Hidden coronary heart disease is not easy to be noticed by the “killer”, patients usually asymptomatic, they do not know has been sick, but when excessive smoking, drinking, overwork, excitement will appear cardiac arrest, so that people are caught off guard. And on this basis caused coronary artery embolism, resulting in a large area of myocardial necrosis, and even lead to sudden death. For this reason, how to find the traces of asymptomatic hidden coronary heart disease, for early prevention and treatment measures is very important. Cardiology experts remind, hidden coronary heart disease should be early attention, so as to avoid serious consequences later. In recent years, the incidence of occult coronary heart disease is on the rise. Especially in the middle-aged and elderly people, the prevalence of which usually asymptomatic people amounted to 79.4%. These people in the quiet time to do electrocardiogram examination, there are abnormal phenomenon less than 1/3. so, in the quiet time electrocardiogram is normal people do not necessarily not have coronary heart disease, if necessary, should be done to induce the test. Because coronary heart disease is generally asymptomatic, so most people do not take precautions, and even as usual to do those things beyond their physical strength and energy, so it is easy to go wrong. Many surveys also show that about 50% of the elderly patients with coronary heart disease have no symptoms, and even myocardial infarction occurred only when the onset of angina pectoris found typical symptoms, only to do electrocardiograms found in the heart have abnormal changes. This is due to the deformation of coronary artery sclerosis, resulting in the destruction of the pain nerve of the blood vessel wall, although the lesion is serious, but they are unaware of it. There are also elderly people due to the weakening of the body’s ability to respond, increased nociception, decreased sensitivity, coupled with the pain is short and mild, so it failed to cause the patient’s attention. Many patients do not pay much attention to a reasonable lifestyle and do not undergo active treatment, and even myocardial infarction occurs without realizing it, which can easily lead to sudden death. Asymptomatic hidden coronary heart disease patients are not really asymptomatic, but ignore or misunderstand the symptoms related to coronary heart disease, or symptoms are not typical. Only by mastering the medical knowledge related to this disease, it is easy to find the clues of myocardial ischemia. Ectopic pain] is an important manifestation of hidden coronary heart disease symptoms and is often overlooked because it is far from the heart. This type of pain most often appears in the dental bed, left shoulder arm or upper abdomen, followed by the throat, fingers or wrists, neck, back, and even radiate to the distal lower extremities. These pains are apparently unrelated to coronary artery disease, but in fact they are closely related. Although the pain site is different, but mostly due to emotional excitement, fatigue and other reasons for triggering, paroxysmal. Taking general painkillers is ineffective, but taking nitroglycerin drugs can be relieved. Fatigue】Patients mostly show fatigue without any explanation, often with palpitations, cold sweat, lowered blood pressure, insomnia and other symptoms, and in severe cases, they don’t even have the strength to straighten their backs after activities. [Stomach discomfort] It is characterized by a feeling of stuffiness and fullness with dull pain, heartburn or a feeling of nausea, vomiting, loss of appetite, hiccups, some of which are relieved after bowel movement, but most of which do not disappear completely. [Dyspnea] Severe dyspnea occurs on exertion or even during quiet rest, or paroxysmal dyspnea occurs at night. It is characterized by shortness of breath, elongated breathing, and even breathlessness, which is relieved by sitting still for a few minutes, but when standing up again and walking around, wheezing will appear again immediately. [Other abnormalities] In the hours, days, or even weeks before a heart attack, the body experiences abnormal sensations, such as indescribable tightness in the chest, dizziness, irritability, impaired movement of the limbs, sudden confusion or transient loss of consciousness, and even sudden shock. In short, any of the above abnormalities should cause the patient to be highly vigilant, timely cardiac examination, so as to avoid misdiagnosis and loss of time for treatment.