The symptoms of myocardial ischemia are: 1. When you are tired or nervous, you will feel dull pain behind the sternum or precordial area, or constrictive pain, which will radiate to your left shoulder and left upper arm for 3-5 minutes, and then feel relieved after rest, sometimes accompanied by sweating.

2. Chest tightness, palpitation and shortness of breath during physical activity will be relieved by themselves during rest.

3. Exercise-related sore throat, burning sensation, tension and toothache.

4. Chest pain and chest tightness after full meal, cold and drinking.

5. When sleeping on a low pillow at night, people who feel chest tightness and breathlessness need a high pillow position to feel comfortable; Those who suddenly have chest pain, palpitation and dyspnea when sleeping or lying flat during the day and need to sit up or stand up immediately to relieve them.

6. Palpitation, chest tightness, shortness of breath or chest pain during sexual life or forced defecation.

7. Sudden bradycardia, hypotension or syncope.

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