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Brain natriuretic peptide and left ventricular dysfunction in Chagas' disease

Antonio Luiz P Ribeiro1, Adelina Martha dos Reis, Marcio Vinicius L Barros

  • 1Postgraduate Course of Tropical Medicine, School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil. tom@hc.ufmb.br

Lancet (London, England)
|September 21, 2002
PubMed

Insights

Plasma brain natriuretic peptide (BNP) can effectively screen for left ventricular dysfunction in Chagas' disease patients. A BNP level of 60.7 pmol/L or higher identifies those needing further evaluation, aiding early intervention.

Area of Science:

  • Cardiology
  • Infectious Diseases
  • Biomarkers

Background:

  • Left ventricular dysfunction is a frequent complication of Chagas' disease.
  • Early detection of cardiac involvement is crucial for timely treatment and improved prognosis.
  • Current diagnostic methods may not always be sufficient for identifying all affected individuals.

Purpose of the Study:

  • To evaluate the utility of plasma brain natriuretic peptide (BNP) measurement in detecting left ventricular dysfunction in Chagas' disease.
  • To determine the optimal BNP concentration threshold for identifying patients requiring further investigation or treatment.

Main Methods:

  • The study included patients with Chagas' disease and abnormal electrocardiogram or chest radiograph findings.
  • Plasma BNP concentrations were measured.
  • Sensitivity, specificity, and predictive values were calculated for a specific BNP threshold.

Main Results:

  • A plasma BNP concentration of 60.7 pmol/L or higher demonstrated high diagnostic accuracy.
  • The threshold achieved 80% sensitivity and 97% specificity for detecting left ventricular dysfunction.
  • Positive and negative predictive values were 80% and 97%, respectively.

Conclusions:

  • Plasma BNP measurement is a valuable and accessible tool for screening Chagas' disease patients for left ventricular dysfunction.
  • This biomarker can help identify individuals who would benefit from further cardiac assessment and management.
  • BNP testing can streamline the diagnostic pathway for Chagas' disease cardiomyopathy.

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