Effects of Cinacalcet and Parathyroidectomy on Blood Pressure in Maintenance Hemodialysis Patients with Secondary Hyperparathyroidism

Introduction. Secondary hyperparathyroidism may cause an increase in blood pressure among maintenance hemodialysis (MHD) patients. The objective of this study were to observe the effects of different treatment modalities of hyperparathyroidism on blood pressure among MHD patients with secondary hyperparathyroidism. Methods. This retrospective cohort study was conducted on 69 patients divided into three groups, based on the therapeutic strategies (parathyroidectomy, n = 22; cinacalcet, n = 14; calcitriol, n = 33). Changes in systolic blood pressure (SBP) and diastolic blood pressure (DBP) from pre- to post-treatment visits at 1st, 3rd , 6th and 12th month were analyzed by mixed-effects repeated-measures model. Serum levels of the renin-angiotensin system (RAS) mediators (renin and aldosterone), endothelin, and echocardiography were compared before and after one year of treatment within the three groups. Results. Changes in blood pressure were significantly different among the three groups (SBP: P for group < 0.05; DBP: P for group < .05; both P for group x time interaction < .05). SBP and DBP showed a significant downward trend in the surgery group (P for change in SBP < .05, P for change in DBP < .001, adjusted mean change of SBP = -12.16 (-19.70 to -4.62) mmHg and of DBP = -6.82 (-10.58 to -3.06) mmHg in the surgery group on the 12th month). Diastolic BP showed a significant upward trend in the cinacalcet group (P for change in DBP < .05, adjusted mean change of DBP = 6.03 (2.08 to 9.98) mmHg in cinacalcet group in the 12th month). No significant change in BP was observed in the calcitriol group. The levels of serum RAS mediators, endothelin, or cardiac ultrasonography didn't change and almost remained consistent during the treatment course. Conclusion. Blood pressure decreased significantly over a year in patients with parathyroidectomy, while DBP increased significantly over time by cinacalcet treatment.

Automated summary

This study observed the effects of different treatment modalities on blood pressure in MHD patients with secondary hyperparathyroidism. The results showed that parathyroidectomy significantly reduced blood pressure, while cinacalcet treatment significantly increased diastolic blood pressure.