The precursors of heart failure are clinically referred to as the condition of heart failure and cardiac insufficiency. In general, heart failure is divided into right heart failure, left heart failure, and total heart failure. The main manifestation of right heart failure is swelling of the lower extremities and low urine output. The main manifestation of left heart failure is shortness of breath. Most patients will have some aura, the main symptoms are weakness, poor performance, shortness of breath after activity, chest tightness or dizziness, headache, mental fatigue, and loss of appetite. Therefore, if a patient with chronic cardiac insufficiency develops these symptoms, it is important to consult a doctor in time and give timely treatment to avoid the onset of acute heart failure. In addition, there is another condition, if the patient has an irritating dry cough, dry cough caused by itchy throat, or cannot sleep flat at night, occasionally sitting up and gasping for air, this condition is also a precursor of heart failure aggravation. Therefore, if these conditions occur, it is important to seek medical attention from a specialist in a timely manner to avoid some of the adverse consequences of acute heart failure that may occur later.