Editing Cardiac conduction system (section)

{{short description|Aspect of heart function}}
{{More citations needed|date=October 2013}}
{{Infobox anatomy
| Name        = Cardiac conduction system
| Latin       = systema conducens cordis
| Greek       =
| Image      = Cardiac Conduction System.jpg
| Caption    = Components of the heart's conduction system  
| Image2     = Basic representation of cardiac conduction.gif
| Caption2   = Basic representation of cardiac electrical conduction |Precursor   =
| System      =
| Artery      =
| Vein        =
| Nerve       =
| Lymph       =
}}
The '''cardiac conduction system''' ('''CCS''', also called the '''electrical  conduction system of the heart''')<ref name="Goodyer">{{cite journal | vauthors = Mantri S, Wu SM, Goodyer WR | title = Molecular Profiling of the Cardiac Conduction System: the Dawn of a New Era | journal = Curr Cardiol Rep | volume = 23 | issue = 8 | pages = 103 | date = July 2021 | pmid = 34196831 | doi = 10.1007/s11886-021-01536-w |s2cid=235690734 }}</ref> transmits the [[Cardiac action potential|signals]] generated by the [[sinoatrial node]] – the [[heart]]'s [[Cardiac pacemaker|pacemaker]], to cause the [[heart muscle]] to [[Muscle contraction|contract]], and pump blood through the body's [[circulatory system]]. The [[Cardiac pacemaker|pacemaking]] signal travels through the [[right atrium]] to the [[atrioventricular node]], along the [[bundle of His]], and through the [[bundle branches]] to [[Purkinje fiber]]s in the [[Ventricle (heart)|walls of the ventricles]]. The Purkinje fibers transmit the signals more rapidly to stimulate contraction of the ventricles.<ref name="NIH2022"/>

The conduction system consists of specialized [[Cardiomyocyte|heart muscle cells]], situated within the [[myocardium]].<ref name="Goodyer 2
">{{cite journal |last1=Goodyer |first1=WR |last2=Beyersdorf |first2=BM |last3=Paik |first3=DT |last4=Tian |first4=L |last5=Li |first5=G |title=Transcriptomic Profiling of the Developing Cardiac Conduction System at Single-Cell Resolution. |journal=Circulation Research |date=2 August 2019 |volume=125 |issue=4 |pages=379–397 |doi=10.1161/CIRCRESAHA.118.314578 |pmid=31284824|pmc=6675655 }}</ref> There is a [[cardiac skeleton|skeleton of fibrous tissue]] that surrounds the conduction system which can be seen on an [[ECG]]. Dysfunction of the conduction system can cause [[Heart arrhythmia|irregular heart rhythms]] including rhythms that are [[tachycardia|too fast]] or [[bradycardia|too slow]].