Abstract：
BACKGROUND:Testing for troponin has important clinical value for patients who present with typical symptoms of acute coronary syndromes (ACS) such as chest pain (CP). Much less is known about the value of troponin testing for patients who present with other symptoms of ACS (anginal equivalent symptoms). METHODS:The utilization and prognostic value of cardiac troponin I (cTnI) were evaluated at a Veterans Affairs Acute Care Facility. Clinical charts of 1184 predominantly male patients, who submitted specimens for initial cTnI testing by AxSYM, were evaluated for demographic data, cardiovascular risk factors, major diseases, and complaints at the time of testing. The endpoint was defined as all-cause death during a 200-day period after initial testing. RESULTS:Sixty-one percent of cTnI tests were ordered for patients who did not present with CP. Patients presenting with symptoms other than CP did not have significantly lower plasma cTnI than patients with CP. However, patients with symptoms other than CP were rarely diagnosed with ACS unless cTnI was >/=2 microg/L. The mortality during the follow-up period was severalfold higher among patients presenting with symptoms other than CP (CP, 6%; without CP, 22%; P <0.0001, chi(2) test). cTnI >/=0.2 microg/L provided significant additional predictive information for patients who presented with anginal equivalent symptoms such as shortness of breath or general weakness. CONCLUSION:Patients with anginal equivalent symptoms of ACS and low-positive cTnI are less often diagnosed with ACS and have a higher mortality than patients with CP.
journal_name
Clin Chemjournal_title
Clinical chemistryauthors
Ritter D,Lee PA,Taylor JF,Hsu L,Cohen JD,Chung HD,Virgo KSdoi
10.1373/clinchem.2003.016311subject
Has Abstractpub_date
2004-01-01 00:00:00pages
112-9issue
1eissn
0009-9147issn
1530-8561pii
50/1/112journal_volume
50pub_type
杂志文章abstract：:I describe a gas-chromatographic procedure involving a nitrogen detector for "free" (or "unbound") phenytoin in the concentration range 0.2-4.0 mg/L in ultrafiltrates of plasma. The CV (n = 10) for the assay was 2.9% for a 0.49 mg/L concentration, 1.5% for 2.02 mg/L. The sensitivity was 0.05 mg/L. The ultrafiltration ...
journal_title：Clinical chemistry
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journal_title：Clinical chemistry
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journal_title：Clinical chemistry
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更新日期：1982-09-01 00:00:00
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更新日期：1992-05-01 00:00:00
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doi：
更新日期：1984-12-01 00:00:00
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doi：
更新日期：1984-11-01 00:00:00
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doi：
更新日期：1997-10-01 00:00:00
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doi：
更新日期：1995-01-01 00:00:00
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doi：
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doi：
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更新日期：1991-12-01 00:00:00
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