Isolated heart conduction system showing Purkinje fibers
The QRS complex is the large peak.
Details
Identifiers
Latin
rami subendocardiales
MeSH
D011690
TA98
A12.1.06.008
TA2
3961
FMA
9492
Anatomical terminology
[edit on Wikidata]
The Purkinje fibers, named for Jan Evangelista Purkyně, (English: /pɜːrˈkɪndʒi/pur-KIN-jee;[1]Czech:[ˈpurkɪɲɛ]ⓘ; Purkinje tissue or subendocardial branches) are located in the inner ventricular walls of the heart,[2] just beneath the endocardium in a space called the subendocardium. The Purkinje fibers are specialized conducting fibers composed of electrically excitable cells.[3] They are larger than cardiomyocytes with fewer myofibrils and many mitochondria. They conduct cardiac action potentials more quickly and efficiently than any of the other cells in the heart's electrical conduction system.[4] Purkinje fibers allow the heart's conduction system to create synchronized contractions of its ventricles, and are essential for maintaining a consistent heart rhythm.[5]
^Jones, Daniel (2011). Roach, Peter; Setter, Jane; Esling, John (eds.). Cambridge English Pronouncing Dictionary (18th ed.). Cambridge University Press. ISBN 978-0-521-15255-6.
^Feher, Joseph (January 1, 2012), Feher, Joseph (ed.), "5.5 – The Cardiac Action Potential", Quantitative Human Physiology, Boston: Academic Press, pp. 458–466, doi:10.1016/b978-0-12-382163-8.00049-9, ISBN 978-0-12-382163-8, retrieved November 13, 2020
^Stocum, David L. (January 1, 2012), Stocum, David L. (ed.), "Chapter 7 – Regeneration of Cardiac Muscle and Hematopoietic Tissues", Regenerative Biology and Medicine (Second Edition), San Diego: Academic Press, pp. 161–182, doi:10.1016/b978-0-12-384860-4.00007-1, ISBN 978-0-12-384860-4, retrieved November 13, 2020
^"Purkinje fiber." The American Heritage® Medical Dictionary. 2007. Houghton Mifflin Company 23 Oct. 2016 http://medical-dictionary.thefreedictionary.com/Purkinje+fiber
^Brooker, Graham (January 1, 2019), Segil, Jacob (ed.), "Chapter Fourteen – Pacemakers", Handbook of Biomechatronics, Academic Press, pp. 567–589, doi:10.1016/b978-0-12-812539-7.00014-3, ISBN 978-0-12-812539-7, S2CID 239396730, retrieved November 13, 2020
endocardium in a space called the subendocardium. The Purkinjefibers are specialized conducting fibers composed of electrically excitable cells. They are...
parallel fibers from the deeper-layers pass. These parallel fibers make relatively weaker excitatory (glutamatergic) synapses to spines in the Purkinje cell...
the cerebellum Purkinjefibers, located in the heart The visual Purkinje effect of how human beings do not see color in dim light Purkinje images, reflections...
bundles and fascicles give rise to thin filaments known as Purkinjefibers. These fibers distribute the impulse to the ventricular muscle. The ventricular...
His, and through the bundle branches to Purkinjefibers in the walls of the ventricles. The Purkinjefibers transmit the signals more rapidly to stimulate...
connect with the Purkinjefibers. This passage takes approximately 25 ms. The Purkinjefibers are additional myocardial conductive fibers that spread the...
is the Bundle of His. The left and right bundle branches, and the Purkinjefibers, will also produce a spontaneous action potential at a rate of 30-40...
transmitting cardiac action potentials from the bundle of His to the Purkinjefibers. There are two branches of the bundle of His: the left bundle branch...
ventricles the signal is carried by specialized tissue called the Purkinjefibers which then transmit the electric charge to the heart muscle. A racing...
small size. 'U' waves are thought to represent repolarization of the Purkinjefibers. However, the exact source of the U wave remains unclear. The most...
potential (EPSP) in Purkinje cells. In this way climbing fibers (CFs) perform a central role in motor behaviors. The climbing fibers carry information from...
produces an action potential. Other cells within the heart (including the Purkinjefibers and atrioventricular node) can also initiate action potentials; however...
the bundle of His, and the Purkinjefibers are larger in diameter and conduct signals at a fast rate. The Purkinjefibers rapidly conduct electrical signals;...
the atrioventricular node down into the bundle of His and into the Purkinjefibers, spreading down and to the left throughout the ventricles. This orderly...
bundle of His (AV bundle), down the bundle branches, and into the Purkinjefibers. This would depolarize the ventricles and cause them to contract. In...
Purkinjefibers (p-fibers) found in the hearts moderator bands are a specialized cardiac muscle fiber that causes the heart to contract. The Purkinje...
contraction (PVC) is a common event where the heartbeat is initiated by Purkinjefibers in the ventricles rather than by the sinoatrial node. PVCs may cause...
completed. EADs most commonly originate in mid-myocardial cells and Purkinjefibers, but can develop in other cardiac cells that carry an action potential...
It was the first plough on wheels, which made it easier to manage. Purkinjefibers are organs in the human heart discovered by Jan Evangelista Purkyně...
conduct impulses through the interventricular septum and into the Purkinjefibers, as these are responsible for the depolarization of contractile cells...
signal travels into the Purkinjefibers. The division of the signal into a right and left bundle and then into the Purkinjefibers allows for a simultaneous...
atrioventricular node and into the bundle of His, from which it travels along Purkinjefibers to reach and depolarize the ventricles. This sinus rhythm is important...
nuclei in the brainstem. Each Purkinje cell receives excitatory input from 100,000 to 200,000 parallel fibers. Parallel fibers are said to be responsible...
ventricles occurs almost simultaneously, via the bundle of His and Purkinjefibers. If they are working efficiently, the QRS complex duration in adults...
pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinjefibers Pericardial cavity pericardial sinus Pericardium fibrous pericardium...
pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinjefibers Pericardial cavity pericardial sinus Pericardium fibrous pericardium...
the Purkinjefibers at the bottom (apex) of the heart, causing ventricular contraction.[citation needed] In addition to the SAN, the AVN and Purkinje fibres...
atria and through the circuits known as the bundle of His and the Purkinjefibers—all which stimulate contractions of both ventricles. The programmed...
component of the natural pacemaker. First described in the late 1970s in Purkinjefibers and sinoatrial myocytes, the cardiac pacemaker "funny" (If) current...
Global Information
