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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Greaves, Ronda / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Payne, Deborah A. / Schlattmann, Peter


IMPACT FACTOR 2018: 3.638

CiteScore 2018: 2.44

SCImago Journal Rank (SJR) 2018: 1.191
Source Normalized Impact per Paper (SNIP) 2018: 1.205

Online
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1437-4331
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Volume 47, Issue 3

Issues

Clinical usefulness of measuring red blood cell distribution width on admission in patients with acute coronary syndromes

Giuseppe Lippi / Luca Filippozzi / Martina Montagnana / Gian Luca Salvagno / Massimo Franchini
  • 5Servizio di Immunoematologia e Trasfusione, Azienda Ospedale-Università di Parma, Parma, Italy
  • Other articles by this author:
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/ Gian Cesare Guidi / Giovanni Targher
  • 7Sezione di Endocrinologia e Malattie del Metabolismo, Dipartimento di Scienze Biomediche e Chirurgiche, Università di Verona, Verona, Italy
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Published Online: 2009-02-04 | DOI: https://doi.org/10.1515/CCLM.2009.066

Abstract

Background: Conventional cardiac markers used for the biochemical diagnosis of acute coronary syndromes (ACS) have a high specificity but low sensitivity within 2–4 h of symptoms onset. The red blood cell distribution width (RDW), reflecting the size variability of circulating red blood cells, has been shown to be independently associated with an increased risk of major cardiovascular events. We assessed whether there is an association between RDW at admission and cardiac troponin T (cTnT) elevation in patients with chest pain.

Methods: We analyzed RDW values in 2304 adult patients, who were consecutively admitted over a 1-year period to the local emergency department for chest pain suggestive of ACS. In all patients, a baseline blood sample was collected for routine haematological testing, whereas cTnT was measured at baseline and after 4, 6, and 12 h.

Results: A total of 456 patients (19.8% of total) had ACS. These patients, all having cTnT≥0.03 μg/L up to 12 h from admission other than ischaemic electrocardiographic changes, had higher RDW than non-ACS patients [median 15.1%, (5th–95th percentiles) 13.2%–19.0% vs. 13.5%, 12.9%–17.1%, p<0.001]. On admission, the sensitivity and specificity of cTnT were 94% (25 false negative results) and 100%, respectively. The diagnostic accuracy of RDW, as calculated by the receiver operating characteristic curve analysis, was 0.705 (p<0.001). At the cut-off value of 14%, the clinical sensitivity and specificity of RDW on admission were 79% and 50%, respectively. In 21 out of 25 patients classified as false negative for cTnT on admission, the RDW was >14%. Accordingly, the diagnostic sensitivity of the two combined measurements on admission was 99%.

Conclusions: As RDW is widely available to clinicians as a part of the complete blood count, and therefore incurs no additional costs, it might be considered with other conventional cardiac markers for the risk stratification of ACS patients admitted to emergency departments.

Clin Chem Lab Med 2009;47:353–7.

Keywords: acute coronary syndrome; myocardial infarction; red blood cell distribution width

About the article

Corresponding author: Prof. Giuseppe Lippi, MD, Sezione di Chimica Clinica, Dipartimento di Scienze Morfologico-Biomediche, Università degli Studi di Verona, Ospedale Policlinico G.B. Rossi, Piazzale Scuro, 10, 37134 – Verona, Italy Phone: +39-045-8126698, Fax: +39-045-8201889,


Received: 2008-05-19

Accepted: 2008-11-25

Published Online: 2009-02-04

Published in Print: 2009-03-01


Citation Information: Clinical Chemistry and Laboratory Medicine, Volume 47, Issue 3, Pages 353–357, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: https://doi.org/10.1515/CCLM.2009.066.

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