COMPARATIVE STUDY
JOURNAL ARTICLE
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Continuous 12-lead electrocardiographic ST monitoring adds prognostic information to the thrombolysis in myocardial infarction risk score in patients with non-ST-elevation acute coronary syndromes.

BACKGROUND: Continuous 12-lead electrocardiographic (ECG) ST monitoring and the Thrombolysis In Myocardial Infarction Risk Score (TIMI-RS), both have been shown to be useful for early risk stratification in patients with non-ST elevation acute coronary syndromes (NSTACS).

HYPOTHESIS: Transient ST ischemic events, detected by continuous 12-lead ECG ST monitoring, early in the course of NSTACS, may add prognostic information to the TIMI-RS.

METHODS: In all, 567 consecutive patients with a NSTACS underwent 24-h continuous 12-lead ECG ST monitoring. An ST ischemic event was defined as a transient ST shift in any lead of > or = 0.10 mV compared with the reference ECG, lasting for > or = 1 min.

RESULTS: The incidence of the composite of death, nonfatal myocardial infarction (or reinfarction) and recurrent ischemia by Day 14 was 22.2%. By Day 30, the incidence of the composite of death and nonfatal myocardial infarction (or reinfarction) was 14.7%. There was a significantly increased risk of 14-day (p value for trend < 0.001) or 30-day (p value for trend <0.001) composite endpoint with increasing of TIMI-RS. Moreover, the occurrence of > or = 1 ST shifts during ST monitoring was associated with a significantly increased risk of 14- (p value < 0.001) or 30-day (p value < 0.001) composite endpoint, and this was true throughout the groups of TIMI-RS.

CONCLUSIONS: The present study suggests that continuous 12-lead ECG ST monitoring, early in the course of NSTACS, may serve as an affordable tool to add prognostic information to the TIMI-RS.

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