. The pacemaker can be programed to stimulate the heart at a desired rate to increase the heart rate and enable cardiac output to be sufficient.

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17y ago

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