BASIC ARRHYTHMIA Sentara Test Questions
and Answers Graded A+
Question 1
3rd Degree Heart Block (Complete Heart Block) Interpretation:
Correct Answer
P wave: Normal P waves PRI: Completely inconsistent. There is NO relationship
between atrial & ventricular complexes QRS: Bundle of HIS escape mechanism:
Normal 0.06 - 0.12 seconds Ventricular escape mechanism: Prolonged > 0.12
seconds Rhythm: P to P interval is regular; R to R interval is regular Rate: 40-60 if
Bundle of His escape rhythm < 40 if Ventricular escape rhythm
Question 2
Sinus Bradycardia Interpretation
Correct Answer
P wave: Upright, uniform, rounded, before each QRS PRI: 0.12 - 0.20 seconds QRS:
0.06 - 0.12 seconds
Rhythm: Regular Rate: Less than 60
Question 3
2nd Degree HB Type II (Mobitz II) Interpretation
Correct Answer
P wave: Normal P waves, more P waves than QRS complexes PRI: Always constant,
may be prolonged > 0.20 seconds QRS: Normal 0.06 - 0.12 seconds Rhythm: R to R
interval regular or irregular Rate: May be normal 60 - 100 or bradycardic < 60
Page 1 of 69
,Question 4
Length of regular squares on EKG
Correct Answer
0.2 seconds
Question 5
Junctional Tachycardia Interpretation
Correct Answer
P wave: If seen, will be inverted; may be before or after the QRS; may be hidden in
QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 101-150 beats per minute
Question 6
Ventricular Fibrillation Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Absent with ventricles fibrillating or quivering
Rhythm: Not measurable Rate: Not measurable
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,Question 7
Pulseless Electrical Activity (PEA) Interpretation
Correct Answer
P wave: May be present or absent PRI: May be normal or unmeasurable QRS: May
be normal or abnormal Rhythm: May be regular or irregular Rate: slow, normal, fast
Question 8
Junctional Escape Rhythm Interpretation
Correct Answer
P wave: If seen, will be inverted; may be before or after the QRS, or may be hidden
in QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs, the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 40 - 60 beats per minute
Question 9
First Degree AV Block Interpretation
Correct Answer
P wave: Uniform, upright and 1 "p" for every QRS (1:1) PRI: Prolonged > 0.20
seconds and always constant QRS: Normal 0.06 - 0.12 seconds Rhythm: Regular
Rate: Usually normal 60 - 100
Question 10
Second Degree HB Type I (Mobitz I or Wenckebach) Interpretation
Correct Answer
P wave: Normal sinus P waves, more P waves than QRS complexes PRI: Progressively
lengthening until one QRS is dropped QRS: Normal 0.06 - 0.12 seconds Rhythm:
Grouped beats - irregular R to R intervals Rate: May be normal 60 - 100 or
bradycardic < 60
Question 11
Asystole Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Absent Rhythm: Absent Rate: None
Page 3 of 69
, Question 12
Premature Junctional Contraction (PJC) Interpretation
Correct Answer
P wave: May be inverted, occur before or after the QRS, or may be embedded and
hidden in the QRS complex. PRI: Not measurable in premature beat unless P wave
precedes QRS. If this occurs the PRI will be <0.12 seconds QRS: 0.06 - 0.12 seconds
if impulse travels through ventricle in a normal manner. Rhythm: Regular except
premature beat; underlying rhythm is undisturbed. Rate: Overall heart rate depends
on underlying rhythm
Question 13
Torsades de Pointes Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Wide and bizarre with changing amplitude &
deflection with twisting around the isoelectric line. Rhythm: Irregular Rate: 160-250
Question 14
Atrial Fibrillation Interpretation
Correct Answer
P wave: None PRI: Not measurable QRS: 0.06 - 0.12 seconds Rhythm: Irregular Rate:
"Controlled" - HR < 100 "Uncontrolled" - HR > 100
Question 15
Accelerated Junctional Rhythm Interpretation
Correct Answer
P wave: If seen will be inverted; may be before or after the QRS; may be hidden in
QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 61-100 beats per minute
Page 4 of 69
and Answers Graded A+
Question 1
