Once the symptoms of myocardial infarction appear, it is important to go to the hospital in time to clarify the coronary stenosis as well as the extent and location of myocardial infarction based on ECG, cardiac ultrasound, coronary CT and coronary angiography. In case of myocardial infarction, heart stents can be placed because emergency heart stent implantation is also a very effective treatment for myocardial infarction. In addition, thrombolytic therapy can be performed within 6 hours of myocardial infarction, using urokinase and streptokinase to dissolve the blood clot in the blood vessel by IV or push. Both of these tests can help to relieve the symptoms of myocardial infarction, and postoperative coronary dilation and anticoagulation medications are also needed to restore the body to health faster.