The full name of coronary heart disease is also called coronary atherosclerotic heart disease. From its name, we can see the basis of coronary heart disease, which is due to the formation of atherosclerotic plaques in the coronary arteries themselves, causing insufficient myocardial blood supply, and bringing about some symptoms. In the early stages, there may even be no symptoms. It is only when the narrowing of the coronary arteries reaches a certain degree, especially when it reaches 50%, or even more than 70%, that the patient may experience a series of symptoms. These symptoms include chest tightness and pain after activity, as well as radiating pain in other parts of the body, discomfort in the throat area, burning sensation behind the sternum, and even abdominal pain, among other symptoms. Additionally, some patients may also experience palpitations and discomfort in the precordial area, etc.