Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Cardiac Emergencies > ECG Interpretation > Flashcards

ECG Interpretation Flashcards

1
Q

Without normal rhythm

A

Arrhythmia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Disturbance of rhythm

A

Dysrhythmia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Studies the electrical properties of biological cells and tissues

A

Electrophysiology

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Two functions of Cardiac Output

A
  1. Electrical Function
  2. Mechanical Function
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Electrical impulses stimulate the heart to contract. Initiated by Pacemaker cell

A

Electrical Function

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Actual contraction of the heart to generate a palpable pulse. Work of myocardial cells

A

Mechanical Functions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Two types of Cardiac Cells

A
  1. Myocardial cells
  2. Pacemaker cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  • No automaticity
  • No impulse
  • No contraction
A

Myocardial Cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  • Automaticity
  • Increased concentrations of Ca++ in the blood increases automaticity
  • Decreased concentrations of K+ decreases automaticity
A

Pacemaker Cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

4 intrinsic properties of Cardiac Cells

A
  • Excitability (irritability)
  • Conductivity
  • Automaticity
  • Contractility
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Ability of cardiac muscle cells to respond to an outside stimulus such as that from a chemical, mechanical or electrical source

A

Excitability (irritability)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Ability of a cardiac cell to receive an electrical stimulus and conduct that impulse to an adjacent cardiac cell

A

Conductivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Ability of pacemaker cells to initiate an electrical impulse without being stimulated from another source

A

Automaticity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The ability to contract/shorten in length

A

Contractility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Electrical Stimulation occurs through two avenues

A
  • Parasympathetic
  • Sympathetic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Alpha 1 receptor

A

Arteries= constrict
Lungs= mild bronchoconstriction

17
Q

Beta-1 receptor

A

Heart= increased dromotropic, inotropic, Chronotropic

18
Q

Beta-2 receptor

A

Lungs= smooth bronchial muscle dilation
Arteries= Dilate

19
Q

Change in heart rate

A

Chronotropic

20
Q

Strength of contractility

A

Inotropic

21
Q

Speed of conduction

A

Dromotropic

22
Q

Prepares body to respond to various stresses. Norepinephrine/epinephrine release from adrenal medulla

A

Sympathetic Nervous System

23
Q

Sympathetic Nervous system also known as

A

Adrenergic System

24
Q

Another name for Parasympathetic Nervous system

A

Cholinergic System

25
Q

Cardiac cells contain a large number of mitochondria and abundant reserves of myoglobin that store O2. WHY?

A

So that the heart doesn’t fatigue

26
Q

Polarization

A

Resting

27
Q

Depolarization

A

Stimulation

28
Q
  • Myocardial cells are bathed in electrolyte solution
  • Chemical pumps maintain concentration of ions within cell
  • Stimulus from the conduction system
A

Depolarization

29
Q
  • Closing of the sodium and calcium channels
  • Restores the negative charge
  • Sodium-potassium pump (3 Na+ out, 2K+ in)
A

Repolarization

30
Q
  • rapid influx of Na+
  • Slow influx of Ca++ K+ leaves cell
  • Approximately -90 millivolts to +30 millivolts
A

Phase 0- Depolarization (contraction)

31
Q
  • Na+ slowly closes
  • Cl- enters cell
  • K+ still leaving cell
  • Resulting in a slight decreases in positive electrical charges in cell
A

Phase 1

32
Q
  • Ca++ slowly enters cell
  • K+ still slowly leaving cell
  • resulting in a similar positive and negative ion exchange
  • Across the cell membrane
A

Phase 2- Plateau phase

33
Q
  • Na+ and Ca++ channels close
  • K+ quickly leaving cell
  • Resulting in a more negative charge inside cell
A

Phase 3- Repolarization

34
Q
  • Sodium-potassium pump
  • 3 Na+ out, 2 K+ in
  • Resulting in relaxation of the cardiac muscle
A

Phase 4- Resting Membrane Potential

35
Q

Myocardial cell will not respond to stimulus. Corresponds with onset of QRS to peak of T wave. Phase 0, 1, 2 and part of 3

A

Absolute Refractory Period

36
Q

Can be stimulated. Corresponds with downslope of T wave

A

Relative Refractory Period

Cardiac Emergencies (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions