Heart Block EKG - 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 12-21-2011
USMLE Forums Master
 
Steps History: Step 1 Only
Posts: 537
Threads: 80
Thanked 342 Times in 138 Posts
Reputation: 374
EKG Heart Block EKG

As part of a physical exam required by his company’s health insurance provider, A 22-year-old man has an ECG and rhythm strip recorded. The rhythm strip tracing is shown below. Which of the following best describes this patient’s cardiac rhythm?

Heart Block EKG-atb1318f1.jpg
click image to enlarge

A) 2:1 second degree heart block
B) Mobitz 1
C) Mobitz 2
D) First degree heart block
E) Third degree heart block
Reply With Quote Quick reply to this message
The above post was thanked by:
SOBE223 (01-07-2012)



  #2  
Old 12-21-2011
bebix's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,357
Threads: 194
Thanked 3,259 Times in 881 Posts
Reputation: 3269
Default

AV 2G - Mobitz 1
Reply With Quote Quick reply to this message
  #3  
Old 12-21-2011
qurat21's Avatar
USMLE Forums Master
 
Steps History: 1 + CK
Posts: 623
Threads: 62
Thanked 287 Times in 186 Posts
Reputation: 297
Default

mobitz 2...gradual increase in PR interval until P wave not followed by QRS complex.
Reply With Quote Quick reply to this message
  #4  
Old 12-21-2011
bebix's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,357
Threads: 194
Thanked 3,259 Times in 881 Posts
Reputation: 3269
Default

Quote:
Originally Posted by qurat21 View Post
mobitz 2...gradual increase in PR interval until P wave not followed by QRS complex.
gradual increase....yeap, mobitz 1
Reply With Quote Quick reply to this message
  #5  
Old 12-21-2011
tyagee's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,365
Threads: 648
Thanked 584 Times in 354 Posts
Reputation: 594
Default

c

progressively prolonging PR interval followed by absent QRS complex.
Reply With Quote Quick reply to this message
  #6  
Old 12-21-2011
USMLE Forums Master
 
Steps History: Step 1 Only
Posts: 537
Threads: 80
Thanked 342 Times in 138 Posts
Reputation: 374
Default

yes i too thought the same but the answer was given as option A.so shall i consider it is wrong?
Reply With Quote Quick reply to this message
  #7  
Old 12-21-2011
bebix's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,357
Threads: 194
Thanked 3,259 Times in 881 Posts
Reputation: 3269
Default

yeap, this is a classic Mobitz 1!

This is NOT Mobitz 2!!!!

Mobitz I second-degree AV block is characterized by a progressive prolongation of the PR interval. Ultimately, the atrial impulse fails to conduct, a QRS complex is not generated, and there is no ventricular contraction. The PR interval is the shortest in the first beat in the cycle.

Mobitz II second-degree AV block is characterized by an unexpected nonconducted atrial impulse, without prior measurable lengthening of the conduction time. Thus, the PR and R-R intervals between conducted beats are constant.
Reply With Quote Quick reply to this message
The above post was thanked by:
Al-Saoudi (12-21-2011), chienpolska (12-27-2011), chriledi (05-11-2012), drnirajmavani (12-21-2011), jahn77 (12-22-2011), orfie25 (12-22-2011), pass7 (12-21-2011), tyagee (12-21-2011)
  #8  
Old 12-22-2011
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 sonu.agarwall View Post
yes i too thought the same but the answer was given as option A.so shall i consider it is wrong?
ya definitely its wrong. main reason: look at the ekg part after first block. next one is 3:1. so definitely wrong.

its for sure Mobitz type 1
Reply With Quote Quick reply to this message
  #9  
Old 12-23-2011
USMLE Forums Addict
 
Steps History: Not yet
Posts: 192
Threads: 0
Thanked 47 Times in 40 Posts
Reputation: 57
Default

Clearly Mobitz I

there are two groups In the second group 3 p are coducted one does not..

progressive prolongation of the pr interval

wenckbach phenomenon
Reply With Quote Quick reply to this message
  #10  
Old 12-27-2011
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 460
Threads: 278
Thanked 161 Times in 79 Posts
Reputation: 171
Default

b) mobitz type1
Reply With Quote Quick reply to this message
  #11  
Old 01-07-2012
USMLE Forums Addict
 
Steps History: 1 + CS
Posts: 142
Threads: 33
Thanked 97 Times in 28 Posts
Reputation: 107
Smile

Mobitz I for sure.

Count the blocks between P-R. Will gradually increase then suddenly disappear
Reply With Quote Quick reply to this message
  #12  
Old 05-10-2012
USMLE Forums Newbie
 
Steps History: Step 1 Only
Posts: 4
Threads: 1
Thanked 1 Time in 1 Post
Reputation: 11
Correct Answer Mobitz 1

It is a give away Question. I have no doubt that it is Mobitz Type 1 or Wenckebach type of a Block.
Reply With Quote Quick reply to this message



Reply

Tags
Cardiology-, EKGs-, Internal-Medicine-, Step-2-Questions

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
Myocardial infarction plus bradycardia and heart block kemoo USMLE Step 2 CK Forum 0 07-04-2011 03:25 AM
how many experimental Qs do they have per block? Dr_Kal_El USMLE Step 1 Forum 2 07-01-2011 03:45 PM
Management of Heart Block; Pacing or Drugs! docoftheworld USMLE Step 2 CK Forum 2 06-07-2011 01:43 PM
Heart block with myocardial infarction management kemoo USMLE Step 2 CK Forum 8 06-05-2011 10:06 AM
NBME 1 block 4 qn 17 aktorque USMLE Step 1 Forum 9 03-08-2011 12:02 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)