Management and outcomes of acute coronary syndrome with minimal myocardial necrosis: analysis of a large prospective registry from a non-interventional centre.
Int J Clin Pract 2006;
60:383-90. [PMID:
16620349 DOI:
10.1111/j.1368-5031.2006.00816.x]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to assess the clinical risk of minimal myonecrosis below the cut-off for acute myocardial infarction (MI) in comparison with other grades of acute coronary syndrome (ACS). One-thousand four hundred and sixty seven consecutive patients with ACS admitted between May 2001 and April 2002 were studied in a non-interventional centre. Patients were divided into unstable angina (UA) (cTnT < 0.01 microg/l), non-ST elevation ACS with minimal myonecrosis (0.01 <or= cTnT < 0.1 microg/l), non-ST elevation MI (NSTEMI) (cTnT >or= 0.1 microg/L) and ST elevation myocardial infarction (STEMI). UA (n = 638) was associated with the fewest events at 6 months (2% cardiac death or MI). Patients with any myonecrosis (n = 829) had worse outcomes (6-month cardiac death or MI 18.3-23.3%). Compared with ACS patients with minimal myonecrosis, UA patients were at significantly lower risk (OR 0.21, 95% CI 0.12-0.45, p < 0.001), NSTEMI patients were at similar risk (OR 1.45, 95% CI 0.89-2.35, p = 0.13), and STEMI patients were at higher risk (OR 2.12 95% CI 1.26-3.85, p = 0.008) in adjusted analyses. Nearly 85% of cardiac deaths occurred within 6 months. The risk of adverse events was higher among patients managed by non-cardiologists (OR 1.66, 95% CI 1-2.75, p = 0.049). Patients with non-ST elevation ACS and minimal myonecrosis are a high-risk group more comparable with NSTEMI and clearly distinguishable from patients with UA.
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