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Kaplan Qbank USMLE



Author7 Posts
  #1

Which of the following changes in the ventricles can be due to the effects of Epinephrine?

A. inc dp/dt during isovolumetric contraction
B. inc peak intraventricular pressure
C. inc rate of relaxation of the myocardium
D. inc rate of firing of the purkinje fibres


  #2

is it B


  #3

it's a - inc. contractility

___________________
life is guud

  #4

thats what i thought,

epinephrine increases contractility, but is it not during the ejection phase, or does it increase the contractility during all the phases like thisthis one as the isovolumetric contraction

please clear my doubt ????


  #5

ALL ans is correct

  #6

are correct

  #7

i go wiyh A now


Edited by skyhigh on 03/16/06 - 10:05 AM







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