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 Cardio  



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Author5 Posts
  #1

Comparing normal 17 year old man with normal 45 year old woman, the greatest and sustained difference at rest in the ECG traicing will be:

a. Hight of R
b. Depth of S
c. variable P-R interval from beat to beat
d. variable Q-Q interval from beat to beat
e. ST elevation




  #2

edit


  #3

I have to say A...I cant come up with any reason other than relative strength of contraction.


  #4

nope .. contractions are same...better yet ECG never is the evidence of mechanical activity.
Try again.


  #5

well... the answer is D. This is Sinus Arrythmia, which is normal in the young and abnormal in older individual.
Height of R and depth of S are related to mass of the muscle and the conductivity through the tissue.
Varuable P-R is evidence of 2nd degree Heart Block type II,
ST elevation - myocardial injury or inflamation.





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