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Updated: Aug 12, 2026
Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
How many myocardial infarctions should we rule out?
R L Wears1, S Li, J D Hernandez
1Department of Surgery, University of Florida, Jacksonville.
Insights
Computer simulations reveal that less intensive care strategies for acute myocardial infarction (AMI) save money but increase mortality. Optimal admission decisions balance cost-effectiveness with patient outcomes, suggesting higher false-positive rates may be acceptable.
Area of Science:
- Cardiology
- Health Economics
- Decision Analysis
Background:
- Acute myocardial infarction (AMI) management involves complex decisions regarding patient admission and care intensity.
- Current admitting strategies vary, impacting healthcare costs and patient outcomes.
Purpose of the Study:
- To estimate the impact of four different admitting strategies on cost, mortality, and admission accuracy for AMI patients.
- To determine optimal admission threshold probabilities and acceptable false-positive rates.
Main Methods:
- Computer simulation modeling was employed to analyze four admitting strategies: coronary care unit, intermediate care unit, routine ward care, and outpatient follow-up.
- The simulation evaluated cost, patient outcomes, admission threshold probabilities, and false-positive admission rates.
Main Results:
- Less intensive care strategies were found to be more cost-effective but led to increased mortality and decreased life expectancy.
- Analysis suggested that optimal strategy selection involves identifying a cost-effectiveness cutoff (e.g., $1-2 million per life saved).
- Acceptable false-positive admission rates could range from 70% to 80%, indicating that overly restrictive policies may be suboptimal.
Conclusions:
- Admitting strategies for AMI should be chosen based on a balance between cost savings and patient life expectancy.
- The findings suggest that clinicians may be closer to optimal decision-making than previously assumed, with potentially higher acceptable false-positive rates.
- These insights can inform evidence-based guidelines for AMI patient management and resource allocation.
Abstract:
We used computer simulation to estimate the consequences of four admitting strategies (coronary care unit, intermediate care unit, routine ward care, or outpatient follow-up) on cost, outcome, admission threshold probabilities, and false-positive admission rates for patients with acute myocardial infarction. At virtually any probability of acute myocardial infarction, replacing more intensive by less intensive strategies saved money but increased mortality and decreased life expectancy. Therefore, choices among strategies may be made by using the most effective strategy for progressively lower and lower risk patients until the additional cost per additional life saved reaches a cutoff value; then, a less expensive strategy is selected. With sample cutoff values of $1 and $2 million per life saved, the marginal threshold admission probabilities were: (table; see text) These results imply that the acceptable proportion of false-positive admissions may be as high as 70% to 80%; lower rates could indicate excessively restrictive admitting policies. Clinicians may be operating closer to the optimal decision point than has previously been asserted.
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