It is an indisputable fact that all kinds of diabetic complications are trying to attack us all the time since our body is weak in resistance. Even though we have no way to stop the metabolic disorders of our own organism, we still need to understand the causes of the disease and pay attention to the general knowledge of diabetes, why are sugar lovers prone to coronary heart disease? Diabetes common sense: the high incidence of sugar lovers, when we see the incidence of 26%-35% of our hearts can not help but a shock. The survey shows that the prevalence of coronary heart disease in diabetic patients is three times higher than that in non-diabetic patients. From the viewpoint of pathological changes, the pathological changes of coronary heart disease complicated by diabetes are basically the same as those of non-diabetic patients with coronary heart disease, but the number of branches involving coronary artery lesions is larger, the degree of stenosis is also heavier, and myocardial infarction is more likely to occur; from the viewpoint of clinical manifestations, the clinical manifestations of coronary heart disease complicated by diabetes are similar to those of coronary heart patients without diabetes, and angina pectoris, acute myocardial infarction, heart failure and arrhythmia can occur, but there are The incidence of diabetic coronary artery disease increases with age and disease duration, but is not related to the severity of the disease, and decreases with the degree of control of diabetes. This may be related to the autonomic imbalance and reduced cardiac stability that comes with diabetic neuropathy. Diabetic cardiomyopathy is a heart disease caused by diabetic myocardial microangiopathy. Due to myocardial microvascular wall thickening and lumen narrowing, the myocardium can have extensive ischemia, degeneration, necrosis and fibrosis. Myocardial metabolic disorders and hypocardial function. The symptoms of cardiac insufficiency may appear early, especially in female patients with hypertension, and the heart may have mild enlargement, panic and shortness of breath, and angina pectoris. In severe cases, acute heart failure, shock, arrhythmia and even sudden death may occur. Clinically, it is often not easy to distinguish coronary heart disease. Diabetic patients often have cardiac phytonadic dysfunction, which is characterized by reduced heart rate variability, manifested as increased heart rate at rest, little change in activity, the difference in heart rate during deep breathing is also reduced, the acceleration reflex of the heart rate is weakened when rising quickly from the prone position, fast and fixed tachycardia is often the main manifestation of diabetic cardiac autonomic neuropathy. About 40-60% of long-term diabetic patients have reduced heart rate variability. In diabetic patients who die of acute myocardial infarction, autopsy may reveal a decrease in the number of cardiac autonomic fibers and often segmental pyknotic or orbicular thickening changes that predispose them to sudden death due to severe arrhythmias. Therefore, examining the heart rate variability of patients and paying attention to the common sense of diabetes can be helpful in judging their cardiac autonomic function, which can be used to guide the treatment to prevent the occurrence of serious arrhythmias, and can also be used as a reference indicator for judging the condition and preventing the occurrence of diabetic complications of coronary heart disease in a timely manner.