Osborn or J-waves on ECG are associated with which condition?

Osborn or J-waves on ECG are associated with which condition?

• A. Hypothermia
• B. Hyperkalemia
• C. Myocardial infarction
• D. Hypoxia

Answer: (A)

Osborn waves, also known as J waves, are a classic ECG finding in hypothermia. They appear as an extra deflection at the junction between the end of the QRS complex and the beginning of the ST segment, best seen in precordial leads. The colder the body, the more prominent these waves tend to be, and they can disappear with rewarming. This is why hypothermia is the best answer: Osborn waves are strongly associated with low body temperature due to temperature-related changes in ventricular repolarization, particularly in the epicardial layers, which creates a voltage gradient that shows up as the J wave on the ECG. The other conditions mentioned—hyperkalemia, myocardial infarction, and hypoxia—have characteristic ECG changes (peaked T waves and widened QRS in hyperkalemia; ST elevations and possible Q waves in infarction; ST or diffuse changes with hypoxia) that do not produce the Osborn wave pattern.

Osborn waves, also known as J waves, are a classic ECG finding in hypothermia. They appear as an extra deflection at the junction between the end of the QRS complex and the beginning of the ST segment, best seen in precordial leads. The colder the body, the more prominent these waves tend to be, and they can disappear with rewarming.

This is why hypothermia is the best answer: Osborn waves are strongly associated with low body temperature due to temperature-related changes in ventricular repolarization, particularly in the epicardial layers, which creates a voltage gradient that shows up as the J wave on the ECG. The other conditions mentioned—hyperkalemia, myocardial infarction, and hypoxia—have characteristic ECG changes (peaked T waves and widened QRS in hyperkalemia; ST elevations and possible Q waves in infarction; ST or diffuse changes with hypoxia) that do not produce the Osborn wave pattern.