Cin, V. G.Çelik, M.Ulucan, S.2020-03-262020-03-261997Cin, V. G., Çelik, M., Ulucan, S., (1997). QT Dispersion Ratio in Patients with Unstable Angina Pectoris (A New Risk Factor?). Clinical Cardiology, 20(6), 533-535.0160-9289https://dx.doi.org/10.1002/clc.4960200605https://hdl.handle.net/20.500.12395/16592Background: QT dispersion has been shown to be associated with fatal arrhythmias and sudden death in coronary artery disease. A recent study indicated that marked QT dispersion in electrocardiograms (ECGs) obtained during acute ischemia demonstrated a significant correlation with ventricular fibrillation. Hypothesis: This study investigated the ECG parameters for repolarization (QT dispersion, corrected QT, corrected QT dispersion, and QT dispersion ratio) and their interrelation with acute ischemia. Methods: QT parameters as well as a newly developed repolarization index, QT dispersion ratio [(QT dispersion/RR interval)x100] were calculated digitally during rest and ischemia in 32 patients with coronary artery disease (rest angina, Braunwald class III). Results were correlated with clinical consequences, mainly arrhythmias, within a follow-up period of 5 +/- 2 days. Results: While most patients had an increase in all four parameters, only the QT dispersion ratio showed a significant difference when correlated with ventricular arrhythmias (p < 0.001,F ratio = 38). Conclusion: QT dispersion ratio appears to be a new and promising parameter in predicting ventricular arrhythmias in patients with acute ischemia.en10.1002/clc.4960200605info:eu-repo/semantics/openAccessQT DispersionUnstable AnginaAcute IschemiaArticle2065335359181263Q2WOS:A1997XB92900005Q2