This question mainly emphasizes the precursors of heart attack, and the so-called 1 heat, 2 pain, 3 more, should be the law summarized by some people, there is a certain deviation, the key to this deviation is “heat”. The so-called “heat” is actually wrong, should be referred to as “sweating” “heat” in the clinic refers to increased body temperature, and before the sudden heart attack, the patient will not appear the phenomenon of increased body temperature, but the vast majority of patients may have a pale face, but the majority of patients may not be able to see. However, the majority of patients may appear pale and sweaty, but the sweating here is not caused by high body temperature; instead, the patient may feel cold in the limbs. Some people will say “Dr. Luo, you are wrong, heart attack patients will have fever”, indeed, but there are some subtle differences, the fever is before the onset of infarction, that is, the precursor symptoms of infarction, and in the clinical infarction patients have fever mainly in the late stage, which may be accompanied by tachycardia, and the fever is mostly low, so it should not be used as an indicator. Most of the fever is low, so it should not be used as a reference. The “pain” is real, but it is not as simple as two! Pain in the precordial area is the most typical symptom of a heart attack, and most people call it chest pain. It is a dull, squeezing, tightly constricting pain that lasts for hours or a day or two, compared to angina pectoris that lasts for less than 1-15 minutes. In addition to chest pain, patients may also have sore throat, upper abdominal pain, toothache, etc., so simply two pains does not represent the occurrence of heart attack, not to mention that due to the differences in individual physique, some patients with heart attack may not have any symptom until the condition is sudden, this kind of patients is not uncommon in the clinic, which is called “asymptomatic myocardial ischemia, asymptomatic myocardial infarction, etc.”, if the patient is too much, it will be very difficult for the patient to have a heart attack. These patients are not uncommon in the clinic, and we call them “asymptomatic myocardial ischemia, asymptomatic myocardial infarction, etc.” If the patients are too superstitious about the so-called “inherent law”, they are likely to delay the condition, miss the optimal time for treatment, and jeopardize their lives. The meaning of “more” is more ambiguous, and every doctor’s opinion is different. I think it means that the frequency of attacks becomes more frequent! As one of the clinical manifestations of coronary heart disease, heart attack and angina pectoris are very similar, but the danger is very different, angina pectoris is the most typical and common clinical manifestations, compared to the heart attack, both the degree of pain, the pain time is more intense, and can be relieved by sublingual nitroglycerin, and before the onset of infarction, the patient will obviously feel their angina (chest pain) attacks become more frequent, and also time Obviously longer, usually fast-acting nitroglycerin does not seem to work, I think this is the true meaning of “more”, rather than more symptoms. Since these three points are not clearly defined, it is difficult to have a fixed explanation, and we can only consider them through experience. Therefore, I suggest that we take a comprehensive and systematic view of heart attack, and we really need to understand these laws, but we must not apply them rigidly, just as I said above, some people have different physical qualities, and they may have lower pain valves, which makes it impossible for them to sense pain in time, and they may have a better collateral circulation, which makes it difficult for them to develop symptoms due to ischemia. At this time, if you are still staring at the symptoms to guess, it is likely to be dangerous, so I suggest that everyone: once chest pain, if the nitroglycerin effect is not obvious, don’t leave it to chance, please call 120 emergency immediately.