end portion of the [[excitation and conduction system|irritation and conduction system]] of the heart, transmits the excitation emanating from the [[Sinusknoten/en|sinus node]] and conducted via the [[atrioventricular node, AV node|AV node]] to the [[Arbeitsmyokard/en|working myocardium]].
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end portion of the [[Erregungsbildungs- und Leitungssystem/en|electrical conduction system]] of the heart, transmits the excitation emanating from the [[Sinusknoten/en|sinus node]] and conducted via the [[atrioventricular node, AV node|AV node]] to the [[Arbeitsmyokard/en|working myocardium]].