National High Magnetic Field Laboratory
Magnet Academy: Electrocardiograph 1903
If TV medical dramas have taught us anything, it's how to recognize the heart's characteristic peaks and valleys crawling across monitors in emergency rooms. These images represent the electrical activity of the beating heart as recorded...
National High Magnetic Field Laboratory
Magnet Academy: Willem Einthoven
Willem Einthoven invented a string galvanometer that lead to the electrocardiogram, which measures heart activity. For his discovery, Einthoven was awarded the Nobel Prize in Physiology or Medicine in 1924.