Explanation for the high pulse pressure? - 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 11-26-2011
USMLE-Syndrome's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,203
Threads: 180
Thanked 1,254 Times in 441 Posts
Reputation: 1268
Sphygmomanometer Explanation for the high pulse pressure?

A 65 yr. old male visits his family practitioner for a yearly examination. Measurement of his blood pressure reveals a systolic pressure of 190 mm Hg and a diastolic pressure of 100 mm Hg. His heart rate is 74/min and pulse pressure is 90 mm Hg. A decrease in which of the following is the most likely explanation for the high pulse pressure?
A. Arterial compliance
B. Cardiac output
C. Myocardial contractility
D. Stroke volume
E. Total peripheral resistance
Reply With Quote Quick reply to this message
The above post was thanked by:
inno (11-28-2011)



  #2  
Old 11-27-2011
USMLE Forums Addict
 
Steps History: Not yet
Posts: 114
Threads: 23
Thanked 20 Times in 18 Posts
Reputation: 39
Default

decrease in arterial compliance (A)
Reply With Quote Quick reply to this message
  #3  
Old 11-27-2011
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 281
Threads: 74
Thanked 132 Times in 69 Posts
Reputation: 142
Help whats the right ans?

e.Total Peripheral resistance

I think thats the answer.Anyone else?
Reply With Quote Quick reply to this message
 
  #4  
Old 11-27-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 35
Threads: 8
Thanked 8 Times in 8 Posts
Reputation: 18
Default It's A

It says decrease to cause high pulse pressure not increase Increase would be all the other except A. A decrease in compliance would lead to high pulse pressure
Reply With Quote Quick reply to this message
  #5  
Old 11-27-2011
USMLE Forums Scout
 
Steps History: 1+CK+CS
Posts: 31
Threads: 2
Thanked 15 Times in 9 Posts
Reputation: 25
Default My ans is A too!

Its 'A' bec a decrease in compliance will make the vessels less distensible. Hence, it will lead to increase in pressure much like what occurs in atherosclerosis.
Reply With Quote Quick reply to this message
  #6  
Old 11-28-2011
USMLE Forums Newbie
 
Steps History: Not yet
Posts: 5
Threads: 2
Thanked 0 Times in 0 Posts
Reputation: 10
Default

decreased arterial compiance
Reply With Quote Quick reply to this message
  #7  
Old 11-28-2011
yasirsattar75's Avatar
USMLE Forums Guru
 
Steps History: Not yet
Posts: 395
Threads: 51
Thanked 293 Times in 111 Posts
Reputation: 303
Default

Yeah its A ! And as age gives clue to this answer also alongwith pulse pressure and compliance relation
__________________
study study till ur brain is saturated
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
  #8  
Old 11-29-2011
USMLE Forums Veteran
 
Steps History: Not yet
Posts: 281
Threads: 74
Thanked 132 Times in 69 Posts
Reputation: 142
Help

Hey you guys are right I think its A as when the compliance decreases the elasticity goes up and so the pulse pressure increases. But could any one please explain why in anaemia or septic shock the decrease in the peripheral resistance will increase the pulse pressure which is the E option in the above question.
Reply With Quote Quick reply to this message
  #9  
Old 11-29-2011
USMLE-Syndrome's Avatar
USMLE Forums Master
 
Steps History: ---
Posts: 1,203
Threads: 180
Thanked 1,254 Times in 441 Posts
Reputation: 1268
Default

A it is..A decrease in arterial compliance indicates that the arterial wall is stiffer (i.e., less distensible). When the compliance of the arterial system decreases, the rise in arterial pressure becomes greater for a given stroke volume pumped into the arteries. In the normal young adult, the systolic blood pressure is about 120 mm Hg and the diastolic blood pressure is about 80 mm Hg. Because the pulse pressure is the difference between the systolic and diastolic blood pressures, the normal pulse pressure is about 40 mm Hg in a healthy young adult. However, in older adults the pulse pressure sometimes increases as much as two times normal because the arteries become hardened by arteriosclerosis
Reply With Quote Quick reply to this message



Reply

Tags
Cardiovascular-, Physiology-, 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
Mean Arterial Pressure versus Mean Systemic Filling Pressure? researchmedicine USMLE Step 1 Forum 2 09-15-2011 10:00 PM
Phenylephrine and the effect on pulse pressure! chienpolska USMLE Step 1 Forum 1 08-20-2011 01:06 PM
The concept of wide versus narrow Pulse Pressure Ace3 USMLE Step 1 Forum 20 07-30-2011 05:57 PM
Pulse Pressure and Vessel Compliance bronchiole USMLE Step 1 Forum 8 07-30-2011 09:26 AM
mechanism for elevated pulse rate khushboo USMLE Step 1 Forum 14 09-16-2010 08:30 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)