Exercise and Cardiac Output! - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 06-24-2011
USMLE Forums Guru
 
Steps History: 1 + CS
Posts: 438
Threads: 111
Thanked 233 Times in 133 Posts
Reputation: 243
Question Exercise and Cardiac Output!

Guys, FA 2010 says that during exercise, initially the CO increases due to an increase in SV and then after prolonged exercise due to an increase in HR.

FA 2011 says that initially increases due to an increase in HR

Kaplan 2010 lecture notes says that initially during exercise CO increases due to increase in HR and then after prolonged exercise CO increases due to an increase in SV.

WHO'S RIGHT??????

I will go with kaplan. I'm I correct??????
Reply With Quote Quick reply to this message



  #2  
Old 06-24-2011
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,175
Threads: 38
Thanked 854 Times in 478 Posts
Reputation: 864
Default

I agree with this:

Quote:
Kaplan 2010 lecture notes says that initially during exercise CO increases due to increase in HR and then after prolonged exercise CO increases due to an increase in SV.
I think you can think of it practically: What happens when you quickly run up the flight of stairs? Your heart will be pounding (increase HR)

What happens if you continuously keep running up... after a while, your HR should slow down a bit, this is due to SV being increased due to increased contractibility.
Reply With Quote Quick reply to this message
The above post was thanked by:
bebix (06-24-2011), evavar (06-25-2011), leo lakhani (06-24-2011), tootsie (06-30-2011)
  #3  
Old 06-24-2011
Dr_Laura's Avatar
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 499
Threads: 85
Thanked 529 Times in 222 Posts
Reputation: 539
Default

That correction was in the errata list for FA 2010... Initially there's an increase due to the increase in HR. The errata list is pretty big so you should go through it. Here's a link

http://firstaidteam.com/wp-content/u...ta-1009291.pdf
__________________
YouTube:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Facebook:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Reply With Quote Quick reply to this message
The above post was thanked by:
evavar (06-25-2011), tootsie (06-30-2011)



Reply

Tags
Cardiovascular-, Physiology-

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cardiac Output - Venous Return Curves Sabio USMLE Step 1 Bits & Pieces 20 09-02-2013 12:37 AM
Cardiac Output and TPR relationship? prim USMLE Step 1 Forum 4 08-24-2012 07:26 PM
Why increased cardiac output in anemia! step1addict USMLE Step 1 Bits & Pieces 6 08-24-2012 06:37 PM
Well maintained Cardiac Output in Elderly Men kemoo USMLE Step 1 Forum 6 11-23-2011 09:03 AM
Cardiac output (dyne/sec) kemoo USMLE Step 2 CK Forum 8 04-21-2011 09:45 PM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)