Hypothermia electrocardiogram: Difference between revisions

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Revision as of 21:49, 23 September 2012

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Osborn waves may appear on the ECG for temperatures less tahn 91.4 degrees Fahrenheit (33 degrees Celsius)

There is a slowing of the sinus rate
Prolongation of the PR interval and the QTc
Prolongation of the QRS is often due to the appearance of the J wave
The most typical finding is the appearance of the Osborne J wave, an extra deflection between the QRS complex and the T wave.
- Consistently found when the temperature falls below 25 degrees Centigrade.
- More prominent in the left precordial leads
- Increases in size with decreasing temperature
- Caused by a current of injury, delayed ventricular depolarization, or early repolarization
About 50 to 60% of these patients develop atrial fibrillation. VF may also occur.

@@ Line 20: / Line 20: @@
 #* Caused by a current of injury, delayed ventricular depolarization, or early repolarization
 # About 50 to 60% of these patients develop [[atrial fibrillation]]. [[VF]] may also occur.
-[[Image:ECG_Hypothermia.jpg|350px|left|Osborne J waves due to hypothermia]]
-[[image:Hypothermia1.jpg|350px|left|frame|Osborn J waves due to hypothermia]]
-<br clear="left"/>
-<div align="left">
-<gallery heights="250" widths="500">
-image:Osborne1.png|An Osborn J wave
-image:Osborn-wave1.gif|Osborn wave.  81-year-old black male with BP 80/62 and temperature 89.5 degrees F (31.94 C)
-image:Osborne ecg1.jpg|A 12 lead ECG of a patient with a body temperature of 32 degrees Celsius. Note the sinus bradycardia, the prolonged QT interval (QTc is not prolonged) and the Osborn J wave, most prominently in leads V2-V5
-Image:JJ0001xx.jpg|An ECG of a patient with a body temperature of 28 degrees Celsius.
-</gallery>
-</div>
 ==References==
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+[[Category:Cardiology]]
+[[Category:Electrophysiology]]
+[[Category:Emergency medicine]]
+[[Category:Intensive care medicine]]
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