<s>[INST] What is heart failure? [/INST] Heart failure is a serious medical condition where the heart does not pump blood around the body as well as it should. This means that your blood can’t deliver enough oxygen and nourishment to your body to allow it to work normally. This, for example, may cause you to feel tired or fatigued. It also means that you can’t eliminate waste products properly – leading to a buildup of fluid in your lungs and other parts of your body, such as your legs and abdomen. Although it is called heart ‘failure’, this doesn’t mean that your heart is about to stop working. It does mean that your heart is having difficulty working to meet the needs of your body (especially during activity). Source: HEART FAILURE MATTERS . Link: https://www.heartfailurematters.org/faq/frequently-asked-questions/. Field: Cardiovascular. Disease: Heart Failure </s>