3rd Degree AV Blocks...HELP! - page 2

by MissRnToYou

2,833 Views | 15 Comments

Hi everyone! I am in my last semester of nursing school and we are learning about how to read EKGs. I am confused on how to differentiate 3rd Degree AV Blocks :eek:. This particular EKG reading doesn't appear to have anything... Read More


  1. 0
    How I remember a 3rd degree block: If your P's and QRS' don't agree, you've got yourself a 3rd degree. 3rd degree block is also known as AV-dissociation. The P's are off doing their own thing and the QRS' are off doing their own thing - think of them as "not being married to each other."


    Notice how the PR-interval is all of the place. You may also have P's buried in the QRS or in the T waves (as in this example).

    ...Compared to a Mobitz II (second degree type II) where the PR-interval is consistent but you will have a dropped QRS.
  2. 0
    I like the Hillbilly version
  3. 0
    Quote from grntea
    well, thank you very much, vickyrn!
    personally, i love students (they are our future, after all) and definitely consider the source .

    (does that mean esme and i get cheers
    ?

    rah, rah, r[color=#00ff00]ah!
    ooooo cheers!!!!
  4. 1
    Quote from Esme12
    We should set up an online tutoring or school instead of giving it up for free.....

    Anyhow, It keeps me sane....

    A FAQ would probably be particularly helpful, but that's assuming people would actually read the thing.
    Esme12 likes this.
  5. 0
    P waves will be going at a rate of 60-100 (Sinus)
    QRS will be going at a rate of 40-60 (thats their intrinsic rate)

    if u have P waves going one speed , and QRS going another..most likely its a 3rd Degree Heart block
  6. 0
    This was a very helpful explaination for me. I was having trouble understanding this concept as well. Thank you


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