Try to keep your child as quiet as possible, avoid excessive crying, and ensure adequate sleep. Older children should live a regular life, combining movement and stillness. Neither should they run around outside (running and jumping and strenuous exercise are strictly prohibited), nor should they lie in bed all day. Sleep at night must be guaranteed 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 sufficient 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. Follow up with the cardiology clinic regularly and take medications, especially cardiac and diuretic drugs, in strict accordance with medical advice. 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, pulse count should be measured. 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, it is important to prevent colds, develop the habit of brushing teeth 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.