Influence of age, race, sex, and body mass index on interpretation of midregional pro atrial natriuretic peptide for the diagnosis of acute heart failure: results from the BACH multinational study

Eur J Heart Fail. 2012 Jan;14(1):22-31. doi: 10.1093/eurjhf/hfr157. Epub 2011 Dec 2.

Abstract

Aims: Midregional pro atrial natriuretic peptide (MR-proANP) is useful for diagnosing acute heart failure (HF) in patients presenting to the Emergency Department with dyspnoea. Optimal interpretation of MR-proANP requires understanding of how various demographic variables influence its levels and performance as a diagnostic marker. We sought to determine how age, race, sex, and body mass index (BMI) affect the levels and interpretation of MR-proANP for the diagnosis of acute HF.

Methods and results: The Biomarkers in Acute Heart Failure (BACH) study was an international 15-centre study of 1641 patients presenting to the Emergency Department with acute dyspnoea. Of these, 1352 had complete information on age, race, sex, and BMI. MR-proANP levels increased with age and were higher in men and in patients with lower BMI. MR-proANP performed better as a diagnostic marker in younger individuals and in blacks compared with whites. Despite this, MR-proANP at the recommended cut-off point of 120 pmol/L was >90 % sensitive in ruling out the diagnosis of acute HF in all subgroups of patients except white subjects <50 years old.

Conclusion: Age, race, sex, and BMI affect MR-proANP levels to various degrees. However, the diagnostic performance of the recommended cut-off point of 120 pmol/L to rule out acute HF was robust across most subgroups. Although both sex and BMI affected MR-proANP levels, they did not alter its overall diagnostic performance. Lower cut-off points for MR-proANP could be considered in younger patients and in patients with a higher BMI, to optimize diagnostic sensitivity.

Publication types

  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acute Disease
  • Age Factors
  • Aged
  • Aged, 80 and over
  • Atrial Natriuretic Factor / blood*
  • Biomarkers
  • Body Mass Index
  • Continental Population Groups
  • Dyspnea / blood*
  • Dyspnea / diagnosis*
  • Dyspnea / physiopathology
  • Female
  • Heart Failure / blood*
  • Heart Failure / diagnosis*
  • Heart Failure / physiopathology
  • Humans
  • Male
  • Middle Aged
  • Predictive Value of Tests
  • Prospective Studies
  • Sex Factors

Substances

  • Biomarkers
  • Atrial Natriuretic Factor