How long you can live with left heart failure varies depending on the patient’s condition and the patient’s health, and can be days or decades. Left heart failure, caused by left ventricular compensatory insufficiency due to myocardial damage, cardiac overload, cardiac preload insufficiency, etc., patients may have dizziness, dyspnea, coughing, fatigue, panic attacks, oliguria, and other clinical manifestations. Patients with acute left heart failure or acute attack of chronic left heart failure can die within days due to ischemia and hypoxia of various tissues and organs if they are not treated timely and effectively. Acute left heart failure through oxygen, the use of furosemide, metoprolol and other timely and effective treatment, or chronic left heart failure patients adhere to the standardization of captopril, metoprolol and other drugs, while paying attention to the regular work and rest, avoiding fatigue, and other lifestyle modification, can survive for several years to decades. When symptoms of left heart failure such as dyspnea appear, effective treatment should be carried out in time to improve the prognosis and prolong the life expectancy, so as not to delay the condition.