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Related Experiment Videos

PR interval in the aged

A N Clark, A H Craven

    Age and Ageing
    |August 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    In geriatric patients, abnormal ECGs correlate with longer PR intervals, particularly in men. Age does not show a gradual PR interval increase, but rather a sudden rise around 75-80 years old.

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    Area of Science:

    • Cardiology
    • Geriatric Medicine
    • Electrocardiography

    Background:

    • The PR interval on an electrocardiogram (ECG) reflects cardiac conduction time.
    • Understanding factors influencing PR interval duration in the elderly is crucial for diagnosing cardiac conditions.

    Purpose of the Study:

    • To investigate the relationship between PR interval length and age, sex, and ECG abnormalities in geriatric patients.
    • To determine if PR interval changes in the elderly are due to aging or other factors.

    Main Methods:

    • Analysis of PR interval duration in 691 geriatric in-patients.
    • Correlation of PR interval with patient age, sex, and presence of abnormal ECG tracings.

    Main Results:

    • No significant difference in PR interval was found based on sex or ECG abnormality alone.

    Related Experiment Videos

  • Abnormal ECG tracings were associated with longer PR intervals, most notably in men.
  • A sudden increase in PR interval duration was observed between 75 and 80 years of age, not a gradual age-related lengthening.
  • Short PR intervals (Lown-Ganong-Levine type) were found in 3.8% of patients, and long PR intervals (>0.22 s) in 2.7%.

    • Conclusions:

    • PR interval lengthening in the elderly appears linked to acquired conditions and disease, not the aging process itself.
    • Short PR intervals are not uncommon in the elderly population.
    • Sex and ECG abnormality interact to influence PR interval duration, with men showing more pronounced effects with abnormal tracings.