Congestive heart failure (CHF) occurs when the heart is not able to pump blood effectively. Fluid can build up in the tissues of the body as a result of congestive heart failure. This type of heart failure could be due to a number of heart conditions. Symptoms include congested lungs, shortness of breath, water retention, dizziness, and weakness. Treating CHF may include medications, fluid restriction, exercise, surgery, and more. Follow the links below to find WebMD's comprehensive coverage about how congestive heart failure is caused, how to treat it, and much more.