Heart failure: Heart failure causes edema because they heart cannot pump the blood delivered to it. This inability to pump the blood allows the blood to pool in some areas of the body and the ankles are one of them. Others include the abdomen and sacrum.
Answered 6/12/2019
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Heart and kidneys: In the patient with congestive heart failure, the body senses that the heart is not working correctly. It sends a message the kidneys to hold onto salt and water that the patient eats and drinks. This excess salt and water builds up and becomes apparent in the legs, belly, and lungs.
Answered 9/22/2016
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