How long a person can live with dilated cardiomyopathy grade 4 depends on how the patient is treated as well as the prognosis. The 5-year survival rate after diagnosis is about 50%, and the 10-year survival rate is around 25%. 1. Dilated cardiomyopathy that has progressed to grade 4 means that the situation is more serious, and the patient’s heart is likely to be significantly enlarged, but as long as it is handled in a timely manner and the patient receives active treatment, then the survival time can reach more than 5 years. 2. However, if the disease is allowed to develop, leading to heart failure and other problems, then the survival time will be drastically shortened, or even less than a year, and there is always a risk of losing one’s life. Therefore, during the treatment period, it is necessary to develop healthy eating habits, eat more light, easy-to-digest food, quit smoking and drinking in a timely manner, and avoid strenuous exercise. Drug treatment should be under the guidance of a professional cardiologist to develop an effective and appropriate treatment program, to improve heart function, improve the structural changes in the heart, such as following the doctor’s instructions to take bisoprolol and other drugs to slow down the progression of the disease. It is recommended that patients standardize their treatment under the guidance of their doctors and maintain an optimistic mindset to prolong their survival.