Introduction & Objective: Myocardial infarction (MI) is one of the most important causes of mortality in human communities today. MI can disable patients, and moreover it imposes financial burden on society. Therefore, regarding to the effect of some variables in the trend of the disease, we tried to determine a 5 year survival rate for patients with MI and assess the effect of some factors on it in Bushehr port.

Materials & Methods: In this retrospective cohort study, 197 patients suffering from myocardial infarction for the first time and admitted in Bushehr hospitals during "1997-2001" were evaluated. The patients were followed up for 5 years and the relationship between their survival rate and factors such as patient's age at the time of MI, their sex and what time MI happened was evaluated.

Results: The mean 5 year survival time for the patients after the first myocardial infarction was approximately 53.7 months (53.5 for men, 54.4 for women p>0.05). In this study, only age of the patients had a significant relationship with their survival rate (P=0.018). The study showed that mortality rate in hospitalized patients in the first 28 days, one year and 5 years after myocardial infarction were 1%, 8.6% and 13.7% respectively. MI in Bushehr port mostly occurred in fall and summer respectively. The study indicated that MI mostly happened in the early morning.

Conclusion: In this study, the 5 year survival rate of patients (86.3%) was higher than that of patients in other studies.