Key result
Treadmill exercise testing in healthy children significantly shortened the QT interval by 24.6% and decreased diastolic time more than systolic time (43.79% vs 33.74%, p<0.001).
Why the study?
Studies covering all atrial and ventricular depolarization and repolarization ECG parameters during exercise in normal children were lacking.
Does treadmill exercise testing significantly alter electrocardiographic parameters, and how do different heart rate correction formulas compare in healthy children?
Observational (n=74)
No
Does treadmill exercise testing significantly alter electrocardiographic parameters, and how do different heart rate correction formulas compare in healthy children?
Absolute Event Rate: 43.79% vs 33.74%
p-value: p=<0.001
In healthy children, exercise significantly alters ECG amplitudes and durations, and different heart rate correction formulas yield significantly different QTc values, highlighting the need for formula-specific nomograms to avoid misdiagnosis of long QT syndrome.
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Normative exercise ECG data in healthy children may refine interpretation; leaves open validation and utility in congenital heart disease.
Rad et al. (2021) conducted an observational in Healthy children (n=74). Treadmill exercise testing vs. Pre-exercise baseline was evaluated on Percentage of decrease in ECG-derived estimated duration of diastole versus systole (p=<0.001). Treadmill exercise testing in healthy children significantly shortened the QT interval by 24.6% and decreased diastolic time more than systolic time (43.79% vs 33.74%, p<0.001).
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