Epinephrine Effect on Respiration! - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
USMLE Articles
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

Thread Tools Search this Thread Display Modes
Old 08-09-2011
USMLE Forums Scout
Steps History: Not yet
Posts: 99
Threads: 29
Thanked 89 Times in 37 Posts
Reputation: 99
Drug Epinephrine Effect on Respiration!

A 32-year-old woman with pheochromocytoma is being treated with phenoxybenzamine. After surgical excision of the tumor, the patient has an episode of hypotension requiring 30 seconds of cardiopulmonary resuscitation and subsequent treatment in the intensive care unit. The attending physician asks his intern what physiologic responses he would expect to see if the patient had been given epinephrine during resuscitation. What would have been observed following administration of epinephrine?

(A) Decrease in blood pressure
(B) Decrease in heart rate
(C) Increase in blood pressure
(D) Increase in respiratory rate
(E) No changes in vital signs

Answer with explanation plz thanks in advance...
Reply With Quote Quick reply to this message

Old 08-09-2011
surez18's Avatar
USMLE Forums Veteran
Steps History: Step 1 Only
Posts: 208
Threads: 30
Thanked 183 Times in 74 Posts
Reputation: 193
Correct Answer ans A..

they r given phenoxybenzamine its alpha blocker.. so epineprines beta action unopposed.. its laeds to dec in BP,,,
Reply With Quote Quick reply to this message
The above post was thanked by:
patho2012 (01-08-2012)
Old 08-10-2011
qurat21's Avatar
USMLE Forums Master
Steps History: 1 + CK
Posts: 623
Threads: 62
Thanked 289 Times in 186 Posts
Reputation: 299

irreversible blockade of alpha receptors so epi acts on beta 1 n 2 so increase HR n decrease BP
Reply With Quote Quick reply to this message


Pharmacology-, Physiology-, Respiratory-, Step-1-Questions

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
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.
Where you live. Leave blank if you don't want to tell.


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
Effects of Epinephrine and Phenylphrine on Diastolic Blood Pressure! apx85 USMLE Step 1 Forum 8 01-20-2016 12:49 PM
Murmur Intensity with Respiration rasheed USMLE Step 2 CK Bits & Pieces 3 12-10-2014 07:24 PM
Perfusion Limited Versus Diffusion Limited Respiration heights USMLE Step 1 Bits & Pieces 0 05-04-2011 10:06 PM
Muscles of Respiration rasheed USMLE Step 1 Bits & Pieces 0 08-30-2009 09:36 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)