Flow Volume Curve Question - 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 10-24-2012
MedicalExaminer's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 824
Threads: 66
Thanked 465 Times in 298 Posts
Reputation: 475
Question Flow Volume Curve Question

A 73-year-old man who has atrial fibrillation has been treated pharmacologically for 10 years. He presents to his primary care physician complaining of generalized dyspnea. Pulmonary function tests show forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) are both less than 70% of the predicted value, with a ratio of FEV1 to FVC of 81%. The flow-volume curve is shown in the image. Which of the following is a possible etiology of this presentation?

A Adult-onset asthma
B Amiodarone
C Diltiazem
D Sotalol
E Tobacco
Attached Thumbnails
Flow Volume Curve Question-imageuploadedbytapatalk1351140556.810471.jpg  
__________________
Everything is possible for him who believes (MARK 9:23)
245/247/passed on 1st attempt/223/2mos Obsie /3 US LORS/visa not needed/2008 grad
Reply With Quote Quick reply to this message
The above post was thanked by:
nooranimm (10-25-2012)



  #2  
Old 10-24-2012
blade's Avatar
USMLE Forums Guru
 
Steps History: 1+CK+CS+3
Posts: 358
Threads: 22
Thanked 204 Times in 116 Posts
Reputation: 214
Default BB

BB..pulmonary fibrosis
__________________
with God,nothing is impossible...PREMATCHED!!!
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
  #3  
Old 10-24-2012
USMLE Forums Addict
 
Steps History: Not yet
Posts: 126
Threads: 6
Thanked 43 Times in 22 Posts
Reputation: 53
Default my answer B

FEV1 to FVC of 81% indicate restrictive lung disease + atrial fibrillation treated ten years (fibrosis due amiodarona)
Reply With Quote Quick reply to this message
 
  #4  
Old 10-24-2012
USMLE Forums Master
 
Steps History: 1+CK+CS
Posts: 1,039
Threads: 189
Thanked 570 Times in 323 Posts
Reputation: 580
Default my answer :)

B Amiodarone
Reply With Quote Quick reply to this message
  #5  
Old 10-24-2012
venky2600's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 1,186
Threads: 119
Thanked 821 Times in 434 Posts
Reputation: 831
Send a message via Yahoo to venky2600
Post

B) amiodarone----pulmonary fibrosis
Reply With Quote Quick reply to this message
  #6  
Old 10-25-2012
USMLE Forums Scout
 
Steps History: Step 1 Only
Posts: 73
Threads: 7
Thanked 25 Times in 13 Posts
Reputation: 35
Default

B. Amiodarone.

busulfan and bleomycin give the same picture.
Reply With Quote Quick reply to this message
  #7  
Old 10-25-2012
nooranimm's Avatar
USMLE Forums Scout
 
Steps History: Not yet
Posts: 75
Threads: 3
Thanked 35 Times in 23 Posts
Reputation: 45
Default

Amiodarone causing pulmonary fibrosis and hence the findings in the case.
Reply With Quote Quick reply to this message
  #8  
Old 10-25-2012
Teona's Avatar
USMLE Forums Guru
 
Steps History: 1+CK+CS
Posts: 331
Threads: 39
Thanked 308 Times in 117 Posts
Reputation: 318
Default

Quote:
Originally Posted by MedicalExaminer View Post
A 73-year-old man who has atrial fibrillation has been treated pharmacologically for 10 years. He presents to his primary care physician complaining of generalized dyspnea. Pulmonary function tests show forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) are both less than 70% of the predicted value, with a ratio of FEV1 to FVC of 81%. The flow-volume curve is shown in the image. Which of the following is a possible etiology of this presentation?

A Adult-onset asthma
B Amiodarone
C Diltiazem
D Sotalol
E Tobacco
My answer is B) Amiodarone
Reply With Quote Quick reply to this message
  #9  
Old 10-25-2012
billy's Avatar
USMLE Forums Guru
 
Steps History: Not yet
Posts: 444
Threads: 109
Thanked 370 Times in 208 Posts
Reputation: 380
Post

Amiodarone
Reply With Quote Quick reply to this message
  #10  
Old 10-25-2012
MedicalExaminer's Avatar
USMLE Forums Master
 
Steps History: 1+CK+CS+3
Posts: 824
Threads: 66
Thanked 465 Times in 298 Posts
Reputation: 475
Default

The correct answer is B. This is a clinical picture of restrictive lung disease; the FEV1:FVC ratio is approximately normal, but both are dramatically reduced. Amiodarone is an antiarrhythmic that can cause pulmonary fibrosis, a restrictive lung disease.

Answer A is incorrect. Asthma is a cause of chronic obstructive pulmonary disease.

Answer C is incorrect. Diltiazem is an antiarrhythmic that is sometimes used in intravenous form to treat atrial fibrillation. It infrequently causes hypotension or bradyarrhythmias, but is not known to cause pulmonary fibrosis.

Answer D is incorrect. Sotalol has both α-blocking and action potential-prolonging activity. It is used for treatment of ventricular and supraventricular arrhythmias in children and for life-threatening ventricular arrhythmias in adults. It can sometimes cause torsades de pointes when taken at higher doses. However, sotalol does not cause pulmonary fibrosis.

Answer E is incorrect. Tobacco is a known risk factor for chronic obstructive pulmonary disease (COPD). COPD presents with an FEV1:FVC ratio of <80% and a sloping flow-volume curve.
__________________
Everything is possible for him who believes (MARK 9:23)
245/247/passed on 1st attempt/223/2mos Obsie /3 US LORS/visa not needed/2008 grad
Reply With Quote Quick reply to this message
The above post was thanked by:
vnagubandi (12-03-2012)
  #11  
Old 11-27-2012
USMLE Forums Scout
 
Steps History: ---
Posts: 15
Threads: 0
Thanked 1 Time in 1 Post
Reputation: 11
Default

feature of restrictive disease..go with amiodarone as it cause pulmonary fibrosis
Reply With Quote Quick reply to this message



Reply

Tags
Figures-, Pathology-, Physiology-, Respiratory-, Step-1-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
Question at the end of SD curve ! step_enhancer USMLE Step 2 CK Forum 7 09-15-2012 08:39 PM
Pressure volume curve in aortic stenosis heman466s USMLE Step 1 Forum 0 10-18-2011 11:05 PM
Which of the following can best explain the flow-volume curve? bebix USMLE Step 1 Forum 10 07-04-2011 08:04 AM
Lung volume-pressure curve question bebix USMLE Step 1 Forum 10 07-01-2011 11:33 AM
Hb Oxygen Dissociation Curve Question INCOGNITO USMLE Step 1 Forum 12 06-14-2011 12:47 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)