Firstly, the most common symptoms when coronary heart disease occurs include chest pain, especially in cases of severe myocardial infarction, which manifests as intense precordial pain. However, chest pain is not always indicative of coronary heart disease. For example, the development of chest pain centers currently underway in our country is intended to differentiate the nature of these chest pains. Therefore, the significance of establishing these chest pain centers lies in the fact that there are various causes of chest pain, many of which pose serious threats to life. For instance, common conditions such as aortic dissection may also present with chest pain. Similarly, pulmonary embolism, particularly acute pulmonary embolism, can cause symptoms like chest oppression and chest pain, which are not related to coronary heart disease. The establishment of chest pain centers is to distinguish these cases, hence it's important to note that not all chest pains are indicative of coronary heart disease.