Abstract:
BACKGROUND:Natriuretic peptides are considered as reliable indicators of left-heart failure (HF) and are useful for differential diagnosis of dyspnoea. AIM:We evaluated the clinical significance of N-terminal pro-brain natriuretic peptide (NT-proBNP) in patients with chronic hypercapnic respiratory failure (CHRF). METHODS:In 60 patients with CHRF, plasma concentrations of NT-proBNP were assessed at baseline and after treatment including non-invasive ventilation (NIV). The relationship of NT-proBNP to disease severity and its predictive value for survival were evaluated up to 4 years. RESULTS:NT-proBNP levels were markedly elevated in patients with CHRF (n=60; geometric mean (SD) 546.4 (4.9) pg/mL; p<0.001) compared to healthy controls (n=182; 49.0 (2.2) pg/mL). After excluding patients with concomitant HF or renal impairment, levels were still increased (n=43; 393.2 (3.8) pg/mL; p<0.001). According to multivariate regression, hypoxia and exacerbation independently determined NT-proBNP levels (p<0.05 each). After initiation of NIV, blood gases and lung function improved and NT-proBNP decreased (-31.3 (0.3)%; p<0.001). During 22.5 (2.2) months follow-up, NT-proBNP was not significantly associated with survival in the total population, however, the subgroup of patients with levels >722 pg/mL (67th percentile) and no adherence to NIV displayed poor prognosis (hazard ratio=0.21; 95%-CI=0.022-0.580; p=0.0091). CONCLUSIONS:NT-proBNP was highly elevated in patients with CHRF and correlated with the degree of respiratory impairment and exacerbation. Correspondingly, treatment including NIV led to reduction of NT-proBNP. These data indicate a potential role of NT-proBNP in assessing disease severity, treatment efficacy and prognosis in CHRF.
journal_name
Respir Medjournal_title
Respiratory medicineauthors
Budweiser S,Luchner A,Jörres RA,Heinemann F,Hitzl AP,Schmidbauer K,Riegger G,Pfeifer Mdoi
10.1016/j.rmed.2007.04.001subject
Has Abstractpub_date
2007-09-01 00:00:00pages
2003-10issue
9eissn
0954-6111issn
1532-3064pii
S0954-6111(07)00142-4journal_volume
101pub_type
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