Objective: To explore the significance of QT variability in myocardial ischemia.
Methods: Twenty-four-hour QT interval variability in 37 patients with myocardial ischemia and 42 patients without myocardial ischemia were measured with 24-hour Holter recordings.
Results: QT interval variability in patients with myocardial ischemia was larger than that in patients without myocardial ischemia.
Conclusion: Myocardial ischemia can influence QT interval variability.