asterixis
Forum Senior
Topics: 11
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The largest proportional increase in the left ventricular afterload and myocardial oxygen consumption is most likely to occur following a 20% increase in which of the following?
a. aortic pressure
b. coronary blood flow
c. heart rate
d. right atrial pressure
e. stroke volume
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| Bartek
Forum Senior
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Why not A?
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| robin082006
Forum Hero
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Can increase in aortic pressure cause increase in cardial O2 consumption?
I go with E
increase stroke volume--->increase in contraction--> increase O2 consumption
increase stroke volume---> increase CO-->increase left ventricular afterload
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| asterixis
Forum Senior
Topics: 11
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I think the answer is a. In the physiology BRS it says that myocardial oxygen consumption is determined by the amount of tension developed by the heart. It increases when there are increases in aortic pressure (increase afterload), increased heart rate or stroke volume or when the size of the heart is increased. What do you guys think?
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| yasmeen
Forum Guru
Topics: 67
Posts: 936
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A
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| r_albayunen
Forum Senior
Topics: 0
Posts: 218
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A
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| krsna
Forum Senior
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Posts: 211
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A
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