Osborn wave

Osborn wave (also known as J wave) is a deflection in the ECG tracing that is associated with hypothermia and hypercalcemia. It was first described by the American physician John Jay Osborn in 1953.

History

The Osborn wave was first described by John Jay Osborn in 1953. He observed this wave in a patient who was suffering from hypothermia. Since then, the wave has been studied extensively and is now recognized as a significant indicator of several medical conditions.

Characteristics

The Osborn wave is a positive deflection at the J point (junction between the end of the QRS complex and the beginning of the ST segment) in the ECG. It is usually seen in leads V4-V6, II, III, and aVF. The wave is best seen in the precordial leads and is characterized by a dome or hump shape with a symmetrical ascending and descending limb.

Clinical significance

The presence of an Osborn wave is a significant indicator of hypothermia. It is also associated with hypercalcemia, brain injury, and certain types of cardiac arrhythmias. The wave is not specific for hypothermia and can be seen in normothermic patients as well. It is also seen in patients with acidosis and high blood levels of catecholamines.

Treatment

The treatment of patients with an Osborn wave depends on the underlying cause. In cases of hypothermia, the patient is warmed gradually to restore normal body temperature. In cases of hypercalcemia, treatment involves lowering the calcium level in the blood.

See also

• Electrocardiography
• Hypothermia
• Hypercalcemia
• Cardiac arrhythmia