Impaired endothelial function in patients with mild primary hyperparathyroidism improves after parathyroidectomy

Area of Science:

• Endocrinology
• Cardiovascular Medicine
• Vascular Biology

Background:

• Primary hyperparathyroidism (PHPT) is linked to increased cardiovascular disease risk.
• Reversibility of cardiovascular issues in mild PHPT remains unclear.
• Endothelial dysfunction is a key factor in cardiovascular morbidity.

Purpose of the Study:

• To evaluate endothelial function in mild PHPT patients.
• To assess changes in endothelial function after parathyroidectomy (Ptx).
• To compare outcomes with a control group and non-operated PHPT patients.

Main Methods:

• Prospective study of 53 mild PHPT patients and 46 controls.
• Endothelial function assessed via flow-mediated dilation (FMD) and carotid intima-media thickness (CIMT) using Doppler ultrasonography.
• Exclusion of patients with diabetes, coronary heart disease, renal impairment, thyroid disorders, or smoking history.

Main Results:

• Mild PHPT patients exhibited lower FMD and higher CIMT compared to controls (P < 0.001 and P = 0.045, respectively).
• These differences persisted even after excluding hypertensive individuals.
• Significant improvements in FMD and CIMT were observed 6-12 months post-Ptx.

Conclusions:

• Endothelial function is impaired in mild PHPT.
• Successful Ptx leads to significant improvement in endothelial function (FMD and CIMT).
• Ptx may reduce cardiovascular morbidity and mortality in mild PHPT patients.