Evidence map›Paper›PMID 20022819›Full record

ArticleHeart rhythm2010

Intracardiac and extracardiac markers of inflammation during atrial fibrillation.

Gregory M Marcus, Lisa M Smith, Karen Ordovas, Melvin M Scheinman, Albert M Kim, Nitish Badhwar, Randall J Lee, Zian H Tseng, Byron K Lee, Jeffrey E Olgin

Abstract read
In one paragraph

Article in Heart rhythm, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed, 1 pooled it
4.5field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

71 citing papers in PubMed, 1 synthesis or guideline pooled it, 159 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Immune responses and activity of inflammatory mediators in pulmonary vein arrhythmogenesis.International journal of cardiology. Cardiovascular risk and prevention · 2025
    Review
  6. A novel technique for vein of Marshall blood sampling and its application in assessing atrial remodeling in atrial fibrillation.Clinical research in cardiology : official journal of the German Cardiac Society · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. The Role of Inflammation and Oxidative Stress in Rheumatic Heart Disease.International journal of molecular sciences · 2022
    Review
  20. The Role of Major Inflammatory Biomarkers in the Pathogenesis of Atrial Fibrillation.The Journal of innovations in cardiac rhythm management · 2022
    Article

11 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 1 institution in 1 country.

Gregory M MarcusDivision of Cardiology, University of California, San Francisco, CA, USA. marcusg@medicine.ucsf.edu
Lisa M Smith
Karen Ordovas
Melvin M Scheinman
Albert M Kim
Nitish Badhwar
Randall J Lee
Zian H Tseng
Byron K Lee
Jeffrey E Olgin
University of California, San Francisco · US

Funding

CTSA: K12 COMPONENTKL2RR024130 · NCRR · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI JOHNSTON, S. CLAIBORNE · 2006 to 2011
$19.3M
NCRR NIH HHS KL2 RR024130NHLBI NIH HHS L30 HL078035
6 · The paper itself

Abstract

backgroundA decrease in inflammation after cure of atrial arrhythmias suggests that such arrhythmias are proinflammatory, and lower inflammatory marker levels in the coronary sinus suggest that atrial arrhythmias result in intracardiac appropriation of inflammatory cytokines.

objectiveThe purpose of this study was to investigate the effect of atrial fibrillation on inflammatory markers drawn from intracardiac and extracardiac chambers.

methodsWe performed a case-control study of 167 AF patients and 207 controls. Blood from intracardiac and extracardiac sites was obtained from a subset of patients undergoing curative AF ablation (n = 46).

resultsNo significant differences in C-reactive protein (CRP) or interleukin-6 (IL-6) levels were seen between patients with and those without a history of AF. Both levels were significantly higher when blood was drawn during AF than during sinus rhythm: median CRP 3.1 mg/dL (interquartile range [IQR] 1.0-6.0) versus 1.7 mg/dL (IQR 0.7-3.9, P = .0005); median IL-6 2.3 ng/mL (IQR 1.5-3.9) versus 1.5 ng/mL (IQR 0.7-2.5, P = .007). This finding persisted after adjusting for potential confounders. AF ablation patients in AF exhibited a positive median left atrial minus coronary sinus gradient CRP (0.3 mg/dL, IQR -0.03-1.1), whereas those in sinus rhythm had a negative median left atrial minus coronary sinus gradient CRP (-0.2, IQR -0.8-[-0.02], P = .01). Femoral artery minus femoral vein gradients in AF versus sinus rhythm did not show any differences.

conclusionAF at the time of the blood draw, rather than a history of AF, was independently associated with inflammation. Differences in transcardiac gradients suggest that AF results in sequestration of inflammatory cytokines in the heart.

Indexed as

Atrial FibrillationBiomarkersCase-Control StudiesChi-Square DistributionComorbidityC-Reactive ProteinEnzyme-Linked Immunosorbent AssayFemaleHumansInflammationInterleukin-6Logistic ModelsMaleMiddle AgedStatistics, NonparametricBiomarkersC-Reactive ProteinInterleukin-6

Identifiers

PMID20022819
PMCPMC2900773
OpenAlexW1988189648

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.