Cardiac Definitions And Conduction System Stokke N180

17 Questions | By KimW1234 | Last updated: Mar 21, 2022 | Total Attempts: 151

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These questions are according to my notes - there may be some mistakes or some missing information. If there is something that you see is wrong, please let me know. If you miss something on our test because of my answers here, I am sorry (but I still do not take responsibility for your grade). :) In other words, I hope it helps, but if it doesn't, don't blame me. :)

Questions and Answers

1.

Define: Automaticity
- A.
  
  The cardiac cell's ability to create an electrical impulse
- B.
  
  The cardiac cell's ability to respond to an electrical impulse
- C.
  
  The ability of a cardiac cell to contract in response to an impulse
- D.
  
  The inability of a cardiac cell to respond to an impulse - a necessary recovery time.
- E.
  
  The ability of a cell to conduct an impulse to another cell
2.

Define: Excitability
- A.
  
  The cardiac cell's ability to create an electrical impulse
- B.
  
  The cardiac cell's ability to respond to an electrical impulse
- C.
  
  The ability of a cardiac cell to contract in response to an impulse
- D.
  
  The inability of a cardiac cell to respond to an impulse - a necessary recovery time.
- E.
  
  The ability of a cell to conduct an impulse to another cell
3.

Define: Conductivity
- A.
  
  The cardiac cell's ability to create an electrical impulse
- B.
  
  The cardiac cell's ability to respond to an electrical impulse
- C.
  
  The ability of a cardiac cell to contract in response to an impulse
- D.
  
  The inability of a cardiac cell to respond to an impulse - a necessary recovery time.
- E.
  
  The ability of a cell to conduct an impulse to another cell
4.

Define: Contractility
- A.
  
  The cardiac cell's ability to create an electrical impulse
- B.
  
  The cardiac cell's ability to respond to an electrical impulse
- C.
  
  The ability of a cardiac cell to contract in response to an impulse
- D.
  
  The inability of a cardiac cell to respond to an impulse - a necessary recovery time.
- E.
  
  The ability of a cell to conduct an impulse to another cell
5.

Define: Refractory period
- A.
  
  The cardiac cell's ability to create an electrical impulse
- B.
  
  The cardiac cell's ability to respond to an electrical impulse
- C.
  
  The ability of a cardiac cell to contract in response to an impulse
- D.
  
  The inability of a cardiac cell to respond to an impulse - a necessary recovery time
- E.
  
  The ability of a cell to conduct an impulse to another cell
6.

It is difficult, though possible, to stimulate a cell during the absolute refractory period.
- A.
  
  True
- B.
  
  False
7.

It is difficult, though possible, to stimulate a cell during the relative refractory period.
- A.
  
  True
- B.
  
  False
8.

S/Sx of decreased cardiac output are _____________.
- A.
  
  Chest pain, hypertension, and increased heart rate
- B.
  
  Hypotension, increased heart rate, and thready pulse
- C.
  
  Chest pain, hypotension, and decreased heart rate
9.

Tachycardia often results in __________________.
- A.
  
  Coronary artery overload for too much blood being pushed into the coronary arteries at too quick a rate.
- B.
  
  Decreased coronary artery perfusion because the heart is pumping too quickly to allow the coronary arteries to fill.
- C.
  
  Coronary artery aneurisms because the blood is pushed and has no where to go, so it forces a bulge in the arteriol wall.
10.

An escape rhythm is defined as a rhythm that ___________.
- A.
  
  Originates in some other spot in the conduction system due to SA node failure
- B.
  
  Increases the heart rate in response to the "fight or flight" response
- C.
  
  Originates in a random cell in the ventricles due to increased excitability of that particular cell
11.

The _________ is the electrical pathway between the SA and the AV nodes.
- A.
  
  Bundle of His
- B.
  
  Bachmann's Bundle
- C.
  
  Intermodal pathway
12.

The _________ is the electrical pathway between the SA and the Left Atrium.
- A.
  
  Bundle of His
- B.
  
  Bachmann's Bundle
- C.
  
  Intermodal pathway
13.

The _________ slows the impulse, allowing the atria to contract and push blood into ventricles.
- A.
  
  Bundle of His
- B.
  
  Bachmann's Bundle
- C.
  
  Intermodal pathway
14.

The ________________, also known as the "junctional area," is located between the atria and ventricles and can act as pacemaker for the heart in the event that the SA node is not functional.
- A.
  
  AV node
- B.
  
  Intermodal pathway
- C.
  
  Perkinjie fibers
15.

The ________________ is/are located in the ventricles and transmits the impulse throughout the ventricles at such a fast rate that they contract together.
- A.
  
  AV node
- B.
  
  Right and left bundle branches
- C.
  
  Perkinjie fibers
16.

The ________________ is/are located in the ventricles and is the next step on the pathway of conduction after the Bundle of His.
- A.
  
  Bachmann's bundle
- B.
  
  Right and left bundle branches
- C.
  
  Perkinjie fibers
17.

Cardiac output is defined as ______________ and is equal to ______________.
- A.
  
  The amount of blood the heart expels in each beat; HR x (Preload/afterload)
- B.
  
  The amount of blood the heart expels in 1 minute; HR x SV
- C.
  
  The amount of blood the heart expels while the patient is at rest; SV - Afterload