With congestive heart failure, the heart's capacity to pump blood cannot keep up with the body's need. As the heart weakens, blood begins to back up and force liquid through the capillary walls. The term “congestive” refers to the resulting buildup of fluid in the ankles and feet, arms, lungs, and/or other organs.
Why does fluid accumulate in heart failure?
When you have heart failure, your heart does not pump out enough blood. This causes fluids to build up in your body. If you drink too many fluids, you may get symptoms such as swelling, weight gain, and shortness of breath.
How do you get rid of fluid from congestive heart failure?
The current in-hospital treatment for CHF involves removal of excess fluid with diuretic medication and/or ultrafiltration in which a machine bypasses the kidneys and filters water and salt from the body. However, these treatments can have unwanted side effects such as low blood pressure and worsening kidney function.
Why does a person with congestive heart failure retain water?
As the heart starts to fail, renal perfusion falls. The kidneys respond by increasing the production of renin, leading to more aldosterone production, which is consequently followed by sodium and water retention.
Why does fluid back up in the lungs with congestive heart failure?
Pulmonary edema is often caused by congestive heart failure. When the heart is not able to pump efficiently, blood can back up into the veins that take blood through the lungs. As the pressure in these blood vessels increases, fluid is pushed into the air spaces (alveoli) in the lungs.
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