Basics: Difference between revisions

Jump to navigation Jump to search

Basics (view source)

Revision as of 01:15, 6 May 2009

2,493 bytes removed ,  6 May 2009
m
→‎The history of the ECG
Line 84: Line 84:


==The history of the ECG==
==The history of the ECG==
[[Image:Einthoven.gif|thumb|[[w:Einthoven|Willem Einthoven (1860-1927), the founder of the current ECG]]]]
A [[A_Concise_History_of_the_ECG| concise history of the ECG]] is presented in a different chapter.
[[Image:einthECG1.png|thumb|ECG from Eindhoven's first publication. ''Pfügers Archiv March 1895, page 101-123'']]
[[Image:stringgalvanometer.jpg|thumb|Einthoven's string-galvanometer, now in the Science Museum in Londen. The patient had to put his hands in salt baths to which the electrodes were connected. ''Image from the [http://www.ieee.org/portal/cms_docs_iportals/iportals/aboutus/history_center/conferences/che2004/Landman.pdf IEEE history society]''.]]
[[Image:modern_ecg.jpg|thumb|The last generation of ECG equipment. Image courtesy of [http://www.gehealthcare.com/euen/cardiology/ General Electric]]]
The history of the ECG goes back more than one and a half century
 
In '''1843''' Emil Du Bois-Reymond, a german physiologist, was the first to describe "action potentials" of muscular contraction. He used a highly sensitive galvanometer, which contained more than 5 km of wire. Du Bios Reymond named the different waves: "o" was the stable equilibrium and he was the first to use the p, q, r and s to describe the different waves. <cite>Dubois</cite> However, in his excellent paper on the 'Naming of the waves in the ECG' Dr Hurst credits Einthoven for being the first to use PQRS and T.<cite>Hurst</cite>
 
In '''1850''' M. Hoffa described how he could induce irregular contractions of the ventricles of doghearts by administering electrical shock. <cite>Hoffa</cite>
 
In '''1887''' the English physiologist Augustus D. Waller from Londen published the first human electrocardiogram. He used a capillar-electrometer. <cite>Waller</cite>
 
[[w:Einthoven|The dutchman Willem Einthoven]] (1860-1927) introduced in 1893 the term 'electrocardiogram'. He described in '''1895''' how he used a galvanometer to visualize the electrical activity of the heart. In 1924 he received the Nobelprize for his work on the ECG. He connected electrodes to a patienta showed the electrical difference between two electrodes on the galvanometer. We still now use the term: Einthovens'leads. The string galvanometer (see Image) was the first clinical instrument on the recording of an ECG.
 
In 1905 Einthoven recorded the first 'telecardiogram' from the hospital to his laboratoy 1.5 km away.
 
In 1906 Einthoven published the first article in which he described a series of abnormal ECGs: left- and right bundlebranchblock, left- and right atrialdilatation, the U wave, notching of the QRS complex, ventricular extrasystoles, bigemini, atrialflutter and total AV block. <cite>Einthoven</cite>
{{clr}}
{{clr}}


Retrieved from "https://en.ecgpedia.org/index.php?title=Special:MobileDiff/8769"

Navigation menu