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  • Title: [Study on the clinical value of serum cardiac troponin T in early diagnosing of acute non-Q-wave myocardial infarction and prognostic evaluation].
    Author: Zheng Q, Wang WZ, Zhang YX, Wang L, Zhao LJ.
    Journal: Zhongguo Wei Zhong Bing Ji Jiu Yi Xue; 2004 Mar; 16(3):179-81. PubMed ID: 15009972.
    Abstract:
    OBJECTIVE: To investigate the value of serum cardiac troponin T (cTnT) in diagnosing earlier acute non-Q-wave myocardial infarction (NQMI) and judging the prognosis. METHODS: Seventy-four NQMI patients and 118 Q-wave myocardial infarction (QMI) patients were studied. Serum cTnT and MB isoenzyme of creatine kinase (CK-MB) levels were monitored on fixed time. On the 15th day of hospitalization, 99 mTc-MIBI myocardial single photon emission computed tomography (SPECT) was performed to assess the infarct size index. Clinical informations of the two groups such as cardiac dysfunction, re-infarction, fatal cadiac arrhythmia, sudden death were collected. RESULTS: The time for serum cTnT beginning to rise was earlier than CK-MB. Its peak time value was paralled to that of CK-MB, and cTnT elevation lasted longer than CK-MB. Serum cTnT and CK-MB peak value showed positive correlation with the infarct size index (both P<0.01). The peak values of cTnT and CK-MB in NQMI group were lower than those in QMI group, and the infarct size was smaller than QMI group (all P<0.05). The frequencies of cardiac events were significantly raised in both groups when there was a high level of serum cTnT. But the proportion in NQMI group was less than those in QMI group (P<0.05). The cardiac events in NQMI group were less than that in QMI group (P<0.05). CONCLUSION: Serum cTnT is an effective marker for diagnosing earlier NQMI, detecting myocardial damage, estimating infarct size and prognosis in the nearly future.
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