History Of Electrocardiography

Running head : HISTORY OF electrocardiogramNameCollegeDateTransmission of cardiac pulse consider across specialized cardiac tissues [Sinoatrial nodeAtrioventicular node , Bundle of His (including the portion branches ) and Purkinje fibres] is responsible for(p) for initiating and maintaining rhythmic activity of sum total in class of symmetrical , successive contractions and relaxations (Shouldice sea bass , 2002 . Conduction of cardiac impulses is vital for square-toed functioning of the heart disturbances in this conducting ashes can pay off cardiac anomalies in signifier of arrhythmias (Shouldice Bass , 2002 . Two such arrhythmias (atrial fibrillations and ventricular tachycardia ) will be later described in this essay Measurement of bounteousness and duration of this galvanizing authorization is possible today wi th the function of a procedure c each(prenominal)ed elecrocardiography Electrocardigraphy yields a graphical representation of cardiac electrical activity in form of an ECG (electrocardiogramEven though Scientists like Waller , DuBois-Reymond , and Einthoven laid the al-Qaida ofmodern electrocardigraphy , which is done today , scientists all over the world had been conducting many another(prenominal) experiments all without 17th and18th centuries in to observe the outlet of electricity on animal tissues (Jenkins Gerred , 2001 . The purpose from 1800 to1903 witnessed the development of variant of small instruments which could detect the electrical impulses generated by the heart muscles . This widget was known as galvanometer at that quantify and formed the solid ground of modern day ECG machines . Emil Du bois-Reymond , a German physiologist in 1843 invented one of the most sensitive galvanometers of those days (Jenkins Gerred , 2001 . The prototypic man electrocardiog ram was obtained by a British physiologist A! .D waller in 1887 at London , utilise a capilliary electrometer . He was the first person to use the barrier `electrocardiogram . However he refuted the clinical significance of these recordings and cardiography did not become clinically relevant until 1903 (Shouldice Bass , 2002 . In 1903 , Dutch physiologist , William Einthoven constructed a geartrain galvanometer (as shown in throw .

1 ) which consisted of a fine silver-plated lechatelierite fit stretched between the poles goodly electromagnets (Shouldice Bass 2002 . The working of the galvanometer was establish on the principle that when electric current w ould be passed through the thin wire , the magnetic field would cause the wire to move . Movements of the draw would set down a shadow on the moving roll of photographic . Thus the movement of chain would be represented in form of a endless curve (as shown in figure 3 . This curve showed authentic waveforms which were characteristic of dissimilar regions of the heart through which cardiac impulse passed and simultaneously ca utilize their contraction . Einthoven besides suggested the terminology , Q , R , S , T , U for the various defections (waves ) obtained on the electrocardiogram (Shouldice Bass 2002 . Even though this string galvanometer weighed about 300 kg and required five operators , it was some(prenominal) more sensitive as compared to the capillary electrometer which had been previously used by Waller (Shouldice Bass , 2002 . Einthoven also described the electrocardiographic features of a number of cardiovascular offend In 1924 , he was awarded the Nobel plun der in Medicine for his baring (Shouldice...If you w! ant to get a full essay, order it on our website: BestEssayCheap.com

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