LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY
Electrocardiography test results and notes. Medical practitioner making patient notes with printed results (left) following an electrocardiography (ECG) heart test performed at a general practice (GP) clinic. 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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