Basics: Difference between revisions

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==The electric discharge of the heart==
==The electric discharge of the heart==
[[Image:conduction_system_en.png|thumb|300px|The conduction system of the heart]]
'''The sinal node (SA node) contains pacemakercells which determine the heart frequency.'''
'''The sinal node (SA node) contains pacemakercells which determine the heart frequency.'''
'''First the [[heart|atria]] depolarise and contract, after that the [[heart|ventricles]]'''
'''First the [[heart|atria]] depolarise and contract, after that the [[heart|ventricles]]'''
The electrical signal between the atria and the ventricles goes from the sinus node, via the atria to the AV-node (atrioventricular transition) to the His bundle and subsequently to the right and left bundle branch, which end in a dense network of Purkinje fibers.
The electrical signal between the atria and the ventricles goes from the sinus node, via the atria to the AV-node (atrioventricular transition) to the His bundle and subsequently to the right and left bundle branch, which end in a dense network of Purkinje fibers.
The depolarization of the heart results in an electrical force which has a direction and magnitude: an electrical vector. This vector changes every millisecond of the depolarization. In the animation vectors for atrial depolarization, ventricular depolarization and ventricular repolarization are shown.
[[Image:conduction_system_en.png|thumb|300px|The conduction system of the heart]]
<flashow>http://nl.ecgpedia.org/images/b/bc/Normal_SR_vector.swf|height=300px</flashow>
<flashow>http://nl.ecgpedia.org/images/b/bc/Normal_SR_vector.swf|height=300px</flashow>
{{clr}}
{{clr}}

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