Ventricular Septal Rupture; Step Up in O2 Sat! - 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 2 CK Forum

USMLE Step 2 CK Forum USMLE Step 2 CK Discussion Forum: Let's talk about anything related to USMLE Step 2 CK exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-29-2013
USMLE Forums Scout
 
Steps History: ---
Posts: 15
Threads: 7
Thanked 2 Times in 2 Posts
Reputation: 12
Heart Ventricular Septal Rupture; Step Up in O2 Sat!

This is from MTB 2 , ventricular septal rupture

You can't always depend on buzzwords like "step-up" for oxygenation. Often, the numbers are simply presented to you: "42% oxygen saturation is found on a sample of blood from the right atrium. 85% saturation is found on the right ventricular sample.

Look for a step-up In oxygen saturation as you go from the right atrium to the right ventricle to hand you the diagnosis of septal rupture.
Reply With Quote Quick reply to this message



  #2  
Old 09-29-2013
USMLE Forums Addict
 
Steps History: 1+CK+CS
Posts: 118
Threads: 10
Thanked 95 Times in 44 Posts
Reputation: 105
Default

Ok this is the concept: For example patient has ventricular septal rupture after MI. So generally blood will go from left ventricle to right ventricle. Right heart contains venous blood, so it O2 saturation will be low. Left heart contains arterial blood with high O2. Left to right shift will lead for arterial blood entering right ventricle, which will lead to "step up" of O2 saturation.
Hope that helps.
Reply With Quote Quick reply to this message
The above post was thanked by:
maas (09-29-2013)
  #3  
Old 09-29-2013
USMLE Forums Scout
 
Steps History: ---
Posts: 15
Threads: 7
Thanked 2 Times in 2 Posts
Reputation: 12
Default

Quote:
Originally Posted by Gikson View Post
Ok this is the concept: For example patient has ventricular septal rupture after MI. So generally blood will go from left ventricle to right ventricle. Right heart contains venous blood, so it O2 saturation will be low. Left heart contains arterial blood with high O2. Left to right shift will lead for arterial blood entering right ventricle, which will lead to "step up" of O2 saturation.
Hope that helps.

thank you for your response , I get most of the idea but didnt for
"step up" of O2 saturation.
what it mean , i,e how it can be helpful clinically m how to interpretate it clinically , you mean that the o2 saturation will differ widely on each different sample ??

Best regards
Reply With Quote Quick reply to this message
 
  #4  
Old 09-29-2013
USMLE Forums Addict
 
Steps History: 1+CK+CS
Posts: 118
Threads: 10
Thanked 95 Times in 44 Posts
Reputation: 105
Default

Quote:
Originally Posted by maas View Post
thank you for your response , I get most of the idea but didnt for
"step up" of O2 saturation.
what it mean , i,e how it can be helpful clinically m how to interpretate it clinically , you mean that the o2 saturation will differ widely on each different sample ??

Best regards
I can't be sure, but i think that it can be used in question stem. They can describe patient with ventricular septal rupture and ask for blood oxygen changes....
Reply With Quote Quick reply to this message
The above post was thanked by:
maas (09-30-2013)



Reply

Tags
Cardiology-

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
abruptio or rupture ? and why ? tyagee USMLE Step 2 CK Forum 7 09-26-2012 03:54 AM
Died by aortic rupture! Evergreen USMLE Step 1 Forum 7 11-02-2011 06:28 PM
diaphragmatic rupture busterbee USMLE Step 2 CK Forum 6 08-16-2011 07:49 AM
Atrial Septal Defect, does it close or not? cerebrum85 USMLE Step 1 Forum 3 03-08-2011 11:08 PM
Ventricular Septal Defect Association Mnemonic corpus callosum USMLE Step 2 CK Mnemonics 0 05-17-2010 02:54 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)