There is no exact time for how long an 80-year-old person can live with heart failure, but it is mainly related to the degree of heart failure, the severity of the underlying disease and the cause. Heart failure, also known as cardiac insufficiency, is a condition in which the systolic and diastolic functions of the heart are diminished, resulting in a number of symptoms dominated by cardiac insufficiency. If an 80-year-old person develops heart failure, he or she usually needs timely symptomatic treatment such as diuresis, cardiac strengthening and myocardial nutrition under the guidance of a doctor. For those with mild symptoms, the 5-year survival rate is usually no more than 50% after active treatment; if the condition is severe and not treated in time, the survival period will be relatively short. During the treatment process, 80-year-old elderly people with heart failure need to cooperate with doctors to closely monitor the changes of vital signs indicators, such as daily detection of blood pressure, heart rate, urine volume, weight changes, which is conducive to timely adjustment of the treatment plan and will help to prolong survival.