Key result
Methodological approaches for measuring the QT interval on a standard electrocardiogram include manual verification of automated measurements and utilizing the spline QTc formula for heart rate correction.
Why the study?
Both increases and decreases in QT interval duration are associated with risks of polymorphic ventricular tachycardia and sudden cardiac death, necessitating proper measurement and evaluation on standard electrocardiograms.
Provides methodological recommendations for measuring and evaluating the QT interval on standard electrocardiograms based on literature analysis.
QT assessment in every ECG warrants attention for arrhythmia risk; leaves open optimal standardization pending higher-level validation.
Interpretation of each electrocardiogram should include measurement and evaluation of the QT interval, because both an increase and a decrease in its duration are associated with a risk of polymorphic ventricular tachycardia and sudden cardiac death. This article reflects the methodological approaches to determining, measuring and evaluating the duration of the QT interval, describes the nature of its dependence on gender, age and heart rate of the patient, andalso describes a number of indicators calculated on its basis. Recommendations for measuring and evaluating the QT interval of a standard electrocardiogram have been formulated on the basis of the literature analysis.
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Kalatsei et al. (2019) conducted a review in QT interval measurement and evaluation. QT interval measurement methodologies was evaluated. Methodological approaches for measuring the QT interval on a standard electrocardiogram include manual verification of automated measurements and utilizing the spline QTc formula for heart rate correction.
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