## Hypothesis: Serial creatine kinase-mb (ck-mb) levels provide more accurate predictive information regarding myocardial infarction than serial ecgs in emergency department patients with chest discomfort and no st-segment elevation on the initial ecg. ## Design: Prospective, observational study.
Decision rules for the ECG diagnosis of inferior myocardial infarction
✍ Scribed by O. Pahlm; D. Case; G. Howard; J. Pope; W.K. Haisty
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 725 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0010-4809
No coin nor oath required. For personal study only.
✦ Synopsis
ECG measurements from 341 patients with inferior myocardial infarction (IMU and 327 normal subjects were used to develop and test decision rules for the ECG diagnosis of IMI. Recursive partitioning provided a simple decision rule with 75% sensitivity and 97% specificity, using Q amplitude and Q duration in aVF, Q duration in III, and T-wave axis in the frontal plane as decision variables. Dropping T-wave axis from the decision rule led to a 10% decrease in sensitivity. Multiple logistic regression provided sensitivities and specilicities which were similar to those for recursive partitioning. Both methods outperformed traditional noncontour criteria for IMI. ar
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