Symptoms of myocardial infarction?

summary

Myocardial infarction is myocardial necrosis caused by acute and persistent ischemia and hypoxia of coronary artery. Clinically, most patients have severe and persistent retrosternal pain, which can not be completely relieved by rest and nitrates, accompanied by increased serum myocardial enzyme activity and progressive ECG changes. They can be complicated with arrhythmia, shock or heart failure, and often life-threatening. Most people have different degrees of premonitory symptoms or precursor manifestations before myocardial infarction. To sum up, there are three main precursors of myocardial infarction

Symptoms of myocardial infarction?

The duration of angina pectoris was prolonged and the pain was aggravated. Previously, sublingual nitroglycerin was ineffective. These symptoms are acute coronary syndrome. Acute coronary syndrome (ACS) is caused by the rupture of atherosclerotic plaque, surface damage or cracks in the coronary artery, followed by bleeding and thrombosis, resulting in incomplete or complete occlusion of the coronary artery.

In the past, there was angina pectoris, but recently, the number of angina pectoris attacks has increased significantly. Even slight activities can cause angina pectoris, and even at rest. In other words, the number of angina pectoris will completely affect your daily normal work and life.

For people without angina pectoris symptoms, the first angina pectoris usually occurs after emotional excitement, excessive exertion or full meal, and the upper or middle sternal compression like pain, accompanied by chest tightness and suffocation. This is due to severe myocardial ischemia and hypoxia, excessive accumulation of metabolites, stimulation of cardiac autonomic nerve afferent fiber terminals, causing severe pain.

matters needing attention

There is also if there is persistent severe precordial depression, pain, no obvious reason for asthma, suddenly can not lie flat, pulse too fast, too slow or arrhythmia, blood pressure drop, sweating, etc. may be its precursor, to pay special attention to.