Which Dutch physiologist won a Nobel Prize for inventing the first practical electrocardiogram (ECG) in 1903?
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Willem Einthoven designed the string galvanometer, which was sensitive enough to record the tiny electrical currents of the heart. His original machine was massive, weighing over 600 pounds and requiring several people to operate, yet it laid the foundation for modern cardiology. Photo: Unknown authorUnknown author, Wikimedia Commons, Public domain.
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Source: Wikipedia (CC BY-SA)
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