« previous next »

Author Question: Calculate the ejection fraction of a female patient with a stroke volume of 40 mL and an ... (Read 60 times)

D2AR0N

  • Hero Member
  • *****
  • Posts: 561
on: Jul 16, 2018
Calculate the ejection fraction of a female patient with a stroke volume of 40 mL and an end-diastolic volume of 125 mL.
 
  a. 0.32
  b. 3.1
  c. 85
  d. 165

Question 2

What is the most determining factor for preload?
 
  a. Contractility
  b. Venous return
  c. Ejection fraction
  d. Vascular resistance


ecox1012

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
Ejection fraction is calculated using the ratio of stroke volume to the ventricular end-diastolic volume. In this case the ejection fraction is 40 mL/125 mL = 0.32.

Answer to Question 2

ANS: B
Preload, the filling pressure of the ventricle at the end of ventricular diastole is dependent on the level of venous return and in addition the compliance of the ventricles. Contractility is the force that the ventricle generates during each cardiac cycle and is estimated using the ejection fraction. Vascular resistance is a measurement used to determine the afterload of a ventricle, or the force the heart needs to overcome to eject the blood from the ventricles.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Urinary catheterization. The procedure involves the insertion of a flexible tube, or catheter, throu Urinary catheterization. The procedure involves the insertion of a flexible tube, or catheter, throu
Empathy draws a more positive response from the patient because it is based on the willingness of th Empathy draws a more positive response from the patient because it is based on the willingness of th
Cleanse a linear wound by using a new sterile gauze pad for each stroke, beginning next to the wound ... Cleanse a linear wound by using a new sterile gauze pad for each stroke, beginning next to the wound ...
A medical assistant helps a patient walk with a gait belt. A medical assistant helps a patient walk with a gait belt.
How to calculate simple interest (Part 5; r = I/Pt) How to calculate simple interest (Part 5; r = I/Pt)
Ex vivo and in vivo gene therapy for a patient with a liver disorder Ex vivo and in vivo gene therapy for a patient with a liver disorder
Video: Structures that affect circulation - heart and MABP

For a complete list of videos, visit our video library