Keywords: Willem Einthoven ECG.jpg In contrast to what the name of this file may suggest this picture does not represent the ECG machine built by Willem Einthoven and his team It shows an early commercial ECG machine built in 1911 by the Cambridge Scientific Instrument Company Christoph Zywietz A Brief History of Electrocardiography - Progress through Technology; S L Barron The development of the electrocardiograph in Great Britain British Medical Journal 1 720 25 March 1950 to measure the human electrocardiogram according to the standards developed by Einthoven http //en wikipedia org/wiki/Image Willem_Einthoven_ECG jpg PD-old PD-old ECG devices |