Brainscape's Knowledge GenomeTM

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


See full index

Block 6 - Physiology > ECG Basics And Interpretation > Flashcards

ECG Basics And Interpretation Flashcards

1
Q

Name and locate the normal placement of a 12 lead ECG.

A
  • Lead on right arm, left arm, and one leg

- 6 Precoridal leads around heart (V1 most medial and V6 most lateral)

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

Define Mean Electrical Axis.

Where does it commonly point?

A

Vector that shows where most depolarization occurs - where there is the most muscle mass. Most commonly left ventricle

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

Identify Normal rhythm and its conduction pattern

A

Rhythm: small/positive P waves, large/positive/narrow QRS, 1:1 ratio b/t P waves and QRS, consistent HR

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

Identify sinus bradycardia rhythm and its conduction pattern

A

Heart rate under 60 BPM - everything else is normal (waves, complexes, and intervals)

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

Identify sinus tachycardia rhythm and its conduction pattern

A

Heart rate over 100 BPM - everything else is normal (waves, complexes, and intervals)

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

Identify atrial flutter rhythm and its conduction pattern

A
  • Rapid, regular atrial depolarizations
  • Multiple P waves, not a QRS Complex for every P wave
  • QRS is normal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Identify ventricular tachycardia rhythm and its conduction pattern

A
  • Missing P waves

- Wide QRS Complex (that’s all you see on ECG)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Identify ventricular fibrillation rhythm and its conduction pattern

A
  • Tiny up and down wave across ECG

- Uncoordinated depolarization…not ejecting any blood at all

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Identify 1st degree block rhythm and its conduction pattern

A
  • Prolonged PR Interval
  • Normal Heart rate
  • Decreased AV Nodal Delay
  • Common in highly trained athletes
  • SA Node still fires properly, it just takes longer to cross AV node
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Identify atrial fibrillation rhythm and its conduction pattern

A
  • Irregular QRS Complex
  • P waves present?
  • No coordination of atrial depolarization
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Explain how to find the rate and rhythm with a given ECG.

A
  1. Count number of “big squares” between successive R waves (in QRS complex)
  2. Divide 300 by that number.
    * If the wave is between two big squares, like 3 and 4, then the rate would be between 75 and 100.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which leads do you look at to calculate MEA?

A

Lead I and aVF

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

Predict the effect of myocardial damage on impulse conduction

A

-

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

What changes will be seen in an ECG for hyperkalemia?

A
  • Progressive changes…
    1. Peaked T-waves
    2. Prolonged PR Interval
    3. Widened QRS—merges with T wave
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is positive and what is negative in Lead I?

A

Positive: Left Arm
Negative: Right Arm

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

What is positive and what is negative in Lead II?

A

Positive: Legs
Negative: Right Arm

17
Q

What is positive and what is negative in Lead III?

A

Positive: Legs
Negative: Left Arm

18
Q

What is positive and what is negative in Lead aVL?

A

Positive: Left Arm
Negative: Right Arm and Legs

19
Q

What is positive and what is negative in Lead aVR?

A

Positive: Right Arm
Negative: Left Arm and Legs

20
Q

What is positive and what is negative in Lead aVF?

A

Positive: Legs
Negative: Arms

21
Q

Which type of leads are used to localize infarcts?

A

Precordial

22
Q

Identify 2nd degree block rhythm and its conduction pattern

A
  • The P wave to QRS ratio is greater than 1:1
  • Type I: PR interval gets progressively longer and then eventually a beat is dropped (missing QRS)
  • Type II: PR Interval is set and there is eventually a beat dropped
23
Q

Identify 3rd degree block rhythm and its conduction pattern

A
  • P waves and QRS have regular rhythm but are not in sync with each other
  • QRS can be widened
24
Q

What is R-Wave Progression?

A

As you move from V1 to V6 (precordial leads) the R wave gets progressively taller and more positive.
This is a good way to determine if someone is having a heart attack or ischemic event (R wave breaks down in these patient’s)

25
Q

What does a change in MEA indicate?

A

Hypertrophy or dilation

26
Q

Where is aVF positive and negative?

A

Positive towards apex (bottom of heart)

Negative towards base (top of heart)

27
Q

Where is Lead I positive and negative?

A

Positive towards left side of heart (anatomically)

Negative towards right side of heart (anatomically)

28
Q

What does a Negative Lead I and Positive aVF indicate?

A

Right axis deviation

29
Q

What does a Negative Lead I and Negative aVF indicate?

A

Indeterminate Axis

30
Q

What does a Positive Lead I and Positive aVF indicate?

A

Normal Axis

31
Q

What does a Positive Lead I and Negative aVF indicate?

A

Left Axis Deviation

Block 6 - Physiology (3 decks)

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