The string galvanometer developed by Willem Einthoven in 1901 allowed physicians to measure the heart's electrical activity through the chest wall for the first time. This innovation transformed cardiac diagnostics by providing a reliable method to record electrical currents despite the resistance offered by flesh and bone, eventually earning the inventor a Nobel Prize.
Academic Foundation
Born in 1860 in Semarang, Dutch East Indies, Einthoven moved to the Netherlands with his family in 1870. He pursued his medical education at Utrecht University, where he earned his doctorate. In 1886, he commenced a lengthy tenure at Leiden University that lasted until his death in 1927. His administrative contributions included serving as rector magnificus between 1905 and 1906.
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Before his breakthrough, doctors could not accurately measure cardiac electrical output without direct contact with the heart. Einthoven's string galvanometer utilized a thin conductive filament suspended between powerful electromagnets. When currents passed through, the filament deflected, casting a shadow onto moving photographic paper to create a continuous curve. The original iteration was substantial, weighing 270 kilograms, requiring five operators, and needing a water-cooling system for the magnets.
Clinical Legacy
Einthoven established the fundamental terminology still employed in modern electrocardiography. He designated the P, Q, R, S, and T deflections used to read heart rhythm. Additionally, he defined Einthoven's triangle, an imaginary equilateral formation centered on the chest that maps the standard placement of electrodes on the limbs. These metrics allowed for the systematic identification of various cardiovascular disorders.
Professional Recognition
The scientific community acknowledged his contributions through various memberships and awards, including the Royal Society, the Royal Netherlands Academy of Arts and Sciences, and the German Academy of Sciences Leopoldina. He received the Nobel Prize in Physiology or Medicine in 1924 for discovering the mechanism of the electrocardiogram. Following his death in 1927, he was buried in Oegstgeest.
Fast facts
- Born: 1860, Semarang
- Died: 1927, Leiden
- Education: Utrecht University
- Key Invention: String galvanometer
- Nobel Prize: Physiology or Medicine, 1924
- Employment: Leiden University (1886-1927)
- Burial location: Oegstgeest
- National Inventors Hall of Fame: 2008
Questions readers ask
What is Einthoven's triangle?
It is an imaginary inverted equilateral triangle centered on the chest, formed by the points of standard electrodes on the arms and leg.
What award did Willem Einthoven receive?
He was awarded the Nobel Prize in Physiology or Medicine in 1924.
Achievements
- Nobel Prize in Physiology or Medicine — 1924
- Held posts at Leiden University
- Fields: physiology
