Campus Collusion
Review Questions for Test Preparation

       
    

  



Cardiovascular SystemMedical Surgical Nursing

Review Online for Free
Lies about Study Techniques: Believe them at your own risk.
www.NursingInAFlash.com

Page 2
Skip Navigation Links
Question Answer
Describe the general pathway of the electrical current in the heart, starting with the SA Node...
Show Answer
SA Node-beginning Travels through the atria to the AV node Bundle of His Left and Right Bundle Branches (splits along the septum into each of the ventricles) Purkinje Fibers (along the ventricle walls) Ventricles contract
What event signifies the beginning of the cardiac conduction cycle?
Show Answer
The SA node depolarizing
What event signifies the end of the cardiac conduction cycle?
Show Answer
The contraction of the ventricles causing blood ejection into the pulmonary and systemic circulations (repolarization)
When is the cardiac muscle in the absolute refractory period (meaning it will not respond to any stimuli), during systole or diastole?
Show Answer
Systole
When is the cardiac muscle in the relative refractory period (meaning it is regaining excitability), during systole or diastole?
Show Answer
Diastole
The P wave on the electrocardiogram signifies what cardiac event?
Show Answer
The firing of the SA node (atrial depolarization)
QRS on the electrocardiogram signifies what cardiac event?
Show Answer
The firing of the AV node (depolarization of the AV node, roughly represents depolarization of the ventricles)
What does the T wave on an electrocardiogram represent?
Show Answer
Repolarization of the ventricles
What does the U wave on an electrocardiogram represent?
Show Answer
Can represent polarization of the Purkinje fibers (if seen) or it can be indicative of hypokalemia
What does the intervals between the P, QRS, T and U waves indicate?
Show Answer
The amount of time it takes an action potential to travel from one place in the heart to another.
Download these questions to your phone here
________ results in the ejection of blood from the ventricles.
Show Answer
Systole
_______ is the period when blood fills the ventricles.
Show Answer
Diastole
_______ is the amount of blood pumped by each ventricle in one minute.
Show Answer
Cardiac output
What is the normal amount of cardiac output in a resting adult?
Show Answer
4-8 L/min
What is a Cardiac Index?
Show Answer
It is a calculation that adjusts the expected cardiac output by body size. The CO is divided by the patient's body surface area (BSA).
What is the normal range for the Cardiac Index (CI)?
Show Answer
2.8-4.2 L per minute per meter squared
What factors impact stroke volume (SV)? (3)
Show Answer
Preload, Contractility, Afterload
The volume of blood in the ventricles at the end of diastole, prior to the next contraction is called...
Show Answer
Preload
In relation to Frank Starling's law, what does the amount of preload determine?
Show Answer
The amount of stretch placed on the myocardial fibers.
What is Frank Starling's Law?
Show Answer
The greater the myocardial fibers are stretched, the greater the force of their contraction.
How does increased contractility of myocardial fibers cause increased SV?
Show Answer
It increases ventricular emptying (more contractility = a more forceful squeeze, resulting in more blood being pushed out)
  
Page 2 Skip Navigation Links
Not what your looking for, continue searching

    
Skip Navigation Links