Document Detail


Relationship between low lymphocyte count and major cardiac events in patients with acute chest pain, a non-diagnostic electrocardiogram and normal troponin levels.
MedLine Citation:
PMID:  19230894     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: Risk stratification of patients with acute chest pain, non-diagnostic electrocardiogram and normal troponin (ACPneg) remains a challenge, partly because no standardized set of biomarkers with prognostic ability has been identified in this population. Lymphopenia has been associated with atherosclerosis progression and adverse outcomes in cardiovascular diseases; although its prognostic value in ACPneg is unknown. We sought to determine the relationship between the lymphocyte count obtained in the Emergency Department (ED) and the risk of the long-term all-cause mortality or myocardial infarction (MI) in patients with ACPneg. METHODS: We analyzed 1030 consecutive patients admitted with ACPneg in our institution. Lymphocyte count was determined in the ED as a part of a routine diagnostic workup to rule out an acute coronary syndrome. Patients with inflammatory, infectious diseases, or active malignancy were excluded (final sample=975). The independent association between lymphocyte count and the composite endpoint (death/MI) was assessed by survival analysis for competing risk events (revascularization procedures). RESULTS: During a median follow-up of 36 months, 139 (14.3%) patients achieved the combined endpoint, with rates increasing monotonically across lymphocyte quartiles (6.2%, 10%, 20.6% and 24.1% for Q4, Q3, Q2 and Q1 (p<0.001), respectively). In a multivariable analysis, patients in lymphocytes' Q1 and Q2 as compared with those in Q4 had an increased risk for the combined endpoint: HR=2.45 (CI 95% 1.25-4.79, p=0.008) and HR=2.56 (CI 95% 1.30-5.07, p=0.007), respectively. CONCLUSION: In patients with ACPneg, low lymphocytes count was associated with an increased risk for developing the combined endpoint of death or MI.
Authors:
Julio Núñez; Juan Sanchis; Vicent Bodí; Eduardo Núñez; Luis Mainar; Anne M Heatta; Oliver Husser; Gema Miñana; Pilar Merlos; Helene Darmofal; Mauricio Pellicer; Angel Llàcer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-01-29
Journal Detail:
Title:  Atherosclerosis     Volume:  206     ISSN:  1879-1484     ISO Abbreviation:  Atherosclerosis     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-08-31     Completed Date:  2009-12-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0242543     Medline TA:  Atherosclerosis     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  251-7     Citation Subset:  IM    
Affiliation:
Servicio de Cardiología, Hospital Clínico Universitario, Universitat de Valencia, Avda. Blasco Ibáñez 17, Valencia, Spain. yulnunez@gmail.com
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MeSH Terms
Descriptor/Qualifier:
Aged
Biological Markers
Chest Pain / diagnosis,  etiology*
Diagnosis, Differential
Electrocardiography*
Emergency Service, Hospital
Female
Humans
Lymphocyte Count*
Male
Middle Aged
Myocardial Infarction / diagnosis*,  mortality
Troponin / blood*
Chemical
Reg. No./Substance:
0/Biological Markers; 0/Troponin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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