Brainscape's Knowledge GenomeTM

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


See full index

Ekg > junctional test > Flashcards

junctional test Flashcards

1
Q

Which of the following statements regarding atrioventricular (AV) nodes and junctional rhythms is incorrect?

A

Junctional rhythms are a result of electrical impulses coming from the SA node.

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

__________blank cause(s) the unique inverted P wave morphology seen in junctional dysrhythmias.

A

The reverse flow of electrical activity, coming from the AV node or junction,

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

What is the normal, inherent rate of the AV node?

A

40-60 bpm

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

Junctional rhythms occur because the electrical impulse comes from the AV junction instead of the ________blank.

A

SA node

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

In junctional rhythms, where does the electrical current initiate?

A

AV junction

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

What causes the inverted P wave morphology found with junctional rhythms?

A

Electrical impulses are coming from the AV node, causing atrial depolarization to flow retrogradely.

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

What does the term “retrograde” mean?

A

Backward

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

What are the distinguishing characteristics of PJCs?

A

They cause the underlying rhythm to be irregular; the P wave is inverted and may appear before, during, or after the QRS complex.

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

What symptoms will a patient have if PJCs occur more than four to six times per minute?

A

Hypotension, irregular pulse

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

Which of the following is a single early electrical impulse that originates in the AV junction, occurring before the next expected sinus impulse and causing an irregularity in the rhythm?

A

PJC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of rhythm occurs when the SA node fails to initiate the electrical activity and one of the backup pacemaker sites takes over?

A

Junctional escape rhythm

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

What is the ventricular heart rate for junctional escape rhythm?

A

40-60 bpm

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

What are the distinguishing characteristics of junctional escape rhythm?

A

The rhythm is regular; the P wave may occur before, during, or after the QRS; and the P wave is inverted.

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

What symptoms might occur in a patient with junctional escape rhythm?

A

Hypotension, confusion, and disorientation

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

What is the ventricular heart rate range for accelerated junctional rhythm?

A

60-100 bpm

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

What is the difference between accelerated junctional rhythm and junctional escape rhythm?

A

heart rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Why is it unlikely that a patient would have symptoms of low cardiac output with accelerated junctional rhythm?

A

The heart rate is the same as normal sinus rhythm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the ventricular heart rate with junctional tachycardia?

A

100-180 bpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the difference between accelerated junctional rhythm and junctional tachycardia?

A

heart rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The effect of junctional tachycardia on the patient depends on ________blank.

A

the rate of the rhythm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the term for a fast, “fluttering” heartbeat sensation felt by a patient?

A

palpitation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When is junctional tachycardia considered to be serious or life threatening?

A

After a recent myocardial infarction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which of the following is one criterion for classifying a dysrhythmia as an SVT?

A

heart rate between 150 and 250 bpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Which of the following is one criterion for classifying a dysrhythmia as an SVT?

A

Ventricular tachycardia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What symptom might a stable patient complain about when experiencing SVT?

A

palpitations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is the origination point of an SVT?

A

Atria or junctional region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What might you be asked to do when a patient has a supraventricular dysrhythmia?

A

Increase the paper speed so the tracing can be analyzed more accurately

28
Q

In terms of treating the patient, when a patient has a supraventricular tachycardia, when should the specific type of dysrhythmia be identified?

A

When the patient first complains of any signs or symptoms

29
Q

What is the term for an ectopic focus originating above the ventricles in the atria or junctional region?

A

Supraventricular

30
Q

What is the term for a condition in which a patient’s blood pressure is not adequate to maintain good blood supply to the vital organs?

Multiple Choice

A

hypotension

31
Q

The PR interval can be measured only if the P wave occurs ________blankblank the QRS complex.

A

before

32
Q

Which of the following originates from the AV junction?

Multiple Choice

A

Junctional escape rhythm

33
Q

Which of the following treatments may be needed to terminate junctional tachycardia?

A

medication

34
Q

Wolff-Parkinson-White syndrome is an example of which type of dysrhythmia?

