Pulseless electrical activity electrocardiogram
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Electrocardiogram
The appearance of the electrocardiogram in the setting of PEA varies, but several common patterns exist. There may be a normal sinus rhythm or sinus tachycardia, with discernible P waves and QRS complexes. Sometimes there is a bradycardia, with or without P waves, and often there is a wide QRS complex.[1] The presence of a QRS interval > 0.20 seconds is associated with a poorer prognosis. The EKG should be carefully evaluated for signs of:
- Hyperkalemia (peaked T waves, complete heart block, a ventricular escape rhythm)
- ST segment elevation MI should be ruled out
- Osborne waves suggest hypothermia
- QRS interval prolongation suggests tricyclic antidepressant overdose
References
- ↑ Foster B, Twelve Lead Electrocardiography, 2nd edition, 2007