Causes of cardiac insufficiency include overwork, hypovolemia, vascular obstruction, and poor circulation. 1. Overwork: prolonged overwork can lead to increased blood consumption and myocardial ischemia and insufficient blood supply to the heart. It leads to cardiac insufficiency. 2. Hypovolemia: If the body is in an ischemic state, it will also lead to cardiac insufficiency and corresponding discomfort. 3. Vascular obstruction: blockage of blood vessels supplying blood to the heart can also lead to cardiac insufficiency. Patients should pay attention to scientific diet and should not eat high-fat or high-sugar food, so as not to lead to thrombosis and deterioration of the condition. 4. Poor blood circulation: Poor blood circulation will lead to insufficient blood supply to the heart and symptoms of cardiac insufficiency. Don’t eat too much spicy, stimulating, high-fat and greasy food, exercise actively, keep good mood, etc. If the symptoms of insufficient heart power last for a long time, it is recommended to seek medical treatment in time.