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Exercise-Induced Electrocardiographic Changes in Healthy Young Males with Early Repolarization Pattern.
Loránd Kocsis1,2, Zsuzsanna Pap2, Szabolcs Attila László3
1Department of Cardiology, Clinical County Hospital Mures, 540103 Targu Mures, Romania.
Diagnostics (Basel, Switzerland)
|May 24, 2024
Summary
Exercise alters electrocardiogram (ECG) patterns in individuals with early repolarization pattern (ERP). This study found slowed intra-atrial conduction during exercise in the ERP group, potentially predicting atrial arrhythmias.
Area of Science:
- Cardiology
- Exercise Physiology
- Electrophysiology
Background:
- Early repolarization pattern (ERP) is a common ECG finding.
- Exercise-induced changes in ECG parameters in ERP individuals are not well understood.
- Potential links between ERP, exercise, and arrhythmogenesis require investigation.
Purpose of the Study:
- To evaluate exercise-induced ECG modifications in individuals with ERP.
- To explore the association between these modifications and arrhythmogenesis.
- To compare ECG parameters during rest, peak exercise, and recovery between ERP and control groups.
Main Methods:
- Recruited 23 young, healthy males with ERP (ERP+) and 19 healthy males without ERP (ERP-).
- Performed ECG analysis at baseline, peak exercise (Bruce protocol), and recovery.
- Compared ECG parameters including P-wave duration, QRS duration, QT interval, and J-wave presence between groups.
Main Results:
- Baseline ECGs showed shorter QRS and QT intervals in the ERP+ group.
- During exercise and recovery, the ERP+ group exhibited significantly longer P-wave duration and narrower QRS complex.
- J waves characteristic of ERP disappeared during exercise in the ERP+ group.
Conclusions:
- Slowed intra-atrial conduction during exercise in ERP individuals may predict atrial arrhythmogenesis.
- The disappearance of J waves during exercise, attributed to increased sympathetic activity, holds clinical significance.
- Exercise stress testing can reveal important electrophysiological changes in individuals with ERP.
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