What Is This?Its a Artificial Pacemaker. The natural pacemaker of our heart is a small mass of specialized cells in the top of the heart's right atrium (upper chamber) called the sinoatrial (SA) node or sinus node. It produces electrical pulses which makes the heart to beat. When the natural pacemakers are defective it is replace by Artificial Pacemakers which maintain the regular rhythm of the heart. These artificial pacemakers are of two types:
1. External (temporary)
2. Internal (permanent)
For more information on pacemakers -
Pacemakers
Wikipedia
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