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Cardiac conduction system
Components of the heart's conduction system
Basic representation of cardiac electrical conduction
Details
Identifiers
Latin
systema conducens cordis
MeSH
D006329
TA98
A12.1.06.002
FMA
9476
Anatomical terminology
[edit on Wikidata]
The cardiac conduction system (CCS, also called the electrical conduction system of the heart)[1] transmits the signals generated by the sinoatrial node – the heart's pacemaker, to cause the heart muscle to contract, and pump blood through the body's circulatory system. The pacemaking signal travels through the right atrium to the atrioventricular node, along the bundle of His, and through the bundle branches to Purkinje fibers in the walls of the ventricles. The Purkinje fibers transmit the signals more rapidly to stimulate contraction of the ventricles.[2]
The conduction system consists of specialized heart muscle cells, situated within the myocardium.[3] There is a skeleton of fibrous tissue that surrounds the conduction system which can be seen on an ECG. Dysfunction of the conduction system can cause irregular heart rhythms including rhythms that are too fast or too slow.
^Mantri S, Wu SM, Goodyer WR (July 2021). "Molecular Profiling of the Cardiac Conduction System: the Dawn of a New Era". Curr Cardiol Rep. 23 (8): 103. doi:10.1007/s11886-021-01536-w. PMID 34196831. S2CID 235690734.
^Cite error: The named reference NIH2022 was invoked but never defined (see the help page).
^Goodyer, WR; Beyersdorf, BM; Paik, DT; Tian, L; Li, G (2 August 2019). "Transcriptomic Profiling of the Developing Cardiac Conduction System at Single-Cell Resolution". Circulation Research. 125 (4): 379–397. doi:10.1161/CIRCRESAHA.118.314578. PMC 6675655. PMID 31284824.
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The cardiacconductionsystem (CCS, also called the electrical conductionsystem of the heart) transmits the signals generated by the sinoatrial node –...
if the SA node is damaged or if the electrical conductionsystem of the heart has problems. Cardiac arrhythmias can cause heart block, in which the contractions...
classified by the anatomic location of a dysfunction within the cardiacconductionsystem. Generally, these classifications involve the broad categories...
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dysfunction or atrioventricular conduction disturbances. Arrhythmias are due to problems with the electrical conductionsystem of the heart. A number of tests...
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electrical conductionsystem of the heart. The primary purpose of a pacemaker is to maintain an even heart rate, either because the heart's natural cardiac pacemaker...
Movement of ions across cell membranes causes these events. The cardiacconductionsystem (and AV node part of it) coordinates myocyte mechanical activity...
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during each individual cardiac cycle, or heartbeat, are initiated and orchestrated by signals of the heart's electrical conductionsystem, which is the "wiring"...
They conduct cardiac action potentials more quickly and efficiently than any of the other cells in the heart's electrical conductionsystem. Purkinje fibers...
Originally, a DC impulse was used to create lesions in the intra-cardiacconductionsystem. However, due to a high incidence of complications, widespread...
Progressive cardiacconduction defect (PCCD) is a hereditary cardiac condition marked by a progressive delay in impulse conduction via the His-Purkinje system, resulting...
to the Purkinje fibers, which provide electrical conduction to the ventricles, causing the cardiac muscle of the ventricles to contract at a paced interval...
electrocardiogram (EKG). Abnormalities of the cardiacconductionsystem (notably the Atrioventricular Node and His-Purkinje system) may predispose an individual to...
makes any classification imprecise. The cardiac myocyte has two general types of action potentials: conductionsystem and working myocardium. The action potential...
Ectopic beat is a disturbance of the cardiac rhythm frequently related to the electrical conductionsystem of the heart, in which beats arise from fibers...
Unlike the action potential in skeletal muscle cells, the cardiac action potential is not initiated by nervous activity. Instead, it arises from a group...
study of the conductionsystem of the heart is called cardiac electrophysiology (EP). An EP study is performed via a right-sided cardiac catheterization:...
nerve conduction study (NCS) is a medical diagnostic test commonly used to evaluate the function, especially the ability of electrical conduction, of the...
cardiac skeleton isolates electrical influence within these defined chambers. In normal anatomy, there is only one conduit for electrical conduction from...
A cardiac stress test is a cardiological examination that evaluates the cardiovascular system's response to external stress within a controlled clinical...
the heart at a specific moment in the cardiac cycle, restoring the activity of the electrical conductionsystem of the heart. (Defibrillation uses a therapeutic...
ventricle. They play an integral role in the electrical conductionsystem of the heart by transmitting cardiac action potentials from the bundle of His to the...
of alcohol may slow down the Cardiacconductionsystem, which is an important system for managing the Circulatory system. It may also shorten the refractory...
Cardiac amyloidosis is a subcategory of amyloidosis where there is depositing of the protein amyloid in the cardiac muscle and surrounding tissues. Amyloid...
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