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mdwannabe
Forum Guru Topics: 37 Posts: 1131 |
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
| Forum Guru Topics: 19 Posts: 639
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Idiopathic
| Forum Guru Topics: 19 Posts: 639
I have to say A...I cant come up with any reason other than relative strength of contraction.
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mdwannabe
| Forum Guru Topics: 37 Posts: 1131
nope .. contractions are same...better yet ECG never is the evidence of mechanical activity. Try again.
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mdwannabe
| Forum Guru Topics: 37 Posts: 1131
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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