Heart failure is heart failure, the performance of heart failure in 90 year olds may have dyspnea, limitation of physical activity and fluid retention, etc. Depending on the location of the heart failure, the clinical manifestations of patients with left heart failure and right heart failure may be somewhat different. Heart failure is a syndrome of circulatory dysfunction caused by diastolic or systolic dysfunction of the myocardium in the presence of adequate venous return and insufficient cardiac output to maintain the metabolic needs of the tissues. Any factor that damages the myocardium or interferes with the heart’s ability to pump blood can lead to heart failure. It is common in primary myocardial diastolic dysfunction, cardiac overload, and diastolic limitation of the heart. 1. Left heart failure: patients mainly show the syndrome caused by pulmonary circulation stasis and reduced cardiac output. Including exertional dyspnea, sitting breathing, nocturnal paroxysmal dyspnea and cough, cough pink foamy sputum, hemoptysis and other acute pulmonary edema manifestations. Sometimes due to the reduction of cardiac output, to the control of tissue and organ perfusion is insufficient, appear tiredness, fatigue, physical decline and drowsiness, irritability and mental symptoms. 2. Right heart failure: patients mainly manifested as obstruction of venous return of the body circulation caused by various organs bruising and hypoxia as the main clinical signs, such as long-term gastrointestinal bruising caused by loss of appetite, nausea, vomiting, etc.; hepatic bruising caused by distension of the epigastric abdomen, abdominal pain, etc.; renal bruising caused by decreased urine output, increased nocturia, proteinuria and renal hypoplasia, etc.. There may also be symptoms of exertional dyspnea. Feeling unwell, patients should not blindly diagnose or treat themselves, they should go to the hospital in time, under the guidance of the doctor for clear diagnosis and treatment.