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Basics: Difference between revisions
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* Finally we have the ECG leads themselves.These will be discussed below. | * Finally we have the ECG leads themselves.These will be discussed below. | ||
Note that the layout is different for | Note that the layout is different for each machine, but most machines will show the information above somewhere. | ||
{{clr}} | {{clr}} | ||
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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]] | [[Image:conduction_system_en.png|thumb|300px|The conduction system of the heart]] | ||
'''The sinoatrial node (SA node) contains the fastest physiological pacemaker cells of the heart | '''The sinoatrial node (SA node) contains the fastest physiological pacemaker cells of the heart; therefore they determine the [[Rate|heart rate]].''' | ||
'''First the [[heart|atria]] | '''First the [[heart|atria]] depolarize and contract. After that the [[heart|ventricles]]''' depolarize and contract. | ||
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. | 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. | ||