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Exponential Modeling and Confidence Interval Analysis Reveal Limited Precision of History, Electrocardiogram, Age,
1Interventional Cardiology, National Park Medical Center, Hot Springs, USA.
Abstract:
Using exponential modeling and confidence interval (CI) analysis, this report evaluates the internal risk behavior of the history, electrocardiogram, age, risk factors, and troponin (HEART) score. The exponential model major adverse cardiac event (MACE %) = 0.79 × e(0.44·HEART) (R²≈0.99) demonstrates substantial CI overlap across HEART 1-3. Only HEART 0-1, combined with non-ischemic ECG and serial negative high-sensitivity troponins, reliably satisfies the American College of Cardiology/American Heart Association (ACC/AHA) <1% 30-day MACE definition. These findings refine the interpretation of intermediate HEART strata and clarify guideline-aligned use.
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