Vasopressin Versus Epinephrine in PEA Cardiac Arrest - @ JEMS.com


Vasopressin Versus Epinephrine in PEA Cardiac Arrest

Street Science


 
 

Keith Wesley | | Tuesday, June 26, 2007


Review of: Little CM, Marietta MH, Peng K, et al: "Vasopressin alone or with epinephrine may be superior to epinephrine in a clinically relevant porcine model of pulseless electrical activity cardiac arrest." American Journal of Emergency Medicine. 24(7):810-814, 2006.

The Science

This study examines the effect of vasopressin alone, epinephrine alone and the combination of vasopressin and epinephrine on several clinical parameters of pigs with PEA following cardiac arrest.

The primary outcome variable was coronary artery perfusion pressure and atrial filling pressures. Survival was not measured because of the limited number of pigs they had to work with.

The combination of the two drugs resulted in significantly higher coronary artery pressures, which is postulated to result in improved coronary perfusion and subsequently higher cardiac arrest survival. Interestingly, those patients that failed to respond to epinephrine alone had a significant response to the subsequent administration of vasopressin.

The Street

The 2005 guidelines further extended the role of vasopressin by including it in the treatment of asystole in place of epinephrine. It had been placed in the V-fib/V-tach algorithm in the 2005 guidelines. The idea was that the two agents were interchangeable.

However, further research indicates that the clinical effects of epinephrine and vasopressin differ in how they work by stimulating different receptors in the vasculature. European studies have shown that vasopressin significantly increases coronary artery pressure and therefore might improve the outcomes in cardiac arrest. No one had looked at using vasopressin as a pressor agent in the context of pulse-less electrical activity (PEA).

One of the postulated advantages of vasopressin over epinephrine is that epinephrine increases myocardial oxygen consumption and therefore would lead to worsening cardiac function. Vasopressin appears to exert more of an effect on the vasculature, resulting in higher aortic and coronary artery pressures. I suspect that this and similar research may lead to changes in the PEA algorithm.




Connect: Have a thought or feedback about this? Add your comment now
Related Topics: Cardiac and Circulation, Medical Emergencies, Research

What's Your Take? Comment Now ...

Buyer's Guide Featured Companies

Featured Careers & Jobs in EMS

Get JEMS in Your Inbox

 

Fire EMS Blogs


Blogger Browser

Today's Featured Posts

 

EMS Airway Clinic

Improving Survival from Cardiac Arrest Using ACD-CPR + ITD

Using active compression-decompression CPR with an ITD has been shown to improve 1-year survival from cardiac arrest by 33%.
More >

Multimedia Thumb

Philadelphia Fire Department Apologizes for Medic’s Jab at Police

Union head calls photos a slap in the face of officers.
Watch It >


Multimedia Thumb

D.C. Fire and EMS Crews Blame New Technology for Patient’s Death

Delayed response blamed on recurring dispatch problems.
Watch It >


Multimedia Thumb

Suspect Steals, Crashes Maryland Ambulance

One killed, others injured in Prince George’s County crash.
Watch It >


Multimedia Thumb

Tennessee Trench Rescue

Worker pulled from Roane County worksite.
More >


Multimedia Thumb

Time’s Ebola Firefighters

Doctors, nurses and others saluted for fighting virus.
More >


Multimedia Thumb

Car Strikes Manhattan Pedestrians

Seven people hurt when car jumps curb.
More >


Multimedia Thumb

Braun Ambulances' EZ Door Forward

Helps to create a safer ambulance module.
Watch It >


Multimedia Thumb

VividTrac offered by Vivid Medical - EMS Today 2013

VividTrac, affordable high performance video intubation device.
Watch It >


Multimedia Thumb

The AmbuBus®, Bus Stretcher Conversion Kit - EMS Today 2013

AmbuBus®, Bus Stretcher all-hazards preparedness & response tool
Watch It >


More Product Videos >