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A Concise History of the ECG: Difference between revisions
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==1895 - 1949== | ==1895 - 1949== | ||
[[image:Einthoven_portrait.jpg|thumb|150px|left|Willem Einthoven]][[Image:einthoven.jpg|150px|left|thumb|Willem Einthoven]][[image:Einthoven_ECG2.jpg|thumb|150px|right|Einthoven's ECG recording including putting the patients feet in baths filled with saline to improve electrical conduction]] | [[image:Einthoven_portrait.jpg|thumb|150px|left|Willem Einthoven]][[Image:einthoven.jpg|150px|left|thumb|Willem Einthoven]][[image:Einthoven_ECG2.jpg|thumb|150px|right|Einthoven's ECG recording including putting the patients feet in baths filled with saline to improve electrical conduction]][[Image:Einthoven_ECG.jpg|thumb|150px|An electrocardiograph as used by Einthoven]][[Image:Einthoven_ECG3.jpg|thumb|150px|ECG recordings as registered by Einthoven]] | ||
[[Image:Einthoven_ECG.jpg|thumb|150px|An electrocardiograph as used by Einthoven]] | |||
'''1895''' Einthoven, using an improved electrometer and a correction formula developed independently of Burch, distinguishes five deflections which he names P, Q, R, S and T. <cite>Einthoven2</cite> | '''1895''' Einthoven, using an improved electrometer and a correction formula developed independently of Burch, distinguishes five deflections which he names P, Q, R, S and T. <cite>Einthoven2</cite> | ||
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'''1949''' Montana physician Norman Jeff Holter develops a 75 pound backpack that can record the ECG of the wearer and transmit the signal. His system, the Holter Monitor, is later greatly reduced in size, combined with tape / digital recording and used to record ambulatory ECGs. <cite>Holter</cite> | '''1949''' Montana physician Norman Jeff Holter develops a 75 pound backpack that can record the ECG of the wearer and transmit the signal. His system, the Holter Monitor, is later greatly reduced in size, combined with tape / digital recording and used to record ambulatory ECGs. <cite>Holter</cite> | ||
== 1950 - to date== | == 1950 - to date== | ||