Chest pain is one of the most often reported symptoms in outpatient practise and poses a formidable diagnostic challenge. Patients in a stable condition who complain of chest pain may exhibit a variety of nonspecific symptoms and indications, posing a diagnostic problem. Our study's objective was to explore the relationship between the quantitative value of high-sensitivity troponin I (hsTnI) and the severity of coronary artery disease (CAD) in stable, symptomatic outpatients with suspected CAD undergoing coronary computed tomography angiography (CTA). Methods: Our research was done at a single location. This research was done on 250 patients with suspected CAD who came to the Cardiology department at Elahrar Teaching Hospital. regards age, gender, and risk factors, there was no difference between the groups tested. The high sensitivity troponin level was greater in group I, p 0.001. Increasing hs troponine levels were related with the existence of coronary artery disease in patients with stable chest discomfort.