[Metformin and changes in blood pressure and heart rate in lean patients with polycystic ovary syndrome (PCOS)--preliminary study].

INTRODUCTION The aim of our study was to assess the value of blood pressure and heart rate using the 24-hour blood pressure monitoring (ABPM) before and after treatment with metformin to patients with polycystic ovary syndrome (PCOS) and normal lean. MATERIAL AND METHODS 5 patients received metformin 1500 mg per day in three divided doses. ABPM was performed to each patient with PCOS twice: before and after 6 months of treatment with metformin. RESULTS In patients with PCOS and normal lean after treatment with metformin we observed: statistically significant lower systolic blood pressure (120.2 ± 22.33 mmHg vs 113.22 ± 21.43 mm Hg, p = 0.0248); lower systolic blood pressure of daily measurements (127.1 ± 32.13 mmHg vs 116.1 ± 22.08 mmHg, p = 0.0062); reduction in average arterial pressure MAP in the measurement of the day (95.52 ± 22.76 mmHg vs 88.36 ± 16.41 mmHg, p = 0.048); oscillometric pressure reduction (96.27 ± 27.93 mmHg vs 87.82 ± 21.61, p = 0.0004 mmHg); oscillometric pressure reduction of daily measurements (102.1 ± 27.93 mmHg vs 91.85 ± 21.61 mmHg, p = 0.0032); oscillometric pressure reduction in the measure- ment of the night (88.81 ± 24.85 mmHg vs 82.22 ± 20.54 mmHg, p = 0.0089). In women after treatment with metformin has also been observed higher average heart rate (65.82 ± 13.48 / min vs. 70.71 ± 16.04 min; p < 0.01). The calculations included 500 measurements. CONCLUSION Treatment with metformin in patients with PCOS and normal lean leads to lower blood pressure and increases the frequency of heart rate.