Dog Site - Dog Stuff
Dog Forum | Dog Pictures

Go Back   Chazhound Dog Forum > Dog Forum News > The Fire Hydrant

Thread Tools Display Modes
Old 02-17-2013, 01:18 PM
Maxy24's Avatar
Maxy24 Maxy24 is offline
Top Dog
Join Date: Nov 2006
Location: Massachusetts
Posts: 8,040
Default School help-preload and afterload

I'm working on a case study for AP&P and am having trouble figuring something out. The case study involves a guy who had a heart attack that resulted in damage to the left ventricle wall. His blood pressure us 105/80 and he is suffering from pulmonary edema. The question I am answering is this:
"Which term more accurately describes the stress placed on Eds heart increased preload or increased afterload explain?"

So I'm thinking he has increased preload because his left ventricle cannot eject all of its blood volume, causing it to overfill and backup (which is why he has pulmonary edema). The increased blood volume in the left ventricle means an increase in pressure and thus in preload.

But I'm not entirely certain how afterload is affected. I thought maybe afterload would increase because the heart would try pumping with more force in an attempt to eject more blood, but I don't know if that's what an increase in afterload is exactly (we have not learned about preload or afterload before, so this is just what I've gathered from googling). Or would afterload just stay normal because there is not an increase in blood pressure?

Can anyone help clarify what would happen to afterload in this case (and why)?

Thank you ~Dixie's Mom~ for my awesome siggy!
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 09:57 PM.

1997-2013 Chazhound Dog Site