Question 1

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

Accepted Answer

A)  20 to 40 bpm
B)  40 to 60 bpm
C)  60 to 100 bpm
D)  100 to 150 bpmE) A) and D)
F) B) and C)

Question 2

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?

Accepted Answer

A)  Before the QRS complex
B)  After the QRS complex
C)  Within the QRS complex
D)  P waves are absent entirelyE) A) and D)
F) B) and C)

Question 3

Which of the following originates from the AV junction?

Accepted Answer

A)  Atrial flutter
B)  Premature atrial complex
C)  Junctional escape rhythm
D)  Sinus bradycardiaE) None of the above
F) A) and D)

Question 4

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

Accepted Answer

A)  The heart rate is the same as normal sinus rhythm.
B)  The heart rate is influenced by the respiratory cycle and variations of vagal tone.
C)  The rhythm originates at the AV junctional tissue, producing retrograde depolarization of atrial tissue.
D)  The heart rate is slower than normal and loses the atrial kick.E) A) and C)
F) B) and D) A

Question 5

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?

Accepted Answer

A)  Hypoxia
B)  Hyperventilation
C)  Hypotension
D)  HypertensionE) All of the above
F) None of the above

Question 6

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

Accepted Answer

A)  A wide QRS complex
B)  Heart rate between 150 and 250 bpm
C)  Identical atrial and ventricular rates
D)  A clear, easily identifiable P waveE) A) and B)
F) A) and C)

Question 7

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

Accepted Answer

A)  Abnormal slowing of conduction through the bundle of His
B)  Blockage or short circuit of the normal electrical conduction pathway
C)  Ischemia around the SA node
D)  Ectopic impulses originating in the Purkinje networkE) A) and D)
F) A) and C)

Question 8

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?

Accepted Answer

A)  Junctional tachycardia
B)  SVT
C)  PJC
D)  Junctional escape rhythmE) A) and B)
F) All of the above

Question 9

Which dysrhythmia does not have a consistent PR interval that measures less than 0.12 seconds?

Accepted Answer

A)  Junctional escape rhythm
B)  Accelerated junctional rhythm
C)  Supraventricular tachycardia
D)  Junctional tachycardiaE) A) and C)
F) A) and B)

Question 10

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

Accepted Answer

A)  Hypertension, lung congestion, and syncope
B)  Hypotension, confusion, and disorientation
C)  Chest pain, lung congestion, and palpitations
D)  Hypotension, nausea, and syncopeE) None of the above
F) C) and D)

Question 11

In junctional rhythms, where does the electrical current initiate?

Accepted Answer

A)  AV junction
B)  Bundle of His
C)  Atria
D)  VentriclesE) B) and D)
F) B) and C)

Question 12

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

Accepted Answer

A)  The force of the ventricular contractions
B)  The rate of the rhythm
C)  The timing of the atrial contractions
D)  The atrial kickE) None of the above
F) All of the above

Question 13

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

Accepted Answer

A)  Purkinje fibers
B)  Ventricles
C)  Bundle of His
D)  SA nodeE) All of the above
F) A) and B) D

Question 14

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

Accepted Answer

A)  Hypertension, rapid pulse
B)  Chest pain, lung congestion
C)  Pale skin, rapid breathing
D)  Hypotension, irregular pulseE) B) and D)
F) C) and D)

Question 15

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

Accepted Answer

A)  Junctional escape rhythm
B)  Heart block rhythm
C)  Asystole
D)  Normal sinus rhythmE) A) and C)
F) B) and D)

Question 16

What are the distinguishing characteristics of junctional escape rhythm?

Accepted Answer

A)  The rhythm is regular; the P wave may occur before, during, or after the QRS; and the P wave is inverted.
B)  The rhythm is irregular, the P wave is inverted, and the P wave may immediately precede or follow the QRS complex.
C)  The P wave may occur simultaneously with the T wave or may occur before, during, or after the QRS complex.
D)  The P waves cannot be identified, there is chaotic electrical activity, and f waves may be seen.E) A) and B)
F) B) and D) A

Question 17

What is the underlying rhythm in the ECG tracing shown here?

Accepted Answer

A)  Normal sinus rhythm
B)  Accelerated junctional rhythm
C)  Junctional tachycardia
D)  SVTE) B) and D)
F) A) and C)

Question 18

What is the origination point of an SVT?

Accepted Answer

A)  Left ventricle
B)  Atria or junctional region
C)  Purkinje fibers
D)  Right ventricleE) All of the above
F) B) and D)

Question 19

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

Accepted Answer

A)  20 to 40 bpm
B)  40 to 60 bpm
C)  80 to 100 bpm
D)  100 to 150 bpmE) A) and C)
F) A) and B)

Question 20

Identify the following rhythm:

Accepted Answer

A)  Atrial fibrillation
B)  Atrial flutter
C)  Junctional tachycardia
D)  SVTE) None of the above
F) All of the above

Exam 7: Junctional Dysrhythmias

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Which of the following originates from the AV junction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Which dysrhythmia does not have a consistent PR interval that measures less than 0.12 seconds?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In junctional rhythms, where does the electrical current initiate?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What are the distinguishing characteristics of junctional escape rhythm?

Correct AnswerverifiedA

What is the underlying rhythm in the ECG tracing shown here?

Correct AnswerverifiedShow Answer

What is the origination point of an SVT?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Identify the following rhythm:

Correct AnswerverifiedShow Answer

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