Respiratory Filter Reduces the Cardiovascular Effects Associated With Diesel Exhaust Exposure A Randomized, Prospective, Double-Blind, Controlled Study of Heart Failure: The FILTER-HF Trial

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art_VIEIRA_Respiratory_Filter_Reduces_the_Cardiovascular_Effects_Associated_With_2016.PDF (827.67 KB)
Citações na Scopus
37
Tipo de produção
article
Data de publicação
2016
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
ELSEVIER SCI LTD
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Citação
JACC-HEART FAILURE, v.4, n.1, p.55-64, 2016
Projetos de Pesquisa
Unidades Organizacionais
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Resumo
OBJECTIVES The goal of this study was to test the effects of a respiratory filter intervention (filter) during controlled pollution exposure. BACKGROUND Air pollution is considered a risk factor for heart failure (HF) decompensation and mortality. METHODS This study was a double-blind, randomized to order, controlled, 3-way crossover, single-center clinical trial. It enrolled 26 patients with HF and 15 control volunteers. Participants were exposed in 3 separate sessions to clean air, unfiltered diesel exhaust exposure (DE), or filtered DE. Endpoints were endothelial function assessed by using the reactive hyperemia index (RHi), arterial stiffness, serum biomarkers, 6-min walking distance, and heart rate variability. RESULTS In patients with HF, DE was associated with a worsening in RHi from 2.17 (interquartile range [IQR]: 1.8 to 2.5) to 1.72 (IQR: 1.5 to 2.2; p = 0.002) and an increase in B-type natriuretic peptide (BNP) from 47.0 pg/ml (IQR: 17.3 to 118.0 pg/ml) to 66.5 pg/ml (IQR: 26.5 to 155.5 pg/ml; p = 0.004). Filtration reduced the particulate concentration (325 +/- 31 mu g/m(3) vs. 25 +/- 6 mu g/m(3); p < 0.001); in the group with HF, filter was associated with an improvement in RHi from 1.72 (IQR: 1.5 to 2.2) to 2.06 (IQR: 1.5 to 2.6; p = 0.019) and a decrease in BNP from 66.5 pg/ml (IQR: 26.5 to 155.5 pg/ml) to 44.0 pg/ml (IQR: 20.0 to 110.0 pg/ml; p = 0.015) compared with DE. In both groups, DE decreased the 6-min walking distance and arterial stiffness, although filter did not change these responses. DE had no effect on heart rate variability or exercise testing. CONCLUSIONS To our knowledge, this trial is the first to show that a filter can reduce both endothelial dysfunction and BNP increases in patients with HF during DE. Given these potential benefits, the widespread use of filters in patients with HF exposed to traffic-derived air pollution may have beneficial public health effects and reduce the burden of HF. (Effects of Air Pollution Exposure Reduction by Filter Mask on Heart Failure; NCT01960920) (C) 2016 by the American College of Cardiology Foundation.
Palavras-chave
air pollution, endothelium, heart failure
URI
https://observatorio.fm.usp.br/handle/OPI/13519
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Artigos e Materiais de Revistas Científicas - FM/MPT
Artigos e Materiais de Revistas Científicas - FM/MCP
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - LIM/05
Artigos e Materiais de Revistas Científicas - LIM/11
Artigos e Materiais de Revistas Científicas - ODS/03
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