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The Pacemaker of the Heart

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The Pacemaker of the HeartThe pacemaker of the heart, a tiny area of specialized nervous tissue in the right atrium, sets the heart beating about seventy times a minute. Without it the heart would beat only forty times per minute, which is too slow for the body's needs. The pacemaker, or sinuatrial node, regularly sends out nerve impulses which spread through the two atria, causing them to contract. From the atrioventricular node the contraction spreads down special conducting tissue, the bundle of His, causing the ventricles to contract and pump blood out of the heart.

Channel: Howto & Style
Uploaded: August 3, 2007 at 9:28 pm
Author: dizzo95

Length: 00:40
Rating: 4.00
Views: 16650

Tags: Heart  of  Pacemaker  The  

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Video Comments

lily14895 (May 13, 2008 at 12:22 am)
my frind has a pace maker
78452312 (April 18, 2008 at 7:37 pm)
I had VNS Surgery. Vagus Nerve Stimulator implanted in me.
RandomLesson101 (April 14, 2008 at 2:54 pm)
Izzy is lucky. We doctor have advanced lots since the past 10 years. I don't want to frighten people but Heart surgery is very trick but like all apointed procedures the risks of damage are very slim. ES is actualy more risky than anything else
Izzythegecko (April 10, 2008 at 10:10 pm)
i have an artificial one :(
N1TEMAR3187 (October 26, 2007 at 3:23 pm)
i had heart surgery so this is interesting
TBaker1964 (August 9, 2007 at 12:58 pm)
My doctor wants to burn my AV node and have my ICD take over? wtf

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