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Pre- and post-exercise electrocardiogram pattern modifications in apparently healthy school adolescents in Cameroon
Jerson Mekoulou Ndongo1, Peguy Brice Assomo Ndemba1, Abdou Temfemo1,2
1Exercise and Sport Physiology and Medicine Unit, Faculty of Science, University of Douala, Douala, Cameroon.
International Journal of Adolescent Medicine and Health
|August 6, 2017
Summary
Physical Education and Sport (PES) exercise can trigger cardiac abnormalities in adolescents. These changes, including arrhythmias and repolarization issues, may increase the risk of sudden cardiac death (SCD) during physical activity.
Area of Science:
- Sports Medicine
- Cardiology
- Adolescent Health
Background:
- Physical Education and Sport (PES) is mandatory in Cameroon.
- Cardiac accidents and sudden cardiac deaths (SCD) have occurred during PES examinations.
- Investigating exercise-induced ECG changes in adolescents is crucial for prevention.
Purpose of the Study:
- To analyze pre- and post-exercise electrocardiogram (ECG) pattern modifications in apparently healthy Cameroonian school adolescents.
- To identify ECG abnormalities associated with the risk of SCD following exercise.
Main Methods:
- 100 healthy adolescents (18±2 years) underwent intermittent sprint-endurance tests.
- 12-lead ECGs were recorded before and 5 minutes after exercise.
- ECG changes were analyzed for SCD risk indicators.
Main Results:
- Resting ECG variants (bradycardia, sinus arrhythmia) resolved post-exercise.
- Exercise increased QTc and heart rate (HR), and decreased RR interval (p<0.001).
- Post-exercise ECG showed T-wave inversions (V2-V4), premature beats, and new-onset hypertrophy/enlargement in some participants.
Conclusions:
- Intermittent exercise can induce cardiac abnormalities in seemingly healthy adolescents.
- These exercise-induced ECG changes may pose a risk for cardiac events and SCD.
- Findings highlight the need for cardiac monitoring during physical education activities.
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