3rd Degree Heart Block (Complete Heart Block) Interpretation:
Correct Answer
P wave: Normal P waves PRI: Completely inconsistent. There is NO relationship
between atrial & ventricular complexes QRS: Bundle of HIS escape mechanism:
Normal 0.06 - 0.12 seconds Ventricular escape mechanism: Prolonged > 0.12
seconds Rhythm: P to P interval is regular; R to R interval is regular Rate: 40-60 if
Bundle of His escape rhythm < 40 if Ventricular escape rhythm
Question 2
Sinus Bradycardia Interpretation
Correct Answer
P wave: Upright, uniform, rounded, before each QRS PRI: 0.12 - 0.20 seconds QRS:
0.06 - 0.12 seconds
Rhythm: Regular Rate: Less than 60
Question 3
2nd Degree HB Type II (Mobitz II) Interpretation
Correct Answer
P wave: Normal P waves, more P waves than QRS complexes PRI: Always constant,
may be prolonged > 0.20 seconds QRS: Normal 0.06 - 0.12 seconds Rhythm: R to R
interval regular or irregular Rate: May be normal 60 - 100 or bradycardic < 60
Page 1 of 69
,Question 4
Length of regular squares on EKG
Correct Answer
0.2 seconds
Question 5
Junctional Tachycardia Interpretation
Correct Answer
P wave: If seen, will be inverted; may be before or after the QRS; may be hidden in
QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 101-150 beats per minute
Question 6
Ventricular Fibrillation Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Absent with ventricles fibrillating or quivering
Rhythm: Not measurable Rate: Not measurable
Page 2 of 69
,Question 7
Pulseless Electrical Activity (PEA) Interpretation
Correct Answer
P wave: May be present or absent PRI: May be normal or unmeasurable QRS: May
be normal or abnormal Rhythm: May be regular or irregular Rate: slow, normal, fast
Question 8
Junctional Escape Rhythm Interpretation
Correct Answer
P wave: If seen, will be inverted; may be before or after the QRS, or may be hidden
in QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs, the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 40 - 60 beats per minute
Question 9
First Degree AV Block Interpretation
Correct Answer
P wave: Uniform, upright and 1 "p" for every QRS (1:1) PRI: Prolonged > 0.20
seconds and always constant QRS: Normal 0.06 - 0.12 seconds Rhythm: Regular
Rate: Usually normal 60 - 100
Question 10
Second Degree HB Type I (Mobitz I or Wenckebach) Interpretation
Correct Answer
P wave: Normal sinus P waves, more P waves than QRS complexes PRI: Progressively
lengthening until one QRS is dropped QRS: Normal 0.06 - 0.12 seconds Rhythm:
Grouped beats - irregular R to R intervals Rate: May be normal 60 - 100 or
bradycardic < 60
Question 11
Asystole Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Absent Rhythm: Absent Rate: None
Page 3 of 69
, Question 12
Premature Junctional Contraction (PJC) Interpretation
Correct Answer
P wave: May be inverted, occur before or after the QRS, or may be embedded and
hidden in the QRS complex. PRI: Not measurable in premature beat unless P wave
precedes QRS. If this occurs the PRI will be <0.12 seconds QRS: 0.06 - 0.12 seconds
if impulse travels through ventricle in a normal manner. Rhythm: Regular except
premature beat; underlying rhythm is undisturbed. Rate: Overall heart rate depends
on underlying rhythm
Question 13
Torsades de Pointes Interpretation
Correct Answer
P wave: Absent PRI: Absent QRS: Wide and bizarre with changing amplitude &
deflection with twisting around the isoelectric line. Rhythm: Irregular Rate: 160-250
Question 14
Atrial Fibrillation Interpretation
Correct Answer
P wave: None PRI: Not measurable QRS: 0.06 - 0.12 seconds Rhythm: Irregular Rate:
"Controlled" - HR < 100 "Uncontrolled" - HR > 100
Question 15
Accelerated Junctional Rhythm Interpretation
Correct Answer
P wave: If seen will be inverted; may be before or after the QRS; may be hidden in
QRS complex PRI: Not measurable unless P wave precedes QRS. If this occurs the
PRI will be < 0.12 seconds QRS: 0.06 - 0.12 seconds if impulse travels through the
ventricle in a normal manner Rhythm: Regular Rate: 61-100 beats per minute
Page 4 of 69
