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The diagnostic value of R-wave amplitude changes during exercise testing
Cor Et Vasa
|January 1, 1983
Summary
R wave amplitude changes during exercise testing show similar sensitivity to ST segment depressions but lack predictive accuracy for coronary artery disease. These changes may complement ST segment analysis but are insufficient alone for routine diagnosis.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Exercise Physiology
Background:
- Coronary artery disease (CAD) diagnosis relies on various methods.
- Exercise electrocardiography (ECG) is a key diagnostic tool.
- Evaluating novel ECG parameters like R wave amplitude changes is crucial.
Purpose of the Study:
- To compare the diagnostic value of R wave amplitude changes versus ST segment depressions in V5 during exercise ECG.
- To assess the correlation of R wave amplitude changes with CAD severity and left ventricular function.
Main Methods:
- Exercise ECG, coronary arteriography, and left ventriculography in 200 patients with suspected or confirmed CAD.
- Comparative analysis of R wave amplitude changes and ST segment depressions in V5.
Main Results:
- R wave amplitude changes and ST segment depressions demonstrated similar sensitivity for detecting CAD.
- R wave amplitude changes did not correlate with CAD presence, severity, or number of affected coronary arteries.
- R wave amplitude changes correlated with ejection fraction but not topical left ventricular dysfunction.
Conclusions:
- R wave amplitude changes can complement ST segment depressions in exercise testing for CAD evaluation.
- R wave amplitude changes alone lack sufficient predictive accuracy for routine diagnosis of coronary insufficiency.