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Plasma adrenomedullin relation with Doppler-derived dP/dt in patients with congestive heart failure

Maria-Aurora Morales1, Silvia Del Ry, Umberto Startari

  • 1Cardiology and Cardiovascular Biochemistry Laboratory, CNR Institute of Clinical Physiology, Pisa, Italy. morales@ifc.cnr.it

Clinical Cardiology
|April 7, 2006
PubMed

Insights

Increased adrenomedullin (AM) levels correlate with left ventricular (LV) dysfunction severity in heart failure (HF) patients. This finding may help characterize HF progression independently of ejection fraction.

Area of Science:

  • Cardiology
  • Biomarkers
  • Heart Failure Research

Background:

  • Elevated circulating adrenomedullin (AM) is linked to heart failure (HF).
  • AM is a potential biomarker for cardiac dysfunction.

Purpose of the Study:

  • To investigate the association between AM levels and left ventricular (LV) function in HF patients.
  • To evaluate AM as a marker for LV dysfunction severity using echo-Doppler methods.

Main Methods:

  • Measured plasma AM, B-type natriuretic peptide (BNP), and N-terminal proBNP in 55 HF patients and 20 controls.
  • Calculated dP/dt (rate of pressure rise) from mitral regurgitation jet Doppler tracings.
  • Assessed patients across NYHA functional classes I, II, and III.

Main Results:

  • AM levels were significantly higher in HF patients than controls and increased with NYHA class.
  • dP/dt showed a stronger correlation with AM (r=0.582) than with BNP or NT-proBNP.
  • AM levels differed significantly based on dP/dt cut-offs predicting event-free survival.

Conclusions:

  • Increased AM, combined with reduced contractility, may help characterize LV dysfunction severity in HF.
  • AM's predictive value appears independent of baseline LV ejection fraction.
Abstract

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