Key result
QT dispersion was significantly higher in patients with coronary artery disease compared to controls and increased progressively with the number of diseased vessels and Gensini score.
Why the study?
QT dispersion increases during episodes, but its relationship with the severity of coronary artery disease, myocardial ischemia, and infarction in patients with stable angina needed determination.
Does the severity of coronary artery disease and left ventricular dysfunction correlate with increased QT dispersion in patients with suspected CAD?
Population
214 patients undergoing diagnostic coronary angiography for suspected CAD
Comparison
184 patients with CAD vs 30 controls with normal coronary angiograms
Authors
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QT dispersion may mark CAD severity; hypothesis-generating, requires prospective validation before clinical use.
Cross-Sectional (n=214)
No
Does the severity of coronary artery disease and left ventricular dysfunction correlate with increased QT dispersion in patients with suspected CAD?
p-value: p=<0.05
QT dispersion on a standard resting ECG is significantly increased in patients with coronary artery disease and correlates independently with disease severity, left ventricular dysfunction, and prior myocardial infarction.
Mohammed AL-Myahi (2020) conducted a cross-sectional in Coronary Artery Disease (n=214). Coronary artery disease severity vs. Normal coronary angiogram was evaluated on QT dispersion (QTD) (p=<0.05). QT dispersion was significantly higher in patients with coronary artery disease compared to controls and increased progressively with the number of diseased vessels and Gensini score.
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