Background : Heart failure is a common condition worldwide and it is a frequent cause of hospitalisation. It is the only common cardiovascular disease increasing in prevalence and incidence. Five year mortality rates for this condition are as high as 50% and it is the most frequent cause and hospitalization in patients older than 65 years. Purpose : The purpose of the study is to investigate the prognostic value of admission high sensitivity troponins in patients with acute decompensated heart failure. Material and Methods : 100 consecutive patients with acute decompensated heart failure admitted to wards of DMCH, Laheriasarai, Bihar from September, 2017 to September, 2019 (20 months approximately). Results : In hospital mortality was higher in the hsTnT positive group(34.8%,n=23) than in negative group(8.8%,n=3). Death outside hospital was nil in troponin T negative patients but it was 9.1% in troponin positive group. Conclusion : The patients with troponin T positivity show higher mortality(both in hospital and outside) and recurrent hospitalization in comparison with troponin T negative patients. Duration of stay in hospital is higher for hsTnT positive patients when compared with troponin negative patients. NYHA class and ejection fraction changed in a negative direction in patients of ADHF who are troponin positive.