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Classification and external resources
ICD-10 E87.7
ICD-9 276.6

Hypervolemia, or fluid overload, is the medical condition where there is too much fluid in the blood.

The opposite condition is hypovolemia, which is too little fluid volume in the blood.



This fluid, primarily salt and water, builds up in various locations in the body and leads to an increase in weight, swelling in the legs and arms (peripheral edema), and / or fluid in the abdomen (ascites). Eventually, the fluid enters the air spaces in the lungs, reduces the amount of oxygen that can enter the blood, and causes shortness of breath (dyspnea). Fluid can also collect in the lungs when lying down at night, possibly making nighttime breathing and sleeping difficult (paroxysmal nocturnal dyspnea).


Fluid overload can be caused by many reasons, including problems with the heart, kidneys, or lungs or a combination of any of these vital organs. Fluid overload can also be experienced after certain surgical operations. Congestive heart failure is the most common result of fluid overload.

Volume overload can be a transfusion reaction. [1]

See also


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