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Re: Re: What if the story was wrong?


Outer Bamnks diving on the Great Escape Southern California Live-Aboard Dive Boat


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Posted by Robert on February 26, 2008 at 05:42:01:

In Reply to: Re: What if the story was wrong? posted by SoBay Jim on February 25, 2008 at 23:12:22:

AEDs are programed to shock two types of rhythms. They are called Ventricular Tachycardia, and Ventricular Fibrulation. Most AEDs that are sold, do not have a monitor feature, so a "layperson" will not be able to tell if there is a rhythm or not. If a heart beat is extremly weak, then the machine may not be able to detect anything, so it treats is as asystole, or what is commonly known as "flat line". Flat line is a NON-Shockable rhythm.

AEDs have to work with variences from patient to patient. One of them being chest impedence, or the overall mass and make-up of the chest anatomy. A patient that is obese has a greater potential for a no shock that someone who is athletic. Also, the machine must be able to tell the difference between actual heart rhythms and external causes (i.e. Road vibrations or turbulance) In fact, Basic Level EMTs and First Responders are taught ot pull the ambulance over, before performing an analysis of a patient. The vibration of the road can falsly indicate a shockable rhythm.

I hope this helps!



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