Related Experiment Videos
Risk for early ischemic event after acute myocardial infarction in working males
Paul Froom1, Dafna Gofer, Valentina Boyko
1National Institute of Occupational and Environmental Health, Raanana, Israel. paulf@ioh.org.il
Insights
Predicting recurrent cardiovascular events after acute myocardial infarction (AMI) is crucial for return-to-work decisions. The primary risk factor identified was time since hospital discharge, not clinical variables.
Area of Science:
- Cardiology
- Occupational Health
- Public Health
Background:
- Acute myocardial infarction (AMI) poses significant risks for recurrent cardiovascular events post-discharge.
- Occupational physicians require reliable data to guide return-to-work decisions for AMI survivors.
Purpose of the Study:
- To predict ischemic events in the weeks following hospital discharge after AMI.
- To inform occupational physicians about return-to-work timing for AMI patients.
Main Methods:
- A cohort of 1299 AMI patients from 14 Israeli coronary care units were followed post-discharge.
- Follow-up occurred at 1, 2, 4, 6, 9, and 12 months, recording cardiovascular accidents.
- Logistic regression was used to identify predictors of recurrent events.
Main Results:
- The rate of first recurrent cardiovascular accidents decreased rapidly in the initial weeks post-discharge.
- The risk in the third week was 13.4 times higher than after 10 weeks, when incidence stabilized.
- Key predictors like age and prior cerebrovascular events had limited predictive power (AUC 64.4%).
Conclusions:
- Time elapsed since hospital discharge is the primary determinant of recurrent event risk after AMI.
- Clinical variables were less significant predictors compared to the time factor.
- This finding is critical for establishing appropriate return-to-work timelines for AMI patients.
Abstract:
We attempt to predict ischemic events in the weeks following the hospital discharge after acute myocardial infarction (AMI) in order to aid occupational physicians in taking return-to-work decisions. Included in the study were 1299 AMI patients from 14 coronary care units in Israel who had been employed before hospitalization and were seen after discharge 1, 2, 4, 6, 9 and 12 months after the first AMI. Cardiovascular accidents included death from cardiovascular disease, recurrent infarction or hospitalization due to congestive heart failure or unstable angina. The rate of a first recurrent cardiovascular accident decreased rapidly over the first few weeks. The risk in the third week was still 51 per 1000 person-months, 13.4 (95% CI: 9.2-19.5) times higher than that after 10 weeks when the incidence reached a low steady state. The major predictors in a logistic regression model for an event were: older age, past history of a cerebrovascular event, and congestive heart failure during the course of hospitalization, but the area under the receiver-operator curve was only 64.4%. We conclude that after acute myocardial infarction, the major risk for a recurrent event is a lapse of time from discharge but not other clinical variables. This should be taken into account when considering a proper timing of return-to-work after an acute myocardial infarction.