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Relationship between biological variation in B-type natriuretic peptide and plasma renin concentration in stable

Keizo Nishiyama1, Takayoshi Tsutamoto, Chiho Kawahara

  • 1Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Japan.

Circulation Journal : Official Journal of the Japanese Circulation Society
|June 24, 2011
PubMed

Insights

Biological variation in B-type natriuretic peptide (BNP) in heart failure patients is linked to plasma renin concentration (PRC) variations. This suggests the natriuretic peptide system and renin-angiotensin-aldosterone system (RAS) interact, influencing BNP levels.

Area of Science:

  • Cardiology
  • Endocrinology
  • Biochemistry

Background:

  • Understanding B-type natriuretic peptide (BNP) variability in stable chronic heart failure (CHF) is crucial.
  • Distinguishing disease progression from biological variation in BNP levels is important for patient management.

Purpose of the Study:

  • To investigate the biological variation of BNP in outpatients with stable chronic heart failure (CHF).
  • To determine the relationship between BNP variation and factors of the renin-angiotensin-aldosterone system (RAS) in patients with dilated cardiomyopathy (DCM).

Main Methods:

  • Measured plasma BNP and RAS factors in 115 stable outpatients with DCM over two months.
  • Utilized stepwise multivariate analysis to identify factors related to BNP variation.
  • Correlated changes in hematocrit with changes in BNP and plasma renin concentration (PRC).

Main Results:

  • High biological variation in BNP was significantly associated with baseline BNP, atrial fibrillation, and high biological variation in PRC.
  • Hematocrit changes were negatively correlated with BNP changes and positively correlated with PRC changes.
  • No significant changes in body weight or blood pressure were observed during the study period.

Conclusions:

  • A significant relationship exists between biological variation in BNP and biological variation in PRC in stable DCM outpatients.
  • Physiological interactions between the natriuretic peptide system and the RAS likely contribute to plasma BNP variability.
  • These findings offer insights into the complex regulation of BNP in chronic heart failure.
Abstract

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