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Background: It is assumed giving oxygen to patients with acute myocardial infraction may increase the oxygenation of the ischemic tissue; however, the usefulness of oxygen in these patients has become a challenging topic. Thus, the present study aimed to determine the effect of oxygen inhalation on cardiac biomarkers in patients with acute myocardial infarction. Methods: This randomized clinical trial study was performed on 2 groups of intervention and control within 2 days of admission to critical care unit (CCU). A total of 64 patients with ST-segment elevation acute myocardial infarction who referred to Zeyaei hospital, Ardakan, were selected using simple random sampling. In the intervention group, the pulse oximetry was monitored and they only breathed regular air and received supplemental oxygen in case their oxygen level dropped below 94%. The levels of creatine kinaseMB and troponin I enzymes were measured. Data were analyzed using SPSS version 20 through repeated measure ANOVA, t test, and chi-squared test. Significance level was set at 0.05. Results: This study showed that during the 48 hours of hospitalization, there were no significant differences between the 2 groups regarding the levels of creatine kinase-MB (p=0.509) and troponin I (p=0.604). Conclusion: Since the level of cardiac biomarkers is a sign of the extent of infracted area, it is assumed receiving supplemental oxygen in patients with acute myocardial infarction has no effect on decreasing the infracted area.

the medical journal of the islamic republic of iran

The effect of oxygen inhalation on cardiac biomarkers in patients presenting with acute ST-segment elevation myocardial infraction: A randomized clinical trial