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* nbme2..
 #140985  
  cd45 - 11/24/06 12:41
 
  COULD SOMEONE EXPLAIN THIS....


A 72-year-old woman comes to the physician because of an episode of acute substernal chest pain that occurred while she was rushing to catch a bus. She has basilar crackles at both lung bases. S1 is normal and S2 is decreased. A grade 3/6 systolic murmur is heard best at the upper right sternal border and radiates to the neck. The following data obtained during cardiac catheterization were taken before and during exercise:
Left ventricular volume Aortic P End diastolic End systolic Heart rate
(mm Hg) (mL) (mL) (/min)
Control 130/70 140 50 85
Exercise 160/80 165 58 120
While exercising, the patient has shortness of breath but no chest pain. Which of the following is the most likely cause of the shortness of breath?
A) Decreased cardiac output during exercise
B) Decreased pulmonary blood flow
C) Increased aortic pressure
D) Increased end-diastolic pressure of the left ventricle during exercise
E) Tachycardia

i think it shd be A

as inc in SV is v small...
 
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* Re:nbme2..
#570061
  pashna23 - 11/24/06 12:52
 
  either a or d... A cause end diastolic vol is really high... so looks like an AR... but more the diastolic pressure more the output by starlings forces... hmm  
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* Re:nbme2..
#570072
  cd45 - 11/24/06 13:04
 
  hmm u still havent left.....??
anyways please think abt this q and lemmee know
 
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* Re:nbme2..
#570121
  kashmala - 11/24/06 14:03
 
  D?
decreased compliance
 
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* Re:nbme2..
#570163
  saan - 11/24/06 14:52
 
  i think A.

AS....sys murmur.....radiaton to neck
dec dec CO....dyspnea
 
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* Re:nbme2..
#570176
  luckyalways - 11/24/06 15:12
 
  D..
SAME TYPE QUESTION WITH EXPLANATION IN UW..
 
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* Re:nbme2..
#570459
  cd45 - 11/24/06 21:09
 
  hmm luckyalways then could u explain it to me.. thanks....  
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