MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Heart disease. Computer artwork of a man holding his hand up to an ECG (electro- cardiogram) trace showing an irregular and falling heartbeat. An ECG heart trace measures the pumping of the heart as a series of small and larger waves. These waves correspond to the electrical activity of heart muscle during contraction and relaxation. This measurement is an important means of diagnosing heart diseases like coronary artery disease, thrombosis, cardiac arrhythmia and heart attack.
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