Is silent ischemia on the routine admission ECG an important finding?
S L Bridges1, J S Hollowell, S W Stagg
1Department of Internal Medicine, University of Texas Medical Branch, Galveston.
Journal of Electrocardiology
|April 1, 1993
Summary
Electrocardiogram (ECG) changes indicating silent ischemia in patients without coronary artery disease predict a higher risk of cardiac events or death. This finding highlights the importance of ECG screening for early risk identification.
Area of Science:
- Cardiology
- Diagnostic Medicine
- Preventive Cardiology
Background:
- Coronary artery disease (CAD) risk factors are prevalent in the general population.
- Silent ischemia, detected via electrocardiogram (ECG) changes, may indicate underlying cardiac issues.
- Early identification of high-risk patients is crucial for timely intervention.
Purpose of the Study:
- To investigate if ST-T changes suggestive of silent ischemia on admission ECGs identify high-risk patients.
- To assess the association between silent ischemia on ECG and cardiac events or death in patients without known CAD.
Main Methods:
- Prospective cohort study at a tertiary care university hospital.
- Screening of all admitted patients over a 5-month period.
- Comparison of outcomes between patients with (ischemia group) and without (control group) silent ischemia on admission ECGs, matched for CAD risk factors.
Main Results:
- The silent ischemia group (n=54) showed a significantly higher incidence of cardiac events or death within 3 weeks (13%) compared to the control group (1%) (p < 0.02).
- At 6 months, 15% of the silent ischemia group experienced cardiac events versus 3% in the control group (p = 0.02).
Conclusions:
- Silent ischemia on admission ECG is a significant predictor of adverse cardiac events and death in patients with CAD risk factors but no known CAD.
- Admission ECG findings of silent ischemia can aid in stratifying risk and guiding management in asymptomatic individuals.
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