A

Reentry dysrhythmia

35
Q

What is the primary difficulty in classifying an SVT?

A

Determining the origin of the tachycardia

36
Q

What type of heart rate is characteristic of a patient who has junctional escape rhythm?

A

Slower than normal

37
Q

A patient has an accelerated junctional rhythm. When you record the ECG, the tracing shows that the P waves follow the QRS complexes and that the distance from each P wave to the next R wave is 0.6 seconds. What is the PR interval?

A

The interval cannot be determined.

38
Q

What is the collective term for the AV node and the surrounding tissue, including the bundle of His?

A

AV junction

39
Q

If the electrical impulse is initiated at the midpoint of the AV junction, where would you expect the P waves to appear on the ECG tracing?

A

Within the QRS complex

40
Q

Reentry dysrhythmias occur as a result of which of the following situations?

A

A blockage or short circuit in the normal electrical conduction pathway

41
Q

How does the preexcitation of the ventricles in reentry dysrhythmias appear on an ECG tracing?

A

delta wave

42
Q

What type of rhythm would be present if abnormal impulses are ignored?

A

Underlying rhythm

43
Q

Which of the following is the best definition of reentry dysrhythmias?

A

Blockage or short circuit of the normal electrical conduction pathway

44
Q

The heart’s own ability to initiate an electrical impulse without being stimulated by another source is known as:

A

automaticity.

45
Q

When the sympathetic branch of the ANS (automatic nervous system) is stimulated, the heart responds by:

A

speeding up

46
Q

What is the heart’s response to stimulation of the vagus nerve?

A

it slows down

47
Q

The function of the bundle branches is to:

A

conduct electrical impulses from the AV bundle to the left and right ventricles.

48
Q

The primary pacemaker of a normal heart, where the electrical impulse for the heartbeat originates, is the:

A

SA node

49
Q

The AV node has several important functions that help the heart work effectively. Which of the following is not a function of the AV node?

A

It causes a loss of atrial kick.

50
Q

The structure that relays an electrical impulse from the SA node to the left atrium in a normal heart is the:

A

Bachmann’s bundle.

51
Q

The structure that transfers an electrical impulse from the atria to the ventricles is the:

A

bundle of His.

52
Q

Electrical impulses are spread throughout the ventricles by the:

A

Purkinje network.

53
Q

QRS duration measurement is essential to determine the time it takes for:

A

ventricular depolarization.

54
Q

The shape of the P wave is analyzed to determine whether:

A

all of the atrial current is moving in the same pathway.

55
Q

The normal PR interval measurement is:

A

0.12 to 0.20 second.

56
Q

The normal range for the QRS complex duration is:

A

0.06 to 0.10 second.

57
Q

Measuring the PR interval requires the ECG technician to measure from the:

A

beginning of the P wave to the beginning of the QRS complex.

58
Q

The P wave represents:

A

atrial depolarization.

59
Q

The ECG analysis consists of __________blank steps, which include evaluation of the following components of the ECG rhythm strips:

A

five; (1) rhythm or regularity, (2) rate, (3) P wave morphology, (4) PR interval, and (5) QRS duration and morphology.

60
Q

Premature junctional complex (PJC) is:

A

a single early electrical impulse that originates in the atrioventricular junction.

61
Q

With junctional escape rhythm, if the P wave is identifiable, the atrial rate will be 40 to 60 beats per minute, and the ventricular rate:

A

will be the same, 40 to 60 beats per minute.

62
Q

With accelerated junctional rhythm, if the P wave is identifiable, the rate will be:

A

60 to 100 beats per minute.

63
Q

The rate for accelerated junctional rhythm is the same as:

A

normal sinus rhythm, so it is unlikely the patient will show signs of low cardiac output.

64
Q

Which of the following dysrhythmias is not considered part of the supraventricular tachycardia classification?

A

Ventricular tachycardia

65
Q

What is the heart rate range for junctional escape rhythm?

A

40–60 beats per minute

66
Q

What is the inherent rate of the Purkinje network?

A

20 to 40 bpm

Ekg (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions