Your heart is a pump that pushes blood through your body. Sometimes, this pump weakens and isn\u2019t able to keep the blood flowing through your body as well anymore. This is called heart failure, or congestive heart failure. It doesn\u2019t mean your heart has stopped working, but rather that it doesn\u2019t work as well as it used to.\nHeart failure can happen when one or both sides of the heart become weaker. Your heart has two upper atria and two lower ventricles. Most people with heart failure have left-sided heart failure.\nCongestive Heart Failure\nCongestive heart failure means that the heart cannot pump enough blood to meet your body\u2019s needs. It is often the result of severe coronary artery disease.\nLeft-sided Heart Failure\nThe left side of the heart brings oxygen-rich blood from the lungs through the left atrium to the left ventricle, then out into your body. When the left side of your heart is damaged or can\u2019t pump as well, it has to work harder to send blood through your body.\nThis causes fluid to build up in your body, especially the lungs. That\u2019s why shortness of breath is one of the most common symptoms of heart failure.\nSystolic vs. Diastolic Heart Failure\nWith left-sided heart failure, you may have systolic or diastolic failure. Systolic failure happens when the heart doesn\u2019t pump out blood the way it should. Diastolic means the heart doesn\u2019t fill back up with blood as it should.\nTake This Quiz to Learn If Your Heart Failure Is Under Control\u00a0\nRight-sided Heart Failure\nThe right side of the heart usually becomes weaker in response to failure on the left side. The right side of the heart brings in the circulated blood from the body and sends it to the lungs for oxygen.\nWhen the left side of the heart weakens, the right side of the heart has to work harder to compensate. Again, as the heart muscle loses strength, blood and fluid become backed up in the body. You may experience swelling and trouble catching your breath.\nLifestyle changes such as quitting smoking, following a healthy diet, and exercising regularly are key to living with heart failure. Depending on the type of heart failure and causes behind it, your doctor may make different recommendations for medication, surgery, or implanted devices.\nRELATED:\u00a0Managing Heart Failure with Healthy Lifestyle\nTo learn more about heart failure diagnosis and management, visit the UPMC Advanced Heart Failure Center.