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A Circulating Biomarker Risk-Prediction Model Correlates with CHADS-2 Risk Score in Chronic Atrial Fibrillation.

by Negi, Smita I.
Citation: IJC Metabolic & Endocrine. 6:24-26, 2015 Mar.Journal: IJC metabolic & endocrine.Published: 2015ISSN: 2214-7624.Full author list: Negi SI; Greener I; Anand A; Dudley SC Jr.UI/PMID: 25709897.Subject(s): PubMed-not-MEDLINE -- Not indexedInstitution(s): MedStar Heart & Vascular InstituteActivity type: Journal Article.Medline article type(s): Journal ArticleOnline resources: Click here to access online Digital Object Identifier: (Click here) Abbreviated citation: IJC Metab Endocr. 6:24-26, 2015 Mar.Abstract: BACKGROUND: Inflammation and oxidative stress have been linked to the origin and persistence of atrial fibrillation (AF). CHADS-2 scoring system is a risk stratification schema well validated in prognostication of stroke in AF. We evaluated the association of markers of oxidative stress and inflammation with CHADS-2 scores in chronic AF patients.Abstract: METHODS: CHADS-2 scores were calculated for 64 subjects with chronic AF. Serum markers of inflammation [C-reactive protein (hs-CRP), interleukin-6 (IL-6), interleukin 1beta (IL-1beta), tumor necrosis factor-alpha (TNF-alpha)] and of oxidative stress [Derivatives of reactive oxygen metabolites (DROMs) and isoprostanes (IsoPs)] were measured.Abstract: RESULTS: Twenty subjects were categorized as 0 (no risk), 24 as 1 (intermediate risk) and 20 as 2 (severe risk) based on their CHADS-2 scores. High sensitivity-CRP (CHADS-2 0=40.0%, 1=70.0%, 2=90.0%; p=0.003) and DROMs (CHADS-2 0=45%, 1=78%, 2=80%; p=0.04) were positively associated with the CHADS-2 risk score. Subjects with intermediate to severe CHADS-2 risk retained significant associations with abnormal hs-CRP (OR: 5.3, 95%CI: 1.1-25.0) and DROMs (adjusted OR: 6.7, 95%CI: 1.2-38.8) after adjusting for gender and hypertension. In a multiple logistic interaction model, there was no significant interaction between hs-CRP and DROMs in their association with CHADS-2 risk categories (p=0.64). A biomarker risk-model, combining hs-CRP and DROMs, correlated well with the CHADS-2 risk categories (r= 0.49, p<0.001).Abstract: CONCLUSIONS: A biomarker risk-model using a combination of hs-CRP and DROMs correlates well with CHADS-2 risk scores in chronic AF. Either or both of these markers may add predictive power to future stroke risk prediction models.

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