Co-relation Between Calcium-Phosphorus Product and Hypertension in End-Stage Renal Disease Patients

Faiza Anser1, Murtaza Dhrolia1, Kiran Nasir1

  • 1Nephrology, The Kidney Centre Hospital, Karachi, PAK.

Cureus
|November 25, 2021
PubMed

Insights

The calcium-phosphorus product and high phosphorus levels are linked to blood pressure changes in hemodialysis patients. This association was observed for systolic, diastolic, and mean arterial pressure, but not pulse pressure.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Clinical Chemistry

Background:

  • Maintaining mineral and bone disorder balance is crucial in hemodialysis (HD) patients.
  • The calcium-phosphorus (Ca-P) product is a key indicator of mineral metabolism.
  • Elevated Ca-P product is associated with cardiovascular complications in chronic kidney disease.

Purpose of the Study:

  • To investigate the relationship between the Ca-P product and pre- and post-dialysis blood pressure (BP) parameters in HD patients.
  • To determine the independent effect of serum calcium, phosphorus, and parathyroid hormone on BP.
  • To identify potential markers for BP management in HD populations.

Main Methods:

  • Prospective, observational, cross-sectional study.
  • 111 patients undergoing maintenance HD for over six months were enrolled.
  • Linear regression analysis was used to assess correlations between Ca-P product and BP parameters (SBP, DBP, MAP, pulse pressure).

Main Results:

  • The Ca-P product showed strong correlations with pre-dialysis diastolic BP (0.7) and post-dialysis mean arterial pressure (0.7).
  • Moderate correlations were found with systolic BP and mean arterial pressure, both pre- and post-dialysis.
  • Serum phosphorus levels, independently, significantly correlated with systolic BP, diastolic BP, and mean arterial pressure.

Conclusions:

  • A significant association exists between the Ca-P product and pre- and post-dialysis blood pressure (SBP, DBP, MAP) in hemodialysis patients.
  • Elevated serum phosphorus levels independently impact blood pressure parameters in this cohort.
  • The Ca-P product and serum phosphorus are not associated with pulse pressure variations.

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