mdwannabe
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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
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| Idiopathic
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| Idiopathic
Forum Guru
Topics: 19
Posts: 641
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I have to say A...I cant come up with any reason other than relative strength of contraction.
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| mdwannabe
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nope .. contractions are same...better yet ECG never is the evidence of mechanical activity.
Try again.
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"Life not lived for others, is not worth living" Uncle Einstein
"A life is not important, except in the impact it has on other lives" -Jackie Robinson
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| mdwannabe
Forum Guru
Topics: 37
Posts: 1,133
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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.
___________________
"Life not lived for others, is not worth living" Uncle Einstein
"A life is not important, except in the impact it has on other lives" -Jackie Robinson
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