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→The electric discharge of the heart
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==The electric discharge of the heart== | ==The electric discharge 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}} | ||