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Correlation between serial changes in left-sided heart chambers and atrial natriuretic peptide and N-terminal pro

J Svanegaard1, J B Johansen, N A Klitgaard

  • 1Department of Cardiology, Odense University Hospital, Denmark. svanegaard@dou.dk

Scandinavian Cardiovascular Journal : SCJ
|January 6, 2000
PubMed

Insights

Left atrial distension, not left ventricular dilatation, correlates with atrial natriuretic peptide (ANP) and N-terminal pro-ANP (NT-proANP) levels after myocardial infarction. Changes in left atrial size reflect changes in these peptide concentrations.

Area of Science:

  • Cardiology
  • Biochemistry
  • Medical Imaging

Background:

  • Left ventricular dilatation post-myocardial infarction is a known predictor of adverse outcomes.
  • Atrial natriuretic peptide (ANP) and N-terminal pro-ANP (NT-proANP) are biomarkers associated with cardiac stress.

Purpose of the Study:

  • To investigate the relationship between left atrial and ventricular dimensions and plasma levels of ANP and NT-proANP in the 6 months following a first myocardial infarction.

Main Methods:

  • Serial echocardiographic examinations of left atrial and ventricular dimensions.
  • Plasma measurements of ANP and NT-proANP at multiple time points post-infarction.
  • Correlation analysis between chamber dimensions and peptide levels.

Main Results:

  • Initially, ANP correlated with left atrial and ventricular sizes, while NT-proANP showed weaker correlations.
  • Over 6 months, left atrial size changes correlated strongly with both ANP and NT-proANP changes.
  • Left ventricular size changes showed less consistent correlation with peptide levels.

Conclusions:

  • Left atrial distension, rather than left ventricular dilatation, is primarily associated with ANP and NT-proANP concentrations post-myocardial infarction.
  • Changes in left atrial size serve as a more reliable indicator of natriuretic peptide dynamics after infarction.

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