Basics: Difference between revisions

Basics (view source)

54 bytes added , 30 May 2009

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 ==The electric discharge of the heart==
-'''The sinal node (SA node) contains pacemakercells which determine the heart frequency.'''
+[[Image:conduction_system_en.png|thumb|300px|The conduction system of the heart]]
+'''The sinal node (SA node) contains the fastest physiological pacemaker cells of the heart, therefore they determine the [[Rate|heart rate]].'''
 '''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 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>
 {{clr}}