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Related Experiment Videos

Fever and cardiac rhythm.

J Karjalainen, M Viitasalo

    Archives of Internal Medicine
    |June 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Fever significantly increases heart rate and can alter cardiac conduction, with potential for supraventricular extrasystoles. Complications may arise if atrioventricular conduction or QT intervals prolong during febrile illness.

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    Area of Science:

    • Cardiology
    • Infectious Disease

    Background:

    • Acute febrile infections can impact cardiovascular function.
    • Understanding fever's effects on the heart is crucial for managing illness.

    Purpose of the Study:

    • To investigate the effects of fever on cardiac rhythm and conduction.
    • To identify potential cardiac complications associated with febrile infections.

    Main Methods:

    • 24-hour electrocardiograms were recorded in 27 young men during acute febrile illness and after recovery.
    • Axillary temperature and heart rate were monitored.
    • Analysis included PR interval, QT interval, and extrasystole frequency.

    Main Results:

    • Heart rate increased by 8.5 beats per minute for every 1 degree C rise in temperature.

    Related Experiment Videos

  • PR and QT intervals shortened during fever.
  • Supraventricular extrasystoles increased in some patients during fever, while ventricular extrasystoles did not.
  • Atrioventricular blocks were rarer during fever.

    • Conclusions:

    • Fever elevates heart rate and alters cardiac conduction, generally not leading to serious complications in uncomplicated infections.
    • Prolonged atrioventricular conduction, QT interval changes, or frequent ventricular extrasystoles during fever may indicate complications.
    • Close cardiac monitoring is advised during febrile illnesses, especially if concerning arrhythmias develop.