The diagnostic value of R-wave amplitude changes during exercise testing
Janota, M.; Fabián, J.; Rohác, J.; Belán, A.
Cor et Vasa 25(3): 168-176
1983
ISSN/ISBN: 0010-8650 PMID: 6617208 Document Number: 210296
Exercise ECG, coronary arteriography and left ventriculography were performed in 200 patients with suspected or confirmed coronary artery disease (CAD). The authors compared the diagnostic value of R wave amplitude changes and ST segment depressions in V5. Evaluation of the results showed a near uniform sensitivity of the two methods. R wave amplitude changes in V5 did not correlate with the presence and degree of CAD nor with the number of affected coronary arteries. In contrast to the absence of a definite correlation with topical left ventricular dysfunction there was a correlation with the ejection fraction. The study showed that in some instances R wave amplitude changes may complement the evaluation of exercise testing based on ST segment depressions. Yet, R wave amplitude changes alone during exercise testing lack a sufficient predictive accuracy for being adopted as a routine criterion of coronary insufficiency.