Heart failure combined with pulmonary edema can be life-threatening if not treated aggressively, so it is important to seek medical attention, give treatment, and not panic. When heart failure causes pulmonary edema, the patient’s life may be in danger within a few hours. Once heart failure progresses to the stage of pulmonary edema, it is important to seek prompt medical attention and active correction, and many recover well. If not aggressively corrected hypoxemia may occur, and severe hypoxemia can lead to carbon dioxide retention in later stages with life-threatening consequences. When heart failure pulmonary edema occurs should seek medical attention in a timely manner, actively under the guidance of the doctor, timely cooperation with the doctor for treatment, daily life to strengthen the management.