NT-proBNP as Marker of Ventricular Dilatation and Pulmonary Regurgitation After Surgical Correction of Tetralogy of Fallot: A MRI Validation Study

Annalisa Paolino, Tarique Hussain, Antonio Pavon, Maria Nieves Velasco, Sergio Uribe, Antonio Ordoñez, Israel Valverde

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The goal of this study is to evaluate whether NT-proBNP plasma levels may help as a screening biomarker for monitoring right ventricular dilatation, pulmonary regurgitation and the onset of heart failure in patients with repaired Tetralogy of Fallot. Our single-centre observational prospective study involved 43 patients (15.1 years, SD = 8) with corrected Tetralogy of Fallot. Data collection included: clinical parameters (electrocardiogram, chest X-ray, NYHA scale, time since last surgery), biochemistry (NT-proBNP levels) and MRI values (ventricular volumetry, pulmonary flow assessment). Mean time since last surgery was 13.5 years (SD = 7.8). There was a statistically significant correlation between the NT-proBNP levels (187.4 pg/ml, SD = 154.9) and right ventricular dilatation for both the right ventricular end-diastolic volume (124.9 ml/m2, SD = 31.2) (Pearson = 0.19, p < 0.01) and end-systolic volume (56.1 ml/m2, SD = 18.8) (Pearson = 0.21, p < 0.01) and also with the pulmonary regurgitation fraction (36.5%, SD = 16, Pearson = 0.12, p < 0.01). No significant correlation was found between NT-proBNP and right ventricular ejection fraction (54.6%, SD = 10.6, Pearson = −0.07), left ventricular ejection fraction (59.9%, SD = 7.1, Pearson = −0.18) or any clinical parameters. The receiver operating curve analysis evidenced that a NT-proBNP cut-off value above 133.2 pg/ml predicted the presence of dilated right ventricular end-diastolic and end-systolic volumes over centile 95 (sensitivity 82 and 83% and specificity 93 and 79%, respectively). In conclusion, in patients with surgically corrected Tetralogy of Fallot, NT-proBNP levels correlate with right ventricular dilatation and the degree of pulmonary regurgitation. Ambulatory determination of NT-proBNP might be an easy, readily available and cost-effective alternative for MRI follow-up evaluation of these patients.

Original languageEnglish (US)
Pages (from-to)324-331
Number of pages8
JournalPediatric Cardiology
Volume38
Issue number2
DOIs
StatePublished - Feb 1 2017

Keywords

  • Congenital heart disease
  • Magnetic resonance imaging
  • NT-proBNP
  • Tetralogy of Fallot

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Cardiology and Cardiovascular Medicine

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