This has to be judged comprehensively based on the following conditions: First, the age factor. If it occurs in young people, dilated cardiomyopathy tends to be more severe. This is because dilated cardiomyopathy is an organic heart disease, and myocardial ischemia in young people may not necessarily involve organic heart disease changes, but could also be normal physiological changes in the electrocardiogram. Second, whether there is concurrent cardiac function impairment. Dilated cardiomyopathy definitely involves impairment of the heart's pumping function, whereas myocardial ischemia does not necessarily involve such impairment. Therefore, in most cases, dilated cardiomyopathy is more serious.