ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Heart monitoring. The electrodes attached to his chest are used 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. The patient has previously suffered a transient ischaemic attack (TIA, or 'mini stroke'). Photographed at the Western General Hospital stroke unit, Edinburgh, UK.
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