LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY
Electrocardiography test. Paramedic at a general practice (GP) clinic carrying out an electrocardiography (ECG) heart test on a patient. An ECG is obtained by using electrodes to detect the electrical activity of the heart. The results can be used to diagnose a range of heart complaints. Photographed in Edinburgh, Scotland.
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