Electric beats: Pacemakers and the human heart

This video shows how heart arrhythmias can be treated by different types of pacemakers.  The heart does have a natural pacemaker which is the sinus node but there are times when that cardiac rhythm generating area can become out of sync and throw the heart out of its natural rhythm.  This video shows how pacemakers can get the heart beating in a more steady rhythm or with more complicated arrhythmias restart the heart.

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