Document Detail

C-reactive protein elevation in patients with atrial arrhythmias: inflammatory mechanisms and persistence of atrial fibrillation.
MedLine Citation:
PMID:  11739301     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Atrial fibrillation (AF) may persist due to structural changes in the atria that are promoted by inflammation. C-reactive protein (CRP), a marker of systemic inflammation, predicts cardiovascular events and stroke, a common sequela of AF. We hypothesized that CRP is elevated in patients with atrial arrhythmias. METHODS AND RESULTS: Using a case-control study design, CRP in 131 patients with atrial arrhythmias was compared with CRP in 71 control patients. Among arrhythmia patients, 6 had frequent atrial ectopy or tachycardia, 86 had paroxysmal AF, 39 had persistent AF lasting >30 days, and 70 had lone arrhythmias. CRP was higher in arrhythmia than in control patients (median, 0.21 versus 0.096 mg/dL; P<0.001). Arrhythmia patients in AF within 24 hours before sampling had higher CRP than those in sinus rhythm (0.30 versus 0.15 mg/dL; P<0.001). CRP in controls was not different than in patients with atrial ectopy or tachycardia. Lone arrhythmia patients had a CRP of 0.21 mg/dL, which was not significantly lower than arrhythmia patients with structural heart disease (CRP, 0.23 mg/dL) but higher than controls (P=0.002). Persistent AF patients had a higher CRP (0.34 mg/dL) than paroxysmal AF patients (0.18 mg/dL; P=0.008); both groups had higher CRP levels than controls (P</=0.005). CONCLUSIONS: CRP is elevated in AF patients. This study is the first to document elevated CRP in non-postoperative arrhythmia patients. These findings are reinforced by stepwise CRP elevation with higher AF burden. Although the cause of elevated CRP levels in AF patients remains unknown, elevated CRP may reflect an inflammatory state that promotes the persistence of AF.
M K Chung; D O Martin; D Sprecher; O Wazni; A Kanderian; C A Carnes; J A Bauer; P J Tchou; M J Niebauer; A Natale; D R Van Wagoner
Publication Detail:
Type:  Comment; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Circulation     Volume:  104     ISSN:  1524-4539     ISO Abbreviation:  Circulation     Publication Date:  2001 Dec 
Date Detail:
Created Date:  2001-12-12     Completed Date:  2002-01-11     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2886-91     Citation Subset:  AIM; IM    
Department of Cardiovascular Medicine, the Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
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MeSH Terms
Analysis of Variance
Arrhythmias, Cardiac / metabolism*
Atrial Fibrillation / metabolism
C-Reactive Protein / metabolism*
Case-Control Studies
Heart Atria / metabolism*,  physiopathology
Inflammation / metabolism
Middle Aged
Grant Support
Reg. No./Substance:
9007-41-4/C-Reactive Protein
Comment On:
Circulation. 1998 Sep 8;98(10):946-52   [PMID:  9737513 ]
Comment In:
Circulation. 2002 Aug 27;106(9):e40; author reply e40   [PMID:  12196350 ]

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