SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Enlarged heart. Coloured X-ray of the chest of a 46-year-old woman with cardiomegaly (an enlarged heart). The heart is the blue mass at lower right. Cardiomegaly can be symptomless and is often only detected on a chest X-ray. Cardiomegaly is often a response to excessive strain, such as obesity or a weakening of the heart muscle (cardiomyopathy), leading to heart failure. It can be treated with drugs and, as a last resort, a heart transplant.
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