A new coronary artery disease index of treadmill exercise electrocardiograms based on the step-up diagnostic method

Exercise Electrocardiogram Testing

“…Recovery phase behavior of other potential ECG markers of ischemia, such as QRS duration, Athens QRS score, and QT-interval derivatives, also deserve careful attention. 90,96 -98 As shown by Koide et al 67 for complementary performance of ST depression and Athens QRS score, it is reasonable to predict that combinations of these methods should be capable of improving the performance of the exercise ECG for the detection of those patients who have demand-induced ischemia. Accordingly, we believe that continued development and multicenter evaluation of the applied value and limitations of these newer methods are warranted.…”

“…64,65 Subsequent studies indicated value of the Athens score for the detection of restenosis and for ischemia after bypass surgery. 66 Koide et al 67 demonstrated that the Athens QRS score added complementary diagnostic information to ST-segment depression.…”

The prognostic value of a QRS score during exercise testing

“…11 QRS-score values have been shown to be unrelated to exercise-induced ST segment and they have a higher predictive accuracy in patients with CAD, as reported in previous studies. [3][4][5] In particular, negative (< 0) scores were always associated with CAD, while a QRS score < 5 mm predicted CAD with sensitivity ranging from 75 to 86% and specificity ranging from 73 to 79%, values significantly higher than those of ST-segment depression (62 and 70%). Moreover, applying the Bayes' theorem, the combination of an abnormal QRS-score and ST-segment depression resulted in the highest post-test risk for CAD, and a normal QRS score without ST-segment depression in the lowest post-test risk.…”

Assessment of ischemia by using dobutamine stress echocardiography test in patients with isolated ST depression in inferior leads demonstrated during channel treadmill exercise electrocardiography test

“…20 Yasushi ve arkadaşları ST segmenti depresyonuna göre yaptıkları çalışmada, TMET duyarlılığını %66, özgüllüğünü %73 bulmuşlardır. 21 Wu ve arkadaş-ları ise duyarlılığı %76, özgüllüğü %38 buldular. 22 Hennessy ve arkadaşları TMET ve DSET karşılaştır-masında DSET duyarlılığını (%82), TMET duyarlılı-ğından (%40) daha yüksek bulmuşlardır.…”