What effect does hypothermia have on an EKG?

Hypothermia has a distinctive impact on the electrocardiogram (EKG) due to the physiological changes that occur at lower body temperatures. One of the hallmark features of EKG changes seen in hypothermia is the presence of a J wave, also referred to as the Osborn wave. This wave typically appears as a notching or a positive deflection at the end of the QRS complex, indicating that the heart's electrical activity is altered due to the lower temperature.

In addition to the Osborn wave, bradycardia—an exceptionally slow heart rate—is common in hypothermic patients. As the body temperature decreases, the metabolic rate slows down, which directly influences heart rate. The combination of J waves and bradycardia is significant in the context of hypothermia, helping healthcare providers recognize and respond to the condition effectively.

Understanding these effects aids in diagnosing and managing patients experiencing hypothermia, allowing for appropriate treatment measures to restore normal body temperature and heart function.