Try to keep your child quiet, avoid excessive crying, and ensure adequate sleep. Older children should have a regular life, combining movement and stillness, neither running around outside (running and jumping and strenuous exercise are strictly prohibited), nor do they need to lie in bed all day, and sleep must be guaranteed at night to reduce the burden on the heart. Children with cardiac insufficiency tend to sweat more, so they need to keep their skin clean, bathe regularly in summer, rub themselves with hot towels in winter (pay attention to keeping warm), and change their clothes and pants regularly. Feed more water to ensure adequate hydration. Keep the stool smooth, if the stool is dry and difficult to defecate, excessive force will increase the abdominal pressure, increasing the burden on the heart, and may even have serious consequences. The child should eat less and more meals, ensure sufficient intake of protein and vitamins, and give as diverse and easily digestible diet as possible. Keep air circulation in the room and avoid crowded public places to reduce the chance of respiratory infection. Add and remove clothes in time with the weather and pay close attention to the prevention of colds. Regular follow-up visits to the cardiology clinic of the hospital and strict compliance with medical prescriptions, especially for cardiac and diuretic drugs, due to their pharmacological properties, the dosage must be absolutely controlled and taken on time and according to the course of treatment to ensure their efficacy. Before each dose of cardiac drugs, the pulse count should be measured, and if the heart rate is too slow, the drug should be stopped immediately to prevent toxic effects from occurring and endangering the child’s life. For children who need to wait for surgery due to age or other factors, pay attention to prevent colds, develop brushing habits and maintain oral hygiene. Tooth decay and tonsillitis should be actively treated when found. If there is a prolonged fever that does not subside, consult a physician early and avoid strenuous physical activities to avoid increasing the burden on the heart and lungs.