CHD is the most common cause of heart disease and is the single most important cause of premature death in developed world. Recognizing a patient with ACS is important because the diagnosis triggers both triage and management. cTnI is 100% tissue-specific for the myocardium and it has been shown to be a very sensitive and specific marker for AMI. Ventricular function is the best predictor of death after an acute coronary syndrome. It serves as a marker of myocardial damage, provides information on systolic function as well as diagnosis and prognosis. The study aimed at investigating the impact of elevated Troponin-I level on severity of LV systolic dysfunction in patients with first attack of NSTEMI. This cross-sectional analytical study was conducted in the department of cardiology in Mymensingh Medical College Hospital from December, 2015 to November, 2016. Total 130 first attack of NSTEMI patients were included considering inclusion and exclusion criteria. The sample population were divided into two groups: Group-I: Patients with first attack of NSTEMI with LVEF: 55%, Group-II: Patients with first attack of NSTEMI with LVEF: 55%.Then Troponin-I and LVEF levels were correlated. ukryj opis