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Vol. 35, No. 1, 2013
Issue release date: February 2013
Section title: Original Paper
Cerebrovasc Dis 2013;35:64–72
(DOI:10.1159/000345336)

Relationship between Plasma D-Dimer Level and Cerebral Infarction Volume in Patients with Nonvalvular Atrial Fibrillation

Matsumoto M. · Sakaguchi M. · Okazaki S. · Furukado S. · Tagaya M. · Etani H. · Shimazu T. · Yoshimine T. · Mochizuki H. · Kitagawa K.
aStroke Center, Departments of bNeurology, cTraumatology and Acute Critical Medicine and dNeurosurgery, Osaka University Graduate School of Medicine, and eDivision of Stroke Medicine, Osaka National Hospital, Osaka, Japan

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/1/2012 1:39:59 PM
Accepted: 10/22/2012
Published online: 2/14/2013

Number of Print Pages: 9
Number of Figures: 2
Number of Tables: 4

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED

Abstract

Background: Plasma D-dimer level may reflect the activity of thrombus formation in the left atrium of patients with nonvalvular atrial fibrillation (NVAF). Proper anticoagulation with warfarin dramatically decreases the rate of cerebral embolism, reduces stroke severity and subsequent risk of death, as well as the level of D-dimer in NVAF patients. However, the predictive value of D-dimer level on cerebral embolism severity has not been examined. Thus, the purpose of this study was to investigate the association between plasma D-dimer level at admission and infarct size in NVAF patients. Methods: We identified 124 patients with consecutive ischemic stroke and NVAF who were admitted within 48 h of symptom onset. We measured infarction volume from CT taken after 3 ± 1 days from the onset. Plasma D-dimer levels were measured at the time of admission. Relationships were analyzed between infarction volume and plasma D-dimer levels, cardiovascular risk factors, preadmission medications and admission conditions. We also assessed the influence of D-dimer level on functional outcome in patients with preadmission modified Rankin Scale (mRS) score of 0–1 and patients by tertile of D-dimer level (≤0.83, 0.83–2.16 and ≥2.16 µg/ml). Results: Infarction volume significantly correlated with D-dimer level (r = 0.309, p < 0.001), systolic blood pressure (r = 0.201, p = 0.026), diastolic blood pressure (r = 0.283, p = 0.002), National Institutes of Health Stroke Scale (NIHSS) score on admission (r = 0.546, p < 0.001) and mRS score at discharge (r = 0.557, p < 0.001). Multivariate regression analyses showed that the D-dimer level was significantly associated with infarction volume after adjusting for age, sex, current smoker or not, prothrombin time-international normalized ratio ≥1.6, diastolic blood pressure, CHADS2 score and NIHSS score on admission. In patients with a preadmission mRS score of 0–1 (n = 108), D-dimer level was significantly associated with NIHSS score at admission (r = 0.318, p < 0.001) and mRS score at discharge (r = 0.310, p = 0.001). Patients in the highest D-dimer tertile group showed worse outcome than those in the middle (p = 0.041) and lowest (p < 0.001) tertiles. Conclusions: Plasma D-dimer level on admission is significantly related to infarction volume and functional outcome, following cardioembolic stroke in NVAF patients.


  

Author Contacts

Mari Matsumoto, MD
Department of Neurology, Osaka University Graduate School of Medicine
2-2 Yamadaoka, Suita
Osaka 565-0871 (Japan)
E-Mail m-marine@medone.med.osaka-u.ac.jp

  

Article Information

Received: July 1, 2012
Accepted: October 22, 2012
Published online: February 14, 2013
Number of Print Pages : 9
Number of Figures : 2, Number of Tables : 4, Number of References : 41

  

Publication Details

Cerebrovascular Diseases

Vol. 35, No. 1, Year 2013 (Cover Date: February 2013)

Journal Editor: Hennerici M.G. (Mannheim)
ISSN: 1015-9770 (Print), eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/1/2012 1:39:59 PM
Accepted: 10/22/2012
Published online: 2/14/2013

Number of Print Pages: 9
Number of Figures: 2
Number of Tables: 4

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED


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