This study was conducted in three tertiary hospitals in Dhaka city at Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka Medical College Hospital (DMCH) and National Institute of Cardiovascular Disease (NICVD) as a part of Inter-Heart Study. Secondary data was obtained from the standard questionnaires to determine door to needle time (DNT) following thrombolytic therapy in patients with Acute Myocardial Infarction (AMI) in coronary care units at three large tertiary referral hospitals in Dhaka city.