Pre-myocardial infarction symptoms

Myocardial infarction generally refers to acute myocardial infarction, early symptoms of precordial pain, chest tightness, shortness of breath, etc.

1, precordial pain The

earliest symptoms of acute myocardial infarction are usually precordial pain, which occurs in the morning. It is considered to be related to myocardial ischemia, hypoxia, necrosis, abnormal excitation of cardiac autonomic nerves and stimulation of pain receptors. Generally, it can occur during rest and activity.

2, chest tightness

When myocardial blood supply is insufficient, patients may feel chest tightness or chest obstruction is not smooth.

3, shortness of breath

Some patients are also easy to feel breathing difficulties due to decreased alveolar ventilation function.