Pace making in the heart is controlled by the atrio-ventricular node and the sino-atrial node. These particular bunches of specialised cardiac cells are entirely responsible for the pulse making in the heart contracting the atriums then subsequently the ventricals.
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| we can see the SAN node in the top of the right atrium and the AVN node in the middle wall of the heart. |
Artificial Pace Makers
Artificial pace makers are small electrical devices that are implanted underneath the skin. Pacemakers are used to keep irregular hearts beating in a regular beat by providing an electric signal to the heart via a wire. this artificial electrical pulse replicates the actual pules that the SAN and AVN should make. People require pace makers to help them maintain a steady hreartbeat if they do not have one.
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| A diagram showing an artificial pacemaker in the heart. http://themoraltimes.com/wp-content/uploads/2012/03/pacemaker.jpg |
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