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Impact of volume status on blood pressure and left ventricle structure in patients undergoing chronic hemodialysis

Yener Koc1, Abdulkadir Unsal, Hasan Kayabasi

  • 1Department of Nephrology, Sisli Etfal Research and Educational Hospital, Istanbul, Turkey. dryenerkoc@mynet.com

Renal Failure
|May 3, 2011
PubMed

Insights

Increased fluid volume in hemodialysis patients significantly worsens blood pressure and left ventricular mass index. Managing interdialytic weight gain and ultrafiltration is crucial for reducing cardiac complications in chronic hemodialysis.

Area of Science:

  • Nephrology
  • Cardiology
  • Hypertension

Background:

  • Volume status significantly impacts cardiovascular health in patients undergoing chronic hemodialysis (HD).
  • Left ventricular hypertrophy (LVH) is a common complication in HD patients, associated with increased morbidity and mortality.
  • Understanding the relationship between volume status, blood pressure (BP), and left ventricular mass index (LVMI) is critical for optimizing patient care.

Purpose of the Study:

  • To investigate the effect of volume status on blood pressure (BP) and left ventricular mass index (LVMI) in patients with chronic hemodialysis (HD).
  • To identify predictors of left ventricular hypertrophy (LVH) in the HD population.

Main Methods:

  • A cohort of 74 chronic hemodialysis patients were assessed for volume status (normovolemic vs. hypervolemic).
  • Data collected included demographics, biochemical tests, hemogram, C-reactive protein, interdialytic weight gain (IDWG), ultrafiltration (UF), and intradialytic complications.
  • Blood pressure was monitored using 24-hour ambulatory BP monitoring (ABPM), and left ventricular mass index (LVMI) was determined via echocardiography.

Main Results:

  • Hypervolemic patients exhibited a higher prevalence of valvular damage and significantly more left ventricular hypertrophy (LVH) (91.7%) compared to normovolemic patients (55.3%).
  • LVMI positively correlated with IDWG, UF, and various BP measurements (predialysis, postdialysis, daytime, and nighttime).
  • Increased IDWG, UF, and elevated BP were identified as independent predictors of LVH in HD patients.

Conclusions:

  • Elevated volume status in hemodialysis patients contributes to increased interdialytic weight gain and higher blood pressure.
  • These factors, in turn, lead to significant increases in left ventricular mass index and LVH.
  • Managing fluid balance through control of IDWG and UF is essential for mitigating cardiovascular risk in HD patients.

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