Aortic to brachial pulse pressure amplification as functional marker and predictor of renal function loss in chronic

Siegfried Wassertheurer1, Klaus Burkhardt, Uwe Heemann

  • 1Health & Environment Department, AIT Austrian Institute of Technology, Vienna, Austria; Department of Analysis and Scientific Computing, Vienna University of Technology, Vienna, Austria.

Insights

Pulse pressure amplification (PPA) is reduced in chronic kidney disease (CKD) patients and predicts worsening renal function. Low PPA indicates a higher risk of renal endpoints in advanced CKD.

Area of Science:

  • Cardiovascular physiology
  • Nephrology
  • Arterial function

Background:

  • Pulse pressure amplification (PPA) is an indicator of large artery function.
  • The role of PPA in the progression of chronic kidney disease (CKD) is not fully understood.
  • CKD affects cardiovascular health, and understanding arterial function is crucial.

Purpose of the Study:

  • To assess the association between PPA and CKD progression.
  • To determine if PPA predicts renal endpoints in patients with CKD stages 2-4.
  • To investigate the relationship between PPA, renal function decline, and renal outcomes.

Main Methods:

  • Longitudinal study of 128 CKD patients (stages 2-4) and 89 controls over 42 months.
  • Measurement of PPA and estimated glomerular filtration rate (eGFR).
  • Cox regression analysis to identify predictors of renal endpoints (50% eGFR loss or renal replacement therapy).

Main Results:

  • CKD patients exhibited reduced PPA compared to controls.
  • Lower PPA was associated with a faster decline in renal function.
  • PPA, eGFR, and proteinuria were significant predictors of renal endpoints.
  • Patients with stage 4 CKD and low PPA had the highest risk of renal endpoints.

Conclusions:

  • PPA is diminished in CKD patients and correlates with declining renal function.
  • Low PPA is a significant predictor of adverse renal outcomes, particularly in advanced CKD.
  • Systolic blood pressure is a key determinant of PPA in the context of CKD.

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