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  • Title: [Prognostic value of C-reactive protein and troponin T level in patients with unstable angina pectoris].
    Author: Tanaka H, Tsurumi Y, Kasanuki H.
    Journal: J Cardiol; 2006 Apr; 47(4):173-9. PubMed ID: 16637251.
    Abstract:
    OBJECTIVES: The prognosis of unstable angina pectoris may be more accurately predicted by the combination of C-reactive protein (CRP), which is a known inflammation marker, and troponin T (TnT), which is used for risk assessment for the prognosis of acute coronary syndrome. The present study investigated the correlations between pathophysiology and prognosis of severe unstable angina pectoris and CRP and TnT levels. METHODS: The correlation between CRP at admission and the prognosis was studied in 367 patients with severe unstable angina pectoris (Braunwald type II and III) who were admitted to our hospital between January 1998 and December 2000. The in-hospital and long-term prognosis was investigated in TnT-positive patients. In-hospital cardiac events were defined as death, myocardial infarction, heart failure and angina attacks during hospitalization. Long-term cardiac events were defined as death, myocardial infarction, heart failure and recurrence of angina. RESULTS: The incidence of in-hospital cardiac events in all patients was 30.2%. The CRP levels were higher in patients with cardiac events (0.97 +/- 2.67 vs 0.53 +/- 1.29 mg/d/, p = 0.057), but there was no significant difference between the two groups. The incidence of long-term cardiac events was 26.8%. The mean CRP level was significantly higher in patients with cardiac events than in patients without cardiac events (1.17 +/- 1.86 vs 0.43 +/- 1.14 mg/dl, p = 0.098). In TnT-positive patients (TnT > 0.1 ng/ml, 23% of all patients), the incidence of in-hospital cardiac events was 47.6% (p < 0.0001), significantly higher than that in all patients. TnT-positive patients with CRP levels of 0.5 mg/dl or higher (8% of all patients) had a markedly higher incidence of in-hospital cardiac events of 56.7% (p = 0.001) and long-term cardiac events of 46.7% (p = 0.01). CONCLUSIONS: CRP levels were useful in prediction of the long-term prognosis. TnT levels were useful in prediction of in-hospital prognosis. The present study suggested the possibility that the combined use of these biological markers could predict the prognosis of patients with unstable angina at early stage and more accurately.
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