Into the winter, the temperature plummeted, but also to the high incidence of cardiovascular disease period. The reporter learned from the cardiology department of Jiangsu Provincial People’s Hospital that many patients walk into the hospital, often first to do a coronary angiography. According to statistics, in the daily outpatient process, most patients with cardiovascular disease do not need a coronary angiography. Mr. Zhang has been feeling tightness in his chest for nearly a month, accompanied by a burst of pain in the precordial region, and wanted to go to the hospital to do a coronary angiography, but the experts suggested that he had better go for a “nuclear myocardial perfusion imaging” first. After the nuclear myocardial imaging, the doctor found that Mr. Zhang did have myocardial ischemia and diagnosed him with coronary artery disease, but since the ischemia was not extensive, he was advised to receive medication. Why not do coronary angiography directly? Li Xinli, director of the cardiology department of Jiangsu Provincial People’s Hospital, explained that there are still many people who believe that heart pain requires coronary angiography; many people believe that coronary angiography is the only means of diagnosing coronary heart disease, and that only coronary angiography is “safe”. But in fact, myocardial imaging is the most commonly used diagnostic evaluation method for coronary artery disease worldwide, especially in the United States. From a scientific and standardized point of view, most patients with clinically suspected or diagnosed coronary artery disease can clearly identify whether they have coronary artery disease and the severity of coronary artery disease through non-invasive tests like myocardial imaging, so that they can decide whether to receive medication or to undergo further invasive coronary artery imaging. coronary angiography. The patient is given an injection of imaging agent from a vein after exercising on a specific treadmill to a certain degree. Based on the results of this test, it is possible to diagnose whether the patient has coronary artery disease and which coronary artery is diseased, as well as to determine the severity of the patient’s coronary artery disease and whether the patient needs coronary angiography. Generally speaking, those with mild or moderate abnormalities in the nuclear myocardial image are suitable for drug treatment; those with severe abnormalities in the nuclear myocardial image are suitable candidates for invasive examination and treatment (or coronary artery bypass grafting). In clinical practice, taking coronary angiography as the only important diagnostic treatment for coronary artery disease will result in many missed diagnoses and misdiagnoses. Only the comprehensive and rational application of invasive and non-invasive tests such as ECG exercise test, nuclear myocardial imaging, stress ultrasound and coronary angiography can improve the clinical diagnosis and treatment of coronary artery disease.