Document Detail

Serum interleukin-6 concentration reflects the extent of asymptomatic left ventricular dysfunction and predicts progression to heart failure in patients with stable coronary artery disease.
MedLine Citation:
PMID:  21382729     Owner:  NLM     Status:  Publisher    
BACKGROUND: Left ventricular ejection fraction (LVEF) remains one of the strongest predictors of long-term prognosis in patients with stable coronary artery disease (CAD). Asymptomatic left ventricular systolic dysfunction (LVSD) often precedes clinically overt heart failure (HF) and is an area of extensive research nowadays. We studied the association between serum IL-6 concentrations and the extent of LV dysfunction in patients with asymptomatic LVSD. We aimed to investigate the diagnostic value of serum IL-6 concentrations in predicting the risk of progression to HF. Seventy-one patients entered the study and were divided into three groups based on LVEF: group 1 - patients with LVEF <30% (N=7), group 2 - patients with LVEF 30-50% (N=37) and group 3 - patients with LVEF >50% (N=27). RESULTS: Demographics were similar in all three groups. IL-6 concentration was the highest in group 1 (median 8.6pg/mL) and the lowest in group 3 (median 2.6pg/mL), whereas IL-6 concentration in group 2 was intermediate (median 3.7pg/mL) (P=0.002). We found a significant, inverse correlation between IL-6 concentration and ejection fraction. During 18-month follow-up clinically overt HF developed in 71.4% of patients in group 1 and in 37.5% of patients in group 2. None of the patients in group 3 manifested HF symptoms (P<0.001). ROC analysis revealed high diagnostic value of serum IL-6 and LVEF in predicting progression to HF. We also found a strong, inverse correlation between IL-6 and the time of progression to HF. CONCLUSIONS: There is a strong correlation between IL-6 and the extent of asymptomatic LVSD in patients with documented CAD. Elevated IL-6 concentrations preceded progression to clinically overt HF. Moreover, the higher the IL-6 concentration the earlier the manifestation of HF symptoms.
Bartosz Hudzik; Janusz Szkodzinski; Wojciech Romanowski; Aleksander Danikiewicz; Krzysztof Wilczek; Andrzej Lekston; Lech Polonski; Barbara Zubelewicz-Szkodzinska
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-5
Journal Detail:
Title:  Cytokine     Volume:  -     ISSN:  1096-0023     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9005353     Medline TA:  Cytokine     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Third Department of Cardiology, Silesian Center for Heart Disease, Silesian Medical University, Szpitalna 2, 41-800 Zabrze, Poland.
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