Diagnosis Technology

Electrocardiograph.

The electrocardiograph, an instrument designed to measure the electrical currents of the heart, was invented in 1924. Willem Einthoven was responsible for this new invention, which grew out of his work regarding the nature of heart action in disease as well as in health.

Unsatisfactory Instrumentation.

Einthoven at first attempted to measure these currents by using the Lipp-mann capillary electrometer and various other instruments Einthoven built to aid his research. He found the capillary electrometer to be severely restrictive, but he was able to develop a way to correct its limitations. Still not satisfied with the available instrumentation and frustrated by the time and labor required for the current mechanisms to be effective, he searched for another means of recording the electrical currents attending the heartbeat.

A New Invention.

The string galvanometer was Einthoven's...

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