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Value of a single troponin T at the time of presentation as compared to serial CK-MB determinations in patients with suspected myocardial ischemia.
- Source :
-
Clinica chimica acta; international journal of clinical chemistry [Clin Chim Acta] 2002 Dec; Vol. 326 (1-2), pp. 185-92. - Publication Year :
- 2002
-
Abstract
- Background: Prior studies with cardiac markers have focused predominantly on subjects presenting to the emergency department with chest pain or unstable angina, and have relied on serial markers for the diagnosis of acute myocardial infarction. We evaluated the diagnostic utility of a single cardiac troponin T (cTnT) determination at the time of presentation as compared to serial creatine kinase (CK) MB determinations in a broad spectrum of patients with suspected myocardial ischemia.<br />Methods: A total of 267 consecutive patients presenting to the emergency department with suspected myocardial ischemia had a single, blinded cTnT determination drawn at the time of presentation to the emergency department in addition to routine serial electrocardiographic and CK-MB determinations.<br />Results: The specificity (93.7% vs. 87.1%; p<0.05) and positive predictive value (80.0% vs. 69.4%; p<0.05) of a single cTnT determination were superior to that of serial CK-MB determinations without compromising sensitivity. Forty-six percent of patients with confirmed myocardial infarction and an abnormal cTnT at presentation had a normal initial CK-MB determination. Conversely, 20% of patients without acute coronary syndromes had an abnormal CK-MB determination in the setting of a normal cTnT. The initial cTnT was abnormal in all patients with confirmed myocardial infarction and a symptom duration of at least 3.5 h.<br />Conclusions: In a heterogeneous population of patients with suspected myocardial ischemia, the initial cTnT determination drawn at the time of presentation is a powerful diagnostic tool that, when used in context with symptom duration, allows for more rapid and accurate triage of patients than serial CK-MB determinations.
- Subjects :
- Adult
Aged
Angina Pectoris diagnosis
Creatine Kinase, MB Form
Diagnosis, Differential
Electrocardiography
Female
Humans
Male
Middle Aged
Myocardial Infarction enzymology
Sensitivity and Specificity
Creatine Kinase blood
Isoenzymes blood
Myocardial Infarction blood
Myocardial Infarction diagnosis
Troponin T blood
Subjects
Details
- Language :
- English
- ISSN :
- 0009-8981
- Volume :
- 326
- Issue :
- 1-2
- Database :
- MEDLINE
- Journal :
- Clinica chimica acta; international journal of clinical chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 12417111
- Full Text :
- https://doi.org/10.1016/s0009-8981(02)00303-0