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6 Posts

leen
Forum Guru

Topics: 79
Posts: 294

06/28/06 - 03:33 PM

A 72 years old woman came to physician due to 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 nomal and S2 is decreased.A grade 3/6 systolic murmer is heared best at the upper right sternal border and radiates to the neck.the following data obtained during cardic catheterization were taken before and during excercise:
aortic pressure EDV ESV HR
control 130/70 140 50 85
excercise 160/80 165 58 120
while excersicing the woman developed shortness of breath but no chest pain.Which of the following is the most likly cause of shortness of breath?
A decrease cardiac output during excercise
B decrease the pulmonary blood flow
C increase aortic pressure
D increased end- diastolic pressure of LV during exercise
E tachycardia

robin082006
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06/28/06 - 04:13 PM

This question has been discussed

The patient has aortic stenosis

Answer that people agreed is A

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vamsi2004
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Topics: 7
Posts: 144

08/06/06 - 10:37 AM

robin during exercise, both SV (EDV-ESV) and HR are increased,, and CO = SV X HR.

so how can we say that CO is decrease during exercise

alpha12
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Topics: 6
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08/27/06 - 04:54 PM

CO is increased during initial exercise; but if HR is too high, diastolic filling is incomplete and CO decreases. It's in First Aid

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blueocean
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09/03/06 - 06:04 PM

D- if the EDV will increase and ESV will increase but not like EDV , the EDP will be higher which means more pressure in atrium and more presure in pulmonary circulation.

docsrinu
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Topics: 26
Posts: 213

09/03/06 - 06:06 PM

this q has been discussed and the docs finally said ans is E. i am unable to find the link.

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