Congestive heart failure can affect many organs. For example: The weakened heart muscle may not be able to deliver enough blood to the kidneys, which in turn begin to lose their normal ability to excrete salt and water. This can cause decreased kidney function in the body to retain more fluid. The lungs can become clogged with fluid and the ability of the person to take down. The fluid can also accumulate in the liver, which hinders their ability to rid the body of toxins and produce essential proteins. The intestines can become less efficient in absorbing nutrients and drugs. The fluid can also accumulate in the extremities, causing swelling of the ankles and feet. http://www.insideheart.com