Correlation of QT Dispersion after Exercise Stress-Test with Coronary

Authors

  • P. Ammann Department of Internal Medicine
  • I. Bluzaite Department of Internal Medicine
  • H. Roelli Department of Internal Medicine
  • W. Korte Department of Internal Medicine
  • H. Rickli Department of Internal Medicine
  • J. Brazdzionyte Kaunas University of Medicine
  • G. Urbonaviciene Kaunas University of Medicine
  • R. Zaliunas Kaunas University of Medicine

Abstract

The aim of this study was to determine if QTD and heart rate corrected QT dispersion (QTcD) are related to coronary artery disease (CAD). We prospectively assessed QT intervals from electrocardiograms (ECG) at rest and immediately after bicycle stress-test, in 94 patients. In 67 patients (age 62.1 ± 11.7y; 59m/8f) relevant CAD (stenoses > 50%) was assessed. 27 patients (age 61.1 ± 10.2 y; 10m/17f) showed normal coronary arteries. There were no significant differences between patients with or without CAD in QTD at rest. However, QTD (30ms(20-40) vs. 20 ms (5-30); p=0.006) and QTcD (40 ms (23.5-51.5) vs. 29 ms (6.5-38); p = 0.006) assessed immediately after stress-test were significantly longer in CAD. Sensitivity of QTcD to predict CAD (cut off of QTcD ≥ 40 ms) was higher (50.7%) as compared to ST-depression on ECG (38.8%), whereas specificity was lower (74.1% vs. 92.6%). Ill. 4, bibl. 9 (in English; summaries in Lithuanian, English and Russian).

Author Biographies

P. Ammann, Department of Internal Medicine

I. Bluzaite, Department of Internal Medicine

H. Roelli, Department of Internal Medicine

W. Korte, Department of Internal Medicine

H. Rickli, Department of Internal Medicine

J. Brazdzionyte, Kaunas University of Medicine

G. Urbonaviciene, Kaunas University of Medicine

R. Zaliunas, Kaunas University of Medicine

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Published

2004-02-08

How to Cite

Ammann, P., Bluzaite, I., Roelli, H., Korte, W., Rickli, H., Brazdzionyte, J., Urbonaviciene, G., & Zaliunas, R. (2004). Correlation of QT Dispersion after Exercise Stress-Test with Coronary. Elektronika Ir Elektrotechnika, 51(2). Retrieved from https://eejournal.ktu.lt/index.php/elt/article/view/10967

Issue

Vol. 51 No. 2 (2004)

Section

T 115 MEDICINE TECHNOLOGY

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