TROPONIN-T - A DIAGNOSTIC MARKER FOR MYOCARDIAL-INFARCTION AND MINOR CARDIAC CELL-DAMAGE

The diagnosis of acute myocardial infarction is straight-forward when anginal pain is accompanied by typical ECG changes and in these patien ts measurements of cardiac markers are unnecessary in deciding whether thrombolytic therapy is appropriate. Cardiac markers in patients with acute ischaemic coronary syndromes, however, may serve to identify a high risk subgroup of patients with small acute infarctions or minor m yocardial damage. In many patients with chest pain a valid diagnosis o f myocardial cell injury depends on the result of biochemical assays. In 30% of patients with unstable angina, troponin T is elevated althou gh myocardial infarction was ruled out by cardiac enzymes and ECG reco rdings. The outcome of these patients at 4 weeks and 6 months follow-u p is not different from that of patients with definite myocardial infa rction. To guide therapeutic decisions on these patients a troponin T test result needs to be available rapidly. The rapid troponin T test s trip assay, which allows the determination of troponin T levels in who le blood at the patient's bedside, can be performed conveniently in th e emergency room or in laboratories with less sophisticated equipment and has the potential to aid in the triage of chest pain patients and the selection of therapeutic strategies.