What is Congestive Heart Failure, CHF?
It does not mean the heart has stopped working. Rather, it means that the heart’s pumping power is weaker than normal. With heart failure, blood moves through the heart and body at a slower rate, and pressure in the heart increases. As a result, the heart cannot pump enough oxygen and nutrients to meet the body’s needs. The chambers of the heart may respond by stretching to hold more blood to pump through the body or by becoming stiff and thickened. This helps to keep the blood moving, but the heart muscle walls may eventually weaken and become unable to pump as efficiently. As a result, the kidneys may respond by causing the body to retain fluid (water) and salt. If fluid builds up in the arms, legs, ankles, feet, lungs, or other organs, the body becomes congested, and congestive heart failure is the term used to describe the condition.
Symptoms of heart failure are often due to “congestion,” but in some cases of moderate to severe systolic heart failure, symptoms can be due to the weak heart (or weak pumping action) without the presence of “congestion.”