If the patient is 19 years old when there is myocardial ischemia, the first thing to find out the cause of myocardial ischemia, such as whether it is because of the recent always stay up late to play the phone, or stay up late to play the computer this kind of situation, the myocardial ischemia, from time to time to rest is not good, too tired, can lead to the 19-year-old patients with myocardial ischemia. There are some children’s school pressure is relatively large, the mental burden is relatively large, can also secondary cause myocardial ischemia. In addition, we can’t rule out the possibility of pathological causes, such as whether it is due to anemia or hypothyroidism, hyperthyroidism, obesity, congenital heart disease, myocarditis and other diseases, which can also cause myocardial ischemia in 19-year-old patients. It is important to identify the cause in such patients, and further initial screening with routine blood tests, thyroid function, cardiac ultrasound, and electrocardiogram can be performed.