(Circulation. 2001;104:1454.)
© 2001 American Heart Association, Inc.
Editorials |
From the Kerckhoff Heart Center, Bad Nauheim, Germany.
Correspondence to Christian W. Hamm, MD, Kerckhoff Heart Center, Benekestrasse 2-8, D-61231 Bad Nauheim, Germany. E-mail Christian.Hamm@kerckhoff.med.uni-giessen.de
Key Words: Editorials myoglobin diagnosis myocardial infarction troponin
Physicians caring for acute chest pain patients constantly maneuver between unnecessary admissions and premature discharges. The ECG is the most readily available tool for identifying patients with ST-segment elevation, who are likely to have myocardial infarctions and who should receive reperfusion treatment. Establishing the correct diagnosis in the patients without ST-segment elevation, however, can be much more challenging. Undetected infarctions remain a serious public health issue and represent the leading cause of malpractice cases in the emergency room setting.1 Prematurely discharged patients often have been seen by physicians with less professional experience. Such patients frequently have more atypical complaints and nondiagnostic ECG findings, are younger, and are at higher risk than admitted patients.1,2
See p 1483
Ruling out acute myocardial infarctions, however, is an incomplete strategy according to todays standards. The target has moved to risk stratification, with the objective being not only to detect evolving myocardial infarctions, but also to identify the patient who is at risk of developing a life-threatening cardiac event in the near future. For this task, the ECG has limited prognostic relevance because abnormalities are infrequent and are of low sensitivity and specificity. Only ST-segment depression, which is found in about one third of the patients, is associated with short- and long-term adverse outcome.3,4
Biomarkers in the New Guidelines
In recent years, novel biochemical markers have emerged that play a pivotal role in diagnosis, risk stratification, and guidance of treatment. Markers of inflammation, such as C-reactive protein, have been found helpful in predicting the long-term prognosis, whereas the improved markers
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