Circulating active serum calcium reduces the risk of hypertension

Area of Science:

• Cardiovascular Health
• Mineral Metabolism
• Epidemiology

Background:

• Calcium is a key mineral involved in numerous bodily functions, including potential roles in blood pressure regulation.
• The physiologically active form of serum calcium is ionized calcium, which may have specific implications for cardiovascular health.

Purpose of the Study:

• To investigate the association between active serum calcium levels and the future risk of developing hypertension.
• To determine if higher concentrations of ionized calcium are protective against incident hypertension.

Main Methods:

• A prospective cohort study involving 1562 normotensive men aged 42-61 years from the Finnish Kuopio Ischemic Heart Disease study.
• Active serum calcium was measured at baseline, and Cox proportional hazard models were used to analyze incident hypertension over a median follow-up of 24.9 years.

Main Results:

• A significant inverse association was observed between active serum calcium and the risk of developing hypertension.
• Each standard deviation increase in active serum calcium was associated with a reduced hazard ratio for hypertension (adjusted HR 0.82).
• Men in the highest quintile of active serum calcium had a substantially lower risk of hypertension compared to those in the lowest quintile (adjusted HR 0.54).

Conclusions:

• Active serum calcium demonstrates a protective effect against future hypertension in middle-aged Caucasian men.
• These findings highlight the potential role of ionized calcium in hypertension pathogenesis.
• Further research is warranted to confirm these results and elucidate the underlying mechanisms.