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Induced hypothermia: electrocardiographic abnormalities.

J I Martinez-Lopez

    Southern Medical Journal
    |December 1, 1976
    PubMed
    Summary
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    Intermittent hypothermia to treat high fever caused reversible ECG changes. These included slow heart rate, prolonged Q-T interval, and Osborn waves, which resolved upon rewarming.

    Area of Science:

    • Cardiology
    • Critical Care Medicine
    • Physiology

    Background:

    • Hyperpyrexia, or extremely high fever, can be life-threatening.
    • Therapeutic hypothermia is sometimes used to manage hyperpyrexia.
    • Electrocardiogram (ECG) monitoring is crucial during induced hypothermia.

    Observation:

    • A patient undergoing intermittent hypothermia for hyperpyrexia was monitored via ECG.
    • Specific ECG abnormalities were noted during the induced hypothermic state.

    Findings:

    • The ECG showed pronounced sinus bradycardia (slow heart rate).
    • Marked prolongation of the Q-T interval was observed.
    • Characteristic Osborn waves and muscle tremor artifacts were present.

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    Implications:

    • These ECG alterations are typical during therapeutic hypothermia.
    • The reversible nature of these changes highlights their functional basis.
    • Understanding these ECG findings is vital for accurate patient assessment during hypothermia treatment.