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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 ...
In 1909, the American pathologist Lydia DeWitt created the first 3D wax model of the conduction system, using Tawara’s description as a guide. [10] In 1911, the British cardiologist Thomas Lewis reviewed the auriculo-ventricular connection system and described Tawara's discoveries in Das Reizleitungssystem des Saugetierherzens as the "main ...
He always made time to help others with their problems, and, even in periods of discouragement during his long final illness, his advice and counsel were readily available and freely given. Although Dr. Wilson's life was dedicated primarily to electrocardiography he had many other interests and hobbies.
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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 ...
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However, Einthoven needed an exact way of measuring the minute amounts of current. In 1897 a French electrical engineer, Clement Ader, invented the "string galvanometer", containing a tensioned string of quartz. In 1903, Einthoven modified Ader's machine, adding electrodes attached to the patients limbs and thorax.
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