mention the role of pacemaker in human heart
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It helps the heart beat in a regular rhythm. Pacemakers can help pace the heart in cases of slow heart rate, fast and slow heart rate, or a blockage in the heart's electrical system. A pacemaker can pace the heart's upper chambers (the atria), the lower chambers (the ventricles), or both.
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SA node is natural pacemaker in heart
it helps regular heart beat in rhythm
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