The absence of angina does not indicate that the coronary arteries are patent, which may be caused by less severe stenosis or lower myocardial oxygen consumption, etc. Specific causes need to be analyzed.
Angina pectoris is a clinical symptom caused by insufficient blood supply to the coronary arteries resulting in acute, transient ischemia and hypoxia of the myocardium, with clinical manifestations of pressure pain in the retrosternal or precordial region. When the degree of coronary artery stenosis is less than 50%, clinical symptoms such as angina may not appear, and the degree of stenosis is greater than 75% will appear obvious ischemic symptoms.
Angina can be avoided by avoiding behaviors that aggravate myocardial oxygen consumption, such as overexertion or emotional excitement, so that when coronary artery stenosis is present, low myocardial oxygen consumption may not result in clinical symptoms.
Symptoms of angina pectoris, should promptly go to the hospital, improve the relevant examination, under the guidance of the doctor symptomatic treatment.