A 60 year old woman is brought into your resus room VSA with CPR in progress. The paramedics tell you that she had a witnessed arrest and bystander CPR was performed for 4 minutes before they arrived on scene. They found her in PEA, took over CPR, started an IV, and rapidly transported as they were only 5 minutes out...
Rapid airway control. (Does not need to be intubation; my go to is an LMA initially).
Confirm rhythm is non-shockable.
Place one nurse in charge of managing the basic ACLS protocol: watching compressions, monitoring the time and pulse checks, and giving epinephrine (if you think that is a good idea).
Look at the monitor: is the QRS wide or narrow? (Get a 12 lead ECG if possible)IF NARROW COMPLEX: Diagnose
- The cause is generally mechanical
- The primary DDx is tamponade, tension pneumothorax, PE, and hyperinflation
- Perform a rapid history and physical looking for clues with respect to the above DDx: JVD, muffled heart sounds, tracheal deviation, cancer history, apparent DVT
- Narrow the DDX using ultrasound
- The LV should be hyperdynamic, as this is obstruction or pseudo PEA
- Fluids wide open for all
- If tamponade → pericardiocentesis
- If pneumothorax → finger thoracostomy
- If PE → thrombolytics (alteplase 0.6mg/kg over 2 min)
- If hyperinflation → disconnect from the vent and adjust the settings
- The cause is generally metabolic, toxicologic, or MI (although it could be one of the above obstructive causes with RBBB/LBBB/aberency)
- The primary DDx is hyper K+, Na+ channel blockers, or MI. (MI has a dismal outcome in PEA.)
- Perform a rapid history and physical looking for clues with respect to the above DDx: critically ill, sepsis, dialysis fistula?
- Narrow the DDX using ultrasound
- The heart is generally hypokinetic or akinetic, ie. true PEA; if hyperdynamic, think about mechanical cause with RBBB/LBBB/aberrancy
- Empirically treat with calcium chloride and sodium bicarb
Remember, if it was wide complex the cause could still be mechanical. If there is no response to therapy, go through the narrow complex steps
Did you miss a clinically obvious hypothermia?
Before calling the code, are you sure there is no pulse? Your fatty fingers may not be as good as an ultrasound with doppler.
This post is really just a reproduction and elaboration of the excellent article by Littmann, Bustin and Haley below. My standard format includes a much wider review of the topic, but this paper is just so great, both for teaching and for organizing yourself in a code, it deserves its own post.
I was pretty vague on the "narrow the DDX using ultrasound" statement. I think this approach to PEA is excellent even if you don't have the requisite ultrasound skills to diagnose PE or pneumothorax. However, if you don't have those skills you are probably better off not spending any more time here, but instead checking out ultrasoundpodcast.com, or sinaiem.us, or the CastleFest lectures, or the many other excellent FOAM ultrasound resources out there.
Other FOAMed Resources
Ultrasound for pneumothorax: http://sinaiem.us/tutorials/pneumothorax
ReferencesLittmann L, Bustin DJ, and Haley MW. "A simplified and structured teaching tool for th\ne evaluation and management of pulseless electrical activity." Medical Principles and Practice 23.1 (2013): 1-6.
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