Heart blockage 30%-50% generally do not have clinical symptoms, if the activity level is large resulting in increased myocardial oxygen consumption may appear chest tightness, palpitations, chest pain and other symptoms.
1. Heart blockage refers to the narrowing or occlusion of the lumen of the coronary arteries caused by atherosclerosis. When the coronary artery lumen stenosis is 30%~50%, the blood supply of the coronary artery can meet the demand of myocardial blood supply, and there is usually no clinical symptom; however, when the activity is large, resulting in an increase in myocardial oxygen consumption, chest tightness, palpitation, chest pain and other symptoms may occur.
2. When there is a significant fixed stenosis (>50%~75%) in the coronary arteries, the quiet fashion can compensate for it, and when exercise, tachycardia, emotional excitement cause an increase in myocardial oxygen demand, it can lead to an imbalance between the myocardial oxygen supply and demand, which can lead to angina pectoris or myocardial infarction.
Coronary angiography can clarify the vascular lesions, if there is coronary artery stenosis, you need to regularly review the coronary angiography, cardiology specialties regular follow-up, if there is chest tightness, chest pain and other discomforts, you should immediately consult the doctor to avoid delay.