Electrocardiograms

Jun 16, 2025

Discover the fascinating history behind electrocardiograms, starting from an early Scottish engineer's breakthrough to the pivotal contributions of Willem Einthoven. Dive into the evolution of heart monitoring technology and its journey from experimental use to essential clinical practice. The impact of animal experimentation on medical advancements and personal stories add depth and humor to this enlightening discussion. Plus, enjoy a whimsical tale that lightens the mood amidst the intriguing medical insights!

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INSIGHT

Einthoven's ECG Wave Pattern

Einthoven identified five deflections in ECG waves and renamed them P, Q, R, S, and T.
This pattern is the basis for modern ECG readings.

INSIGHT

Early ECG Machine Challenges

The original string galvanometer ECG weighed over 660 pounds and occupied two rooms.
It required water cooling and five operators, limiting clinical use initially.

INSIGHT

Pioneering Telecardiogram Transmission

The first telecardiogram was transmitted over about a mile using telephone lines in 1905.
This innovation allowed remote ECG readings from hospital patients to lab equipment.

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The first electrocardiograph was invented in 1895. That device looked a lot different from today’s machines, and there are some other contenders for the title of “first.”

Research:

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Baldassarre, Antonio et al. “The Role of Electrocardiography in Occupational Medicine, from Einthoven's Invention to the Digital Era of Wearable Devices.” International journal of environmental research and public health vol. 17,14 4975. 10 Jul. 2020, doi:10.3390/ijerph17144975
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