NBME-2-4-21

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NBME-2-4-21

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ts97
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Topics: 13
Posts: 128

08/09/07 - 06:30 PM

What is this?

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cirus
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08/09/07 - 07:36 PM

The pt has Renal Artery Stenosis (MC cause in this age group)

the stenotic renal artery will lead t decreased bl to the kiney, activating Renin Angiot system---> hypertention & hypokalemia but no hypernatremia (secondry Hyperaldosteronism)

robin082006
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08/09/07 - 08:18 PM

D

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Step2300
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Topics: 2
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08/09/07 - 09:57 PM

Why wouldn't secondary hyperaldosteronism cause hypernatremia since it will cause increased reabsorption of sodium via the increased aldosterone?

radonc
Forum Senior

Topics: 6
Posts: 174

08/10/07 - 01:41 AM

I think this is hyperaldosteronism. My answer is A.

Low K+, HTN in a young patient. The reason why this is NOT renal artery stenosis is because MRA abdo is normal.

Aashi
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08/10/07 - 09:22 AM

A

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cirus
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08/10/07 - 10:09 AM

radonc wrote:
I think this is hyperaldosteronism. My answer is A.

Low K+, HTN in a young patient. The reason why this is NOT renal artery stenosis is because MRA abdo is normal.

In this case there would have been HYPERNATREMIA, & since Na is normal, ill stick to RAS causing 2ry hyperaldosteronism..

tamerbashir
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12/13/07 - 11:59 AM

fongch
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12/14/07 - 06:03 PM

I also choose A - normal MRA should rule out renal artery stenosis.

drfax
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Topics: 21
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12/16/07 - 06:07 AM

#10

A
Hypernatremia is not essentially present in hyperaldastronism because of "escape phenomenon"

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