Relias Dysrhythmia Basic A Latest Update 2026 | Exam
Prep
1. Characteristics of premature ventricular complexes include that they:
Have normal PR intervals
Are followed by a non-compensatory pause
Are preceded by an inverted P wave
Have a wide and bizarre QRS complex
2. In a clinical scenario, if a patient presents with a heart rate of 75 beats per
minute and shows characteristics of accelerated idioventricular rhythm, what
implications does this have for their cardiac function?
The heart is functioning with a rate within the normal range for
accelerated idioventricular rhythm, indicating potential underlying
issues but stable cardiac output.
The heart rate is irregular, suggesting a severe arrhythmia that needs
immediate attention.
The heart rate is too high, suggesting tachycardia and immediate
intervention is needed.
The heart rate is too low, indicating bradycardia and requiring urgent
treatment.
3. 3 PVCs in succession is known as a and is a big *red flag*.
trigeminy
unifocal PVC
triplet
multifocal PVC
,4. If a patient has a prolonged QT Interval, what potential complication should
be monitored?
Increased heart rate
Heart valve dysfunction
Risk of Torsades de Pointes
Decreased blood pressure
5. Describe the significance of the firing rate in idioventricular rhythms
compared to normal sinus rhythm.
The firing rate in idioventricular rhythms is variable and does not
relate to cardiac output.
The firing rate in idioventricular rhythms is significantly lower than
that of normal sinus rhythm, indicating a potential compromise in
cardiac output.
The firing rate in idioventricular rhythms is the same as normal sinus
rhythm, showing no concern.
The firing rate in idioventricular rhythms is higher than normal sinus
rhythm, suggesting increased cardiac efficiency.
6. What is the typical duration range for a normal QRS complex in seconds?
0.06 to 0.10 seconds
0.12 to 0.15 seconds
0.10 to 0.12 seconds
0.02 to 0.04 seconds
,7. Describe the role of the AV Node when the SA Node is not functioning
properly.
The AV Node stops all electrical activity in the heart.
The AV Node increases the heart rate to 100 beats per minute.
The AV Node only transmits impulses from the atria to the ventricles
without generating its own.
The AV Node acts as a secondary pacemaker, generating impulses
at a rate of 40 to 60 beats per minute.
8. If the Bundle of His is damaged and cannot conduct impulses effectively,
what would be the likely consequence on heart rhythm?
The heart will beat faster than normal.
The heart will have an increased P wave duration.
The heart may experience a complete heart block.
The heart will have a normal rhythm.
9. When interpreting an ECG strip, what is the value of the smallest box?
0.2 seconds
0.04 seconds
3 seconds
0.12 seconds
10. If a patient presents with a QRS duration of 0.14 seconds, what might this
indicate about their cardiac condition?
Increased heart rate
Possible bundle branch block or other conduction delay
, Normal ventricular depolarization
Atrial fibrillation
11. If a patient presents with a heart rate of 60 bpm, a prolonged PR interval, and
normal QRS duration, what type of AV block might they be experiencing?
2nd degree AV block
3rd degree AV block
Normal sinus rhythm
1st degree AV block
12. Describe the significance of the PR Interval in cardiac rhythms.
The PR Interval is used to assess the presence of P waves in the ECG.
The PR Interval indicates the heart rate during tachycardia.
The PR Interval reflects the time it takes for electrical impulses to
travel from the atria to the ventricles, indicating proper conduction
through the AV node.
The PR Interval measures the duration of ventricular depolarization.
13. In a patient with a known pacemaker, if spikes are observed on the ECG
without accompanying QRS complexes, what clinical action should be
taken?
Monitor the patient for signs of bradycardia only.
Ignore the spikes if the patient is asymptomatic.
Increase the patient's heart rate with medication.
Evaluate the pacemaker function and assess for potential
malfunction.
Prep
1. Characteristics of premature ventricular complexes include that they:
Have normal PR intervals
Are followed by a non-compensatory pause
Are preceded by an inverted P wave
Have a wide and bizarre QRS complex
2. In a clinical scenario, if a patient presents with a heart rate of 75 beats per
minute and shows characteristics of accelerated idioventricular rhythm, what
implications does this have for their cardiac function?
The heart is functioning with a rate within the normal range for
accelerated idioventricular rhythm, indicating potential underlying
issues but stable cardiac output.
The heart rate is irregular, suggesting a severe arrhythmia that needs
immediate attention.
The heart rate is too high, suggesting tachycardia and immediate
intervention is needed.
The heart rate is too low, indicating bradycardia and requiring urgent
treatment.
3. 3 PVCs in succession is known as a and is a big *red flag*.
trigeminy
unifocal PVC
triplet
multifocal PVC
,4. If a patient has a prolonged QT Interval, what potential complication should
be monitored?
Increased heart rate
Heart valve dysfunction
Risk of Torsades de Pointes
Decreased blood pressure
5. Describe the significance of the firing rate in idioventricular rhythms
compared to normal sinus rhythm.
The firing rate in idioventricular rhythms is variable and does not
relate to cardiac output.
The firing rate in idioventricular rhythms is significantly lower than
that of normal sinus rhythm, indicating a potential compromise in
cardiac output.
The firing rate in idioventricular rhythms is the same as normal sinus
rhythm, showing no concern.
The firing rate in idioventricular rhythms is higher than normal sinus
rhythm, suggesting increased cardiac efficiency.
6. What is the typical duration range for a normal QRS complex in seconds?
0.06 to 0.10 seconds
0.12 to 0.15 seconds
0.10 to 0.12 seconds
0.02 to 0.04 seconds
,7. Describe the role of the AV Node when the SA Node is not functioning
properly.
The AV Node stops all electrical activity in the heart.
The AV Node increases the heart rate to 100 beats per minute.
The AV Node only transmits impulses from the atria to the ventricles
without generating its own.
The AV Node acts as a secondary pacemaker, generating impulses
at a rate of 40 to 60 beats per minute.
8. If the Bundle of His is damaged and cannot conduct impulses effectively,
what would be the likely consequence on heart rhythm?
The heart will beat faster than normal.
The heart will have an increased P wave duration.
The heart may experience a complete heart block.
The heart will have a normal rhythm.
9. When interpreting an ECG strip, what is the value of the smallest box?
0.2 seconds
0.04 seconds
3 seconds
0.12 seconds
10. If a patient presents with a QRS duration of 0.14 seconds, what might this
indicate about their cardiac condition?
Increased heart rate
Possible bundle branch block or other conduction delay
, Normal ventricular depolarization
Atrial fibrillation
11. If a patient presents with a heart rate of 60 bpm, a prolonged PR interval, and
normal QRS duration, what type of AV block might they be experiencing?
2nd degree AV block
3rd degree AV block
Normal sinus rhythm
1st degree AV block
12. Describe the significance of the PR Interval in cardiac rhythms.
The PR Interval is used to assess the presence of P waves in the ECG.
The PR Interval indicates the heart rate during tachycardia.
The PR Interval reflects the time it takes for electrical impulses to
travel from the atria to the ventricles, indicating proper conduction
through the AV node.
The PR Interval measures the duration of ventricular depolarization.
13. In a patient with a known pacemaker, if spikes are observed on the ECG
without accompanying QRS complexes, what clinical action should be
taken?
Monitor the patient for signs of bradycardia only.
Ignore the spikes if the patient is asymptomatic.
Increase the patient's heart rate with medication.
Evaluate the pacemaker function and assess for potential
malfunction.
