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Adrenal responses to subtotal parathyroidectomy for primary hyperparathyroidism
R Pacifici1, H M Perry, W Shieber
1Division of Bone and Mineral Metabolism, Jewish Hospital of St. Louis, Washington University School of Medicine, Missouri 63110.
Calcified Tissue International
|September 1, 1987
Summary
Primary hyperparathyroidism often causes hypertension. Parathyroidectomy (surgical removal of parathyroid glands) successfully lowered blood pressure and decreased adrenal steroid metabolites in patients, suggesting a link between calcium levels and blood pressure regulation.
Area of Science:
- Endocrinology
- Nephrology
- Cardiovascular Medicine
Background:
- Hypertension is frequently observed in primary hyperparathyroidism.
- The exact cause of elevated blood pressure in hyperparathyroidism remains unclear.
Purpose of the Study:
- To investigate the relationship between serum calcium, blood pressure, and adrenal cortical hormones in primary hyperparathyroidism.
- To assess the effects of parathyroidectomy on these parameters.
Main Methods:
- Analyzed serum calcium, blood pressure, and urinary adrenal steroid metabolites (aldosterone and Porter-Silber chromagens).
- Compared pre- and post-parathyroidectomy data in 10 normotensive and 6 hypertensive patients.
- Examined changes in aldosterone and chromagen levels separately in normotensive and hypertensive groups.
Main Results:
- Parathyroidectomy significantly reduced serum calcium and diastolic blood pressure in all patients.
- Urinary aldosterone and Porter-Silber chromagens decreased post-surgery in all subjects.
- Aldosterone decrease was significant in normotensive patients, while chromagen decrease was significant in hypertensive patients.
Conclusions:
- Surgical treatment for hyperparathyroidism effectively lowers blood pressure and serum calcium.
- A decrease in adrenal steroid metabolite excretion is associated with parathyroidectomy.
- Ionized calcium levels and steroidogenesis may be linked, contributing to blood pressure reduction after parathyroidectomy.