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Background: Permanent pacemakers are applied to treat some 2nd and 3rd degree AV blocks. Previous studies have shown the hemodynamic changes that may occur after pacemaker implantation. In this study, we have evaluated these hemodynamic changes from a different view point, with measurement of urinary sodium and blood pressure. Materials and Methods: This is a before and after clinical trial study in which 30 patients, who were hospitalized for permanent pacemaker implantation for the first time in Tehran heart center during 3 years, including 12 women (mean age 62.92 years) and 18 men (mean age 60.07 years), were tested for urinary specific gravity and sodium, blood pressure, blood sodium and potassium, before and after pacemaker implantation. Paired sample T test and Chi Square test were used for statistical analysis. Results: Systolic blood pressure was 136.5 mmHg and 120.6 mmHg before and after pacemaker implantation, (P<0.001). Also, after pacemaker implantation, urinary sodium rose from 83.45 meq/L to 106.61 meq/L (p=0.018). Conclusion: This study is consistent with previous studies, which showed hemodynamic changes after permanent pacemaker implantation including decrease in blood pressure and elevation of serum neuropeptides.

Keywords: Permanent pacemaker, urinary sodium, blood pressure

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