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Willem Einthoven (21 May 1860 – 29 September 1927) was a Dutch medical doctor and physiologist. He invented the first practical electrocardiograph (ECG or EKG) in 1895 and received the Nobel Prize in Physiology or Medicine in 1924 for it ("for the discovery of the mechanism of the electrocardiogram").
Graphical representation of Einthoven's triangle. Einthoven's triangle is an imaginary formation of three limb leads in a triangle used in the electrocardiography, formed by the two shoulders and the pubis. [1] The shape forms an inverted equilateral triangle with the heart at the center. It is named after Willem Einthoven, who theorized its ...
Dutch physiologist Willem Einthoven developed the string galvanometer in the early 20th century, publishing the first registration of its use to record an electrocardiogram in a Festschrift book in 1902. The first human electrocardiogram was recorded in 1887, however only in 1901 was a quantifiable result obtained from the string galvanometer.
While still a house physician, Lewis began physiological research, carrying out fundamental research on the heart, the pulse and blood pressure. From 1906, he corresponded with the Dutch physiologist Willem Einthoven concerning the latter's invention of the string galvanometer and electrocardiography, and Lewis pioneered its use in clinical ...
1887 – Willem Einthoven invents electrocardiography (ECG/EKG) [100] [101] 1890 – Emil von Behring discovers antitoxins and uses them to develop tetanus and diphtheria vaccines. 1895 – Wilhelm Conrad Röntgen discovers medical use of X-rays in medical imaging
MLA Style Manual, formerly titled MLA Style Manual and Guide to Scholarly Publishing in its second (1998) and third edition (2008), was an academic style guide by the United States–based Modern Language Association of America (MLA) first published in 1985. MLA announced in April 2015 that the publication would be discontinued: the third ...
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The resolution of the problem was completely unknown at the time, and 't Hooft was unable to provide one. In 1969, 't Hooft started on his doctoral research with Martinus Veltman as his advisor. He would work on the same subject Veltman was working on, the renormalization of Yang–Mills theories. In 1971 his first paper was published. [3]