Simply having chest tightness for three hours is not enough to determine whether it is angina or not, and it can be caused by other reasons as well.
Typical symptoms of angina are pain in the precordial area or behind the sternum when you are tired or agitated. If the chest tightness with chest pain spreads to the shoulders, arms, back, teeth or jaw, it may be angina. Generally angina will last a few minutes or ten minutes, rarely more than a few hours, chest tightness lasting three hours is not necessarily caused by angina.
To clarify whether chest tightness is caused by angina pectoris, it is necessary to go through routine electrocardiogram, dynamic electrocardiogram, coronary artery CT imaging and other methods to make a clear judgment, and not simply based on a symptom.
Some people who stay in places with poor air circulation for a long time may experience persistent chest tightness. If you go to a place with high altitude, your body is in a state of oxygen deficiency, and you may also feel chest tightness.
Some people with myocardial ischemia, abnormal left heart function, arrhythmia and other conditions may experience chest tightness. Some people with chronic obstructive pulmonary disease (COPD), which affects breathing due to problems in the chest cavity and thorax, can also experience chest tightness.
If episodes of chest tightness are frequent or persistently unrelieved, it is recommended to seek prompt medical attention and follow the doctor’s instructions for active treatment.