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Old 10-21-2012
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Question Can anyone explain these features of shock

Hey fellas, have a small doubt regarding shock.. Can anyone explain as to why there is an increase in pulmonary capillary wedge pressure or central venous pressure in case of cardiogenic shock and decrease in septic or anaphylactic shock.
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Old 10-21-2012
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Because in cardiogenic shock the heart is unable to pump blood forward, so it builds up and adds up to the blood that is coming from the SVC and IVC, which increase the pressure. The other two types of shock you mentioned are grouped together in the category of distributive shock, which are cracterized by a paroxystical "increase" in the cardiac outut, here the heart is pumping way to much blood forward, so there is less LVESP and LVEDP PCWP.

Grab a good physiology book and try to understand by yourself, i just gave you the general idea
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Old 10-23-2012
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Thanks, but I guess if I could, I would..
Needed a fast reply that's why the question..I often find that digging for stuff tasks longer time than intended. Since I'm running out of time..I wanted to know the answer fast..Thanks anyway

Sent from my GT-I9300 using Tapatalk 2
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My apologies if I sounded like a douche

Take a look at this article, it would make things clear and is not that long.

http://www.cicm.org.au/journal/2000/march/Shock%201.pdf

Explains the Pathophysiology of all types of shock and their management (which will be asked in the step)
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Old 10-23-2012
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PCWP = left atrial pressure.

In cardiogenic shock, pulmonary edema, there is LV failure - pressure increases back in the left atrium and pulmonary circulation = increased PCWP > 18

In septic, neurogenic, anaphylactic, hypovolemic, and ARDS , PCWP < 18

Spetic shock has a distinction from other shocks, that is normal MVO2 concentarion (15.5), while it is low in anaphylactic, neurogenic, etc.
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