What is non ST segment elevation myocardial infarction?
summary
Unstable angina pectoris, non ST segment elevation MI and ST segment elevation Q wave MI are collectively referred to as acute coronary syndrome. All of them have similar pathophysiological basis. The differences lie in the different development degree and speed of related artery thrombosis, the different time of thrombolysis and the different degree of collateral circulation. These are of great significance in determining the extent of final necrosis, the amount of residual damaged myocardium and the change of left ventricular function. Let's share my experience with you.
What is non ST segment elevation myocardial infarction?
1. Non ST segment elevation MI with history of MI and angina pectoris is more common than ST segment elevation MI. 2. The complications of AMI are more common in ST segment elevation Mi than in non ST segment elevation MI. 3. The infarct size of non ST segment elevation MI is smaller than that of ST segment elevation MI.
4. The infarct extension of non ST segment elevation MI was significantly more than that of ST segment elevation MI. 5. Infarct pericarditis is more common in ST segment elevation Mi than in non ST segment elevation MI. 6. The incidence of post infarction angina pectoris in non ST segment elevation MI was significantly higher than that in ST segment elevation mi (35% - 50% vs 18% - 30%).
7. The positive pre discharge exercise test of non ST segment elevation MI was 2 times higher than that of ST segment elevation MI. These characteristics suggest that there is residual myocardium in non ST segment elevation MI.
matters needing attention
In the treatment of non ST segment elevation MI, the classic antithrombotic drugs aspirin and heparin, as well as the anti myocardial ischemic drugs nitrates, heparin, aspirin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin, heparin β Receptor blockers and calcium antagonists have become routine drugs. In the absence of contraindications, it should be considered for all patients β Intravenous administration is preferred for high-risk patients. β The target heart rate of oral administration of receptor blockers ranged from 50 to 60 beats / min. Yes, I have taken nitrates and β In patients with receptor blockers, calcium antagonists can relieve symptoms; yes β Calcium antagonists are useful in patients with contraindications to blockers and variant angina pectoris. Nifedipine or other dihydropyridine drugs should not be used at the same time.
