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Kaplan Qbank USMLE



Author9 Posts
  #1

A pt who has mild fasing hypoglycemia and enlarged heart. What's the defect?

  #2

Could it be steroid use (diabetogenic and stimulate hypertrophy of heart muscle)????

Thanks!

  #3

but steroids cause Hyperglycemia not Hypo!!! that`s why body in the long starvation releases Cortisol.
how about "Chronic Alchoholism" with Chron.Panc.+Fatty heart ??

___________________
Allah (God) is watching over us...

  #4

pompes ds(def of 1,4 glucosidase)

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I hear and I forget. I see and I remember. I do and I understand.
--Confucius

  #5

pompe's dis. due to lysosoal enzyme alpha 1,4-glucosidase deficiency. glycogen stored in liver and striated muscles, cardiomegaly is significant and leads to death.

  #6

Another clue that'll you'll always see with Pompe's is that the pt. is an infant b/c kids with Pompe's usually don't survive pat their 2nd year... sad

  #7

I agree with Pompe's disease

  #8

I don't think there is any hypoglycemia involved in Pompe's disease. Why would a lysosomal alpha glucosidase cause hypoglycemia. The only three glycogen storage diseases in which there is hypoglycemia involved are Von Gierke, Hers, and Cori. If there is hypoglycemia in a glycogen storage disease, shouldn't there be deficency of an enzyme involved in the glycogenolysis or gluconeogenesis in the Liver?

  #9

maybe hyperosmolar nonketotic coma can present with hypoglycemia and cardiomegaly in severely dehydrated pt.

For sure there is no hypoglycemia in Pompe's dis. the alpha-1,3-glucosidase is a lalysosomal enz and is not part of normal glycogen synthase and phosphorylase cycle. Glycogen accumulates in lysosomal vacuoles, potentially causing problems in many tissues. Cardiomegaly is most life-threatening.
AR dis that requires inheritance of 2 defective copies of gene encoding acid alpha glucosidase (GAA) which is on band 17q23.

http://www.emedicine.com/PED/topic1866.htm







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