Document Detail

Impact of delayed presentation on management and outcome of non-ST-elevation acute coronary syndromes.
MedLine Citation:
PMID:  18657655     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The impact of delayed presentation on the management and outcomes of patients with non-ST-elevation acute coronary syndromes (NSTE-ACS) has not been well studied. Furthermore, the prognostic value of initial biomarker level in relation to the time of presentation has not been determined. METHODS: The Canadian ACS II registry was a national, multicenter, prospective observational study of 1,956 patients with NSTE-ACS (October 2002-December 2003). We compared the baseline characteristics, treatment, and outcomes in early (within 6 hours of symptom onset) versus late presenters (>6 hours). A logistic regression model was developed to examine the independent association of late presentation with 1-year mortality. We also evaluated the prognostic value of initial biomarker level in relation to early versus late presentation. RESULTS: A total of 1,219 (62.3%) patients presented early, whereas 727 (37.7%) presented late; their rates of in-hospital revascularization were similar (40.5% vs 42.5%, respectively, P = .39). There was also no significant difference in hospital mortality (1.6% vs 2.2%, P = .30) or 1-year mortality (7.6% vs 5.7%, P = .13) between early and late presenters. After adjusting for other prognosticators, late presentation was not an independent predictor of 1-year mortality (adjusted odds ratio 0.78, 95% confidence interval 0.48-1.26, P = .3). Elevated initial biomarker was independently associated with higher 1-year mortality (adjusted odds ratio 2.17, 95% CI 1.31-3.58, P = .002) regardless of whether hospital presentation was early or late (P for interaction = .74). CONCLUSIONS: There is still considerable delay between symptom onset of NSTE-ACS and hospital presentation in the contemporary era. In contrast to studies of ST-elevation myocardial infarction, we found no significant differences in the management and outcome of early presenters as compared with late presenters with NSTE-ACS. Nevertheless, measures to reduce patient delay time should continue to be implemented. Initial biomarker status is a useful prognosticator irrespective of the delay time.
Basem Elbarouni; Shaun G Goodman; Raymond T Yan; Amparo Casanova; Abdul Al-Hesayen; Stephen Pearce; David H Fitchett; Anatoly Langer; Andrew T Yan;
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Publication Detail:
Type:  Comparative Study; Journal Article; Multicenter Study     Date:  2008-06-17
Journal Detail:
Title:  American heart journal     Volume:  156     ISSN:  1097-6744     ISO Abbreviation:  Am. Heart J.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-07-28     Completed Date:  2008-08-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  262-8     Citation Subset:  AIM; IM    
Terrence Donnelly Heart Centre, Division of Cardiology, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
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MeSH Terms
Acute Coronary Syndrome / classification,  mortality,  therapy*
Biological Markers / blood
Logistic Models
Middle Aged
Prospective Studies
Time Factors
Treatment Outcome
Reg. No./Substance:
0/Biological Markers

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