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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.
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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.