Bradycardia historical perspective: Difference between revisions

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==Overview==
==Overview==


In 1839, Jan Evangelista [[Purkinje fibers|Purkinje]] discovered a net of [[gelatinous]] fibres in the [[Endocardium|subendocardium]] of the heart. Walter Gaskell in the 1880s observed that the impulse of the heart began in the [[sinus venosus]], and that this region had the most rhythmic ability. A conducting bundle between the [[atrium]] and the [[ventricle]] was found by Wilhelm His, Jr in 1893. In 1906, Sunao Tawara found a “complex Knoten” of tissue at the proximal end of the [[His bundle|His bundle.]] He concluded that this was the inception of an electrical conducting system that continued from the [[AV node]] through the [[bundle of His]], divided into the bundle branches, and terminated as the Purkinje fibres. In 1906, Martin Flack, a medical student, reported to Keith the first observation of the mammalian [[Sinoatrial node|sinoatrial node (SAN)]].
Jan Evangelista Purkinje found a net of gelatinous fibers in the subendocardium of the heart in 1839. Later on, in 1880s, walter gaskell found that the region where the cardiac impulse generated, near the sinus venosus. Conduction bundle which links the sinus node and AV node was found by Wilhelm His Jr in 1893. In 1906, Sunao tawara assumed that a tissue present at the proximal end of the his bundle was the beginning of an electrical conducting system, which proceeded from the AV node through the bundle of His, separated into the bundle branches, and ended up as the Purkinje fibers. In the same year Flack and Keith made first observation of the mammalian sinoatrial node (SAN).


==Historical Perspective==
==Historical Perspective==


*In 1839, Jan Evangelista [[Purkinje fibers|Purkinje]] discovered a net of gelatinous fibres in the sub[[endocardium]] of the heart.<ref name="pmid16769927">{{cite journal |vauthors=Silverman ME, Grove D, Upshaw CB |title=Why does the heart beat? The discovery of the electrical system of the heart |journal=Circulation |volume=113 |issue=23 |pages=2775–81 |date=June 2006 |pmid=16769927 |doi=10.1161/CIRCULATIONAHA.106.616771 |url=}}</ref>
*Jan Evangelista Purkinje found a net of gelatinous fibers in the subendocardium of the heart in 1839.
*Walter Gaskell in the 1880s observed that the impulse of the heart began in the [[sinus venosus]], and that this region had the most rhythmic ability.
*Later on, in 1880s, Walter Gaskell found that the region where the cardiac impulse generated was near the sinus venosus.  
*A conducting bundle between the [[Atrium (heart)|atrium]] and the [[ventricle]] was found by Wilhelm His, Jr in 1893.
*Conduction bundle which links the sinus node and AV node was found by Wilhelm His Jr in 1893.
*In 1906, Sunao Tawara found a “complex Knoten” of tissue at the proximal end of the [[His bundle]]. He concluded that this was the inception of an electrical conducting system that continued from the [[AV node]] through the [[bundle of His]], divided into the bundle branches, and terminated as the [[Purkinje fibres]].
*In 1906, Sunao tawara assumed that a tissue present at the proximal end of the his bundle was the beginning of an electrical conducting system, which proceeded from the AV node through the bundle of His, separated into the bundle branches, and ended up as the Purkinje fibers.
*In 1906, Martin Flack, a medical student, reported to Keith the first observation of the mammalian [[sinoatrial node]] (SAN).<ref name="pmid17890694">{{cite journal |vauthors=Silverman ME, Hollman A |title=Discovery of the sinus node by Keith and Flack: on the centennial of their 1907 publication |journal=Heart |volume=93 |issue=10 |pages=1184–7 |date=October 2007 |pmid=17890694 |pmc=2000948 |doi=10.1136/hrt.2006.105049 |url=}}</ref>
*In the same year Flack and Keith made first observation of the mammalian sinoatrial node (SAN).


==References==
==References==
<references />
<references />

Revision as of 22:42, 31 August 2020

Overview

Jan Evangelista Purkinje found a net of gelatinous fibers in the subendocardium of the heart in 1839. Later on, in 1880s, walter gaskell found that the region where the cardiac impulse generated, near the sinus venosus. Conduction bundle which links the sinus node and AV node was found by Wilhelm His Jr in 1893. In 1906, Sunao tawara assumed that a tissue present at the proximal end of the his bundle was the beginning of an electrical conducting system, which proceeded from the AV node through the bundle of His, separated into the bundle branches, and ended up as the Purkinje fibers. In the same year Flack and Keith made first observation of the mammalian sinoatrial node (SAN).

Historical Perspective

  • Jan Evangelista Purkinje found a net of gelatinous fibers in the subendocardium of the heart in 1839.
  • Later on, in 1880s, Walter Gaskell found that the region where the cardiac impulse generated was near the sinus venosus.
  • Conduction bundle which links the sinus node and AV node was found by Wilhelm His Jr in 1893.
  • In 1906, Sunao tawara assumed that a tissue present at the proximal end of the his bundle was the beginning of an electrical conducting system, which proceeded from the AV node through the bundle of His, separated into the bundle branches, and ended up as the Purkinje fibers.
  • In the same year Flack and Keith made first observation of the mammalian sinoatrial node (SAN).

References

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