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Common electrocardiogram variations pre- and post-marathon.
John P Martin-Beaulieu1, Karen M Myrick2, Thomas Martin3
1Department of Nursing Quinnipiac University North Haven Campus, 370 Bassett Rd - Room 470M North Haven Connecticut 06473 USA.
Electrocardiographic changes are common in marathon runners but often benign. These findings, like incomplete right bundle branch block, can be mistaken for serious heart conditions by healthcare providers.
Area of Science:
- Cardiology
- Sports Medicine
- Exercise Physiology
Background:
- Athletes, particularly endurance athletes like marathon runners, exhibit unique physiological adaptations.
- Electrocardiography (ECG) is a standard tool for assessing cardiac health.
- Interpreting ECG findings in athletes requires specialized knowledge to differentiate normal adaptations from pathology.
Observation:
- Marathon runners frequently present with specific electrocardiographic (ECG) findings.
- These ECG patterns can mimic cardiac abnormalities.
- Common findings include incomplete right bundle branch block, early ventricular repolarization, and voltage criteria for left ventricular hypertrophy.
Findings:
- The observed ECG changes in marathon runners are generally benign adaptations to intense training.
- Incomplete right bundle branch block (iRBBB) is a common finding in athletes.
- Early repolarization (ER) and left ventricular hypertrophy (LVH) by voltage criteria are also prevalent and typically not indicative of disease.
Implications:
- Misinterpretation of these benign ECG findings can lead to unnecessary investigations and patient anxiety.
- Healthcare providers need to be aware of athlete's heart ECG patterns.
- Distinguishing physiological adaptations from pathological conditions is crucial for appropriate clinical management of athletes.
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