AJ PHOTO / SCIENCE PHOTO LIBRARY AJ PHOTO / SCIENCE PHOTO LIBRARY
Electrocardiography. Doctor with a print-out of a 45-year-old man's electrocardiogram (ECG). The ECG has been obtained with the electrodes that are attached to the patient's chest (upper centre) to measure the electrical activity of his heart. An ECG examination can help diagnose a range of heart complaints, such as arrhythmia, coronary artery disease and cardiac asthma. Photographed at the American Hospital of Paris, France.
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