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The maximal exercise ECG in asymptomatic men.

G R Cumming, L Borysyk, C Dufresne

    Canadian Medical Association Journal
    |March 18, 1972
    PubMed
    Summary
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    Asymptomatic men with abnormal exercise electrocardiograms (ECGs) show a significantly higher risk of developing coronary heart disease. This study highlights the predictive value of exercise ECGs in identifying at-risk individuals.

    Area of Science:

    • Cardiology
    • Preventive Medicine
    • Exercise Physiology

    Background:

    • Exercise electrocardiography (ECG) is a key tool for assessing cardiovascular health.
    • Identifying asymptomatic individuals at risk for coronary heart disease (CHD) is crucial for preventive strategies.

    Purpose of the Study:

    • To evaluate the relationship between exercise-induced ECG changes and the development of clinical coronary heart disease in asymptomatic men.
    • To determine the predictive value of an abnormal exercise ECG in this population.

    Main Methods:

    • A cohort of 510 asymptomatic males aged 40-65 underwent maximal bicycle ergometer exercise testing.
    • Exercise ECGs were analyzed for ischemic changes.
    • Correlation with resting ECG, blood pressure, cholesterol, obesity, and fitness levels was assessed.

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    Main Results:

    • Ischemic ECG changes were observed in 61 subjects, with frequency increasing with age.
    • Subjects with abnormal exercise ECGs had more frequent minor resting ECG changes, resting hypertension, and high cholesterol.
    • No significant differences were found in obesity, low fitness, or post-exercise systolic blood pressure.

    Conclusions:

    • An abnormal exercise ECG in asymptomatic men is associated with a 2.5 to over 30 times higher incidence of clinical coronary heart disease.
    • Exercise ECG abnormalities are a significant predictor of future cardiovascular events.