Basic Arrhythmias Flashcards Preview

Paramedic > Basic Arrhythmias > Flashcards

Flashcards in Basic Arrhythmias Deck (77)
Loading flashcards...
0

What are the two types of cells in the heart?

Electrical cells
Mechanical cells

1

What do electrical cells do?

Initiate and conduct impulses

2

What do mechanical cells do?

Contract in response to stimulation

3

What is polarization?

Electrical charges are balanced and ready for discharge

4

What is depolarization?

Discharge of energy that accompanies the transfer of electrical charges across the cell membrane

5

What is repolarization?

Return of electrical charges to original state

6

What part of the heart pathway stimulates the mechanical cells?

Perkinje fibers

7

What is the inherent rate of the SA node?

60-100

8

What is the inherent rate of the AV junction?

40-60

9

What is the inherent rate of the ventricles?

20-40

10

What determines what will be the pacemaker?

The site with the fastest rate

11

What is the normal pacemaker?

SA node

12

What is it called when a site speeds up and takes over as pacemaker?

Irritability

13

What is it called when the normal pacemaker slows down or fails and a lower site assumed pacemaker responsibility?

Escape

14

Sympathetic stimulation causes what three things with the heart?

Increase heart rate
Increase AV conduction
Increase irritability

15

Parasympathetic stimulation causes what three things in the heart?

Decreased heart rate
Decreased AV conduction
Decreased irritability

16

What does the sympathetic branch influence in the heart?

Both the atria and the ventricles

17

What does the parasympathetic branch influence in the heart?

Atria

18

Is it negative or positive inside a cardiac cell?

Negative

19

Is it positive or negative outside a cardiac cell?

Positive

20

What electrolyte is inside cardiac cells?

Potassium

21

What electrolyte is outside a cardiac cell?

Sodium

22

What is the isoelectric line?

Straight line produced on EKG machine that means no current is flowing

23

If the flow of electricity is toward the positive electrode what will the EKG machine produce?

An upward deflection

24

If the flow of electricity is toward the negative electrode what will the EKG machine produce?

A downward deflection

25

How much time in between two tic marks?

3 seconds

26

What does the height of the deflection indicate?

The voltage

27

Which lines measure voltage?

Horizontal

28

Which line measures time?

Vertical lines

29

How much time is in between two heavy vertical lines on an EKG graph?

.20 seconds