VSD and Narrow S2! - 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 12-10-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 460
Threads: 278
Thanked 161 Times in 79 Posts
Reputation: 171
Heart VSD and Narrow S2!

Hi all:

I would like to ask a question that is probably too easy for a lot of people here. My question is: In VSD, why there is a narrow S2 with an increased P2?

Thank you for your help!
Reply With Quote Quick reply to this message



  #2  
Old 12-10-2011
USMLE Forums Addict
 
Steps History: Not yet
Posts: 129
Threads: 18
Thanked 185 Times in 62 Posts
Reputation: 195
Default

Think about the left-to-right shunt, more blood is flowing to right ventricle through the VSD hence the narrow splitting of s2 and loud p2 due to delayed closure of the pulmonary valve.
Reply With Quote Quick reply to this message
The above post was thanked by:
chienpolska (12-11-2011)
  #3  
Old 12-13-2011
Adamentium's Avatar
USMLE Forums Scout
 
Steps History: 1+CK+CS+3
Posts: 64
Threads: 12
Thanked 94 Times in 20 Posts
Reputation: 104
Default Wide S2 and Loud P2

Quote:
Originally Posted by chienpolska View Post
Hi all:

I would like to ask a question that is probably too easy for a lot of people here. My question is: In VSD, why there is a narrow S2 with an increased P2?

Thank you for your help!
Hey VSD should widen the A2 P2 gap as much of the blood goes to Rt ventricle which delays closure of P valve. So it should be a wide S2 and not narrow. Correct me if I am wrong.

Loud P2 is due to Blood flowing from High Pressure zone (hypertrophied RV in VSD) to low pressure Pul System. Intensity of sound depends upon Pressures across the valve.
Reply With Quote Quick reply to this message
The above post was thanked by:
chienpolska (12-14-2011), pass7 (12-14-2011), sam88 (12-13-2011)
  #4  
Old 12-13-2011
USMLE Forums Addict
 
Steps History: Not yet
Posts: 129
Threads: 18
Thanked 185 Times in 62 Posts
Reputation: 195
Default

initially you will have a wide splitting of s2 but later as pulmonary hypertension develops due to the Left-to-right shunt a a narrow splitting of S2 will develop.
this as far as i know.. correct me if i'm wrong.
Reply With Quote Quick reply to this message
The above post was thanked by:
chienpolska (12-14-2011)
  #5  
Old 12-14-2011
Adamentium's Avatar
USMLE Forums Scout
 
Steps History: 1+CK+CS+3
Posts: 64
Threads: 12
Thanked 94 Times in 20 Posts
Reputation: 104
Default

Quote:
Originally Posted by sam88 View Post
initially you will have a wide splitting of s2 but later as pulmonary hypertension develops due to the Left-to-right shunt a a narrow splitting of S2 will develop.
this as far as i know.. correct me if i'm wrong.
You are Right sam, later with development Pul HTN splitting should narrow and at the same time we should be worrying about R to Left shunt ( Eisermenger's Complex ) and cyanosis. lol!!
Reply With Quote Quick reply to this message
  #6  
Old 12-14-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 460
Threads: 278
Thanked 161 Times in 79 Posts
Reputation: 171
Default

Thank you guys : ) very helpful information!!
Reply With Quote Quick reply to this message



Reply

Tags
Cardiology-, 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
The concept of wide versus narrow Pulse Pressure Ace3 USMLE Step 1 Forum 20 07-30-2011 06:57 PM
Wide PP vs Narrow PP drzamzam USMLE Step 1 Forum 0 07-30-2011 10:12 AM

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)