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Background  Delayed hospital presentation is a hindrance to the optimum clinical outcome of modern therapies of Myocardial infarction (MI). This study aimed to investigate the significant factors associated with prolonged pre-hospital delay and the impact of this delay on in-hospital mortality among patients with MI in Northern Bangladesh.    Methods  This cross sectional study was conducted in December 2019 in cardiology ward of a 1000-bed tertiary care hospital of Bangladesh. Patients admitted in the ward with the diagnosis of myocardial infarction were included in the study. Socio demographic data, clinical features and patients’ health seeking behavior was collected in a structured questionnaire from the patients. Median with interquartile range (IQR) of pre hospital delay were calculated and compared between different groups. Chi-square (χ 2 ) test and binary logistic regression were used to estimate the determinants of pre-hospital delay and effect of pre-hospital delay on in-hospital mortality.    Results  Three hundred thirty-seven patients was enrolled in the study and their median (IQR) pre-hospital delay was 9.0 (13.0) hours. 39.5% patients admitted in the specialized hospital within 6 h. In logistic regression, determinants of pre-hospital delay were patients age (for < 40 years aOR 2.43, 95% CI 0.73–8.12; for 40 to 60 years aOR 0.44, 95% CI 0.21–0.93), family income (for lower income aOR 5.74, 95% CI 0.89–37.06; for middle income aOR 14.22, 95% CI 2.15–94.17), distance from primary care center ≤5 km (aOR 0.42, 95% CI 0.12–0.90), predominant chest pain (aOR 0.15, 95% CI 0.05–0.48), considering symptoms as non-significant (aOR 17.81, 95% CI 5.92–53.48), referral from primary care center (for government hospital aOR 4.45, 95% CI 2.03–9.74; for private hospital OR 98.67, 95% CI 11.87–820.34); and not having family history of MI (aOR 2.65, 95% CI 1.24–5.71) (R2 = 0.528). Risk of in-hospital mortality was almost four times higher who admitted after 6 h compared to their counterpart (aOR 0.28, 95% CI 0.12–0.66); ( R  2  = 0.303).    Conclusion  Some modifiable factors contribute to higher pre-hospital delay of MI patients, resulting in increased in-hospital mortality. Patients’ awareness about cardiovascular diseases and improved referral pathway of the existing health care system may reduce this unexpected delay.

Pre-hospital delay in patients with myocardial infarction: an observational study in a tertiary care hospital of northern Bangladesh