Non-ST elevation myocardial infarction (NSTEMI) is a relatively complex type of myocardial infarction, characterized by chest pain symptoms and elevated troponin levels. However, some patients initially diagnosed with suspected NSTEMI are found not to have severe stenosis upon coronary angiography. Recent studies have shown that initial imaging examinations (including CTA and CMR) in suspected NSTEMI patients can help reduce the need for coronary angiography. The diagnostic value of CT perfusion (CTP) has been established in patients with stable coronary artery disease, but relevant studies have not yet been conducted in suspected NSTEMI patients. This study aims to explore the diagnostic and therapeutic value of an initial CTP strategy for suspected NSTEMI patients. Additionally, we will conduct a cardiovascular health questionnaire to investigate the impact and prognostic value of factors such as adverse lifestyle and inflammation levels in these patients.