Arterial stiffness, central blood pressures, and wave reflections in cardiomyopathy-implications for risk

Thomas Weber1, Johann Auer, Gudrun Lamm

  • 1Cardiology Department, Klinikum Kreuzschwestern Wels, Austria.

Insights

In systolic heart failure patients, lower central pulse pressure and augmentation index indicate worse outcomes, contrary to general cardiovascular risk associations. Arterial function measures are influenced by left ventricular performance.

Area of Science:

  • Cardiovascular physiology
  • Arterial biomechanics
  • Heart failure research

Background:

  • Pulse pressure (PP), augmentation index (AIx), and pulse wave velocity (PWV) generally correlate with cardiovascular risk.
  • However, in systolic heart failure, lower PP has been linked to poorer outcomes, suggesting a different relationship.

Purpose of the Study:

  • To investigate the relationship between arterial function measures (central PP, AIx, PWV) and left ventricular performance in patients with cardiomyopathy (CMP).
  • To compare these measures between CMP patients and healthy controls.

Main Methods:

  • Applanation tonometry was used to assess central PP and AIx in 63 CMP patients and 126 matched controls.
  • Aortic PWV was invasively measured in a subgroup of patients and controls.
  • Ejection fraction (EF) was assessed as a measure of left ventricular performance.

Main Results:

  • CMP patients had lower central PP and AIx compared to controls, despite similar age, gender, and brachial BP.
  • Ejection fraction was significantly lower in CMP patients (29.9%) versus controls (72.2%).
  • AIx was found to be an independent predictor of EF, and lower AIx values correlated with more advanced systolic dysfunction.

Conclusions:

  • Central PP and AIx are influenced by left ventricular performance, particularly in systolic heart failure.
  • Arterial stiffness measures like PWV may also be affected by ventricular function, contrary to general associations with cardiovascular risk.
Abstract

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