Campus Collusion
Review Questions for Test Preparation

       
    

  



Lecture 7- circulatory function cont'd

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

Page 1
Skip Navigation Links
Question Answer
What is an EKG/ ECG?
Show Answer
recording of electrical activity of hear. Dysrhythmias cause changes in the patterns of electical activity. Reflected by changes in EKG tracing.
Describe the different waves shown on an EKG.
Show Answer
Pwave represents depolarization of SA node and atria. Isoelectric line between P and Q wave represents depolarization of AV node, bundle branches and purkinje system. QRS complex represents ventricular depolarization( atria repolarize at the same time). Twave represents ventricular repolarization
Show Answer
What are the types of sinus node dysrythmias?
Show Answer
1. Sinus bradycardia <60/min 2. Sinus tachycardia >100/min
Describe atrial fibrilation.
Show Answer
Grossly disorganized atrial depolarization,with irregular rate and rhythm. a. conduction through AV node disorganized = grossly irregular pulse. b. since atria do not contract in coordinated manner, pooling of blood occurs resulting in potential thrombus formation and systemic emboli.
Heart block is the abnormal conduction through the ________node/_______________.
Show Answer
AV bundle of his
Heart block is the abnormal conduction through the ________node/_______________.
Show Answer
AV bundle of his
Heart block is the abnormal conduction through the ________node/_______________.
Show Answer
AV bundle of his
Heart block is the abnormal conduction through the ________node/_______________.
Show Answer
AV bundle of his
Heart block is the abnormal conduction through the ________node/_______________.
Show Answer
AV bundle of his
Download these questions to your phone here
Why are ventricular dysrhythmias more serious than atrial dysrhythmias?
Show Answer
Potential to interfere with the pumping action of heart.
Ventricular fibrillation ...
Show Answer
Ventricles quiver but do not contract. Leads to decreased CO and can be fatal unless successfully treated with defibrillation. EKG totally disorganized
What is the difference between first, second, and third degree heart block?
Show Answer
first - delayed conduction (prolonged PR interval) second- intermittent failure of conduction of one or more impulses from atria to ventricles (several Pwave for one QRS. third - link between atria and ventricles lost. Beat independently of eachother.
Ventricular tachycardia leads to _______________&____________.
Show Answer
decreased diastolic filling time and decreased cardiac output
What is the main concern with premature ventricular complex/contraction?
Show Answer
Ventricles not sufficiently filled to eject blood, since depolarization is premature.
Describe the function of the conduction system.
Show Answer
Coordinates atrial and ventricular acitvity to generate teh pumping action of the heart that moves blood through the blood vessels.
SA node
Show Answer
controls atrial activity. Rate 60-100 beats/min
AV Node
Show Answer
connects the conduction systems of atria and ventricles coordinating their contractions to optimize ventricular filling. Rate is 40-60beats/min
Purkinje system
Show Answer
controls ventricular activity. Condction is rapid, so excitation of entire right and lefet ventricles occures almost simultaneously resulting in increased cardiac output. bundle of his/ AV bundle bundle branches purkinje fibers
Why is calcium considered a membrane stabilizer?
Show Answer
Makes it more difficult for Na+ to enter the cell membrane.
  
Page 1 Skip Navigation Links
Not what your looking for, continue searching

    
Skip Navigation Links