EntityQ2126472· pop 8· linked from 16 articlesstring galvanometerSign in to saveinstrument that provided the first practical electrocardiogramConnectionssilverEntityarrowEntityWayback MachineEntityquartzEntityNobel Prize in Physiology or MedicineEntityelectromagnetic fieldEntityLeiden UniversityEntityWillem EinthovenEntityoscilloscopeEntitygalvanometerEntityelectromagnetEntityelectrocardiographyEntityelectrometerEntityAndré BlondelEntitycommemorative publicationEntityThomas LewisEntityEinthoven's triangleEntityCategoriesCardiologyDutch inventionsElectrophysiologyGalvanometersMedical testsObsolete scientific instruments