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APEX EKG Test Exam Questions And
Answers |Latest 2025 | Guaranteed Pass
Sinus Bradycardia - Answer✔Regularity: atrial and ventricular rate are regular
Rate: < 60 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Tachycardia - Answer✔Regularity: atrial and ventricular rate are regular
Rate: >100 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Arrhythmia - Answer✔Regularity: atrial and ventricular rate are the same but the rhythm
will be slightly irregular
Rate: variable, can be bradycardia to normal
P wave: upright, smooth, round and uniform shape, one for every QRS complex
1
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PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Arrest and Sinus Pause - Answer✔Regularity: Regular but interrupted (by a pause)
Rate: can occur at any heart rate
P wave: normal sinus P waves before the pause
PRI: 0.12 to 0.20 seconds before the pause, may be shorter or absent after the pause
QRS: 0.06 to 0.10 seconds on the sinus beats, on the escape beats the QRS may be narrow or
wide depending on which pacemaker of the heart resumes after the pause
QTI: 0.36 to 0.46 seconds for the sinus beats
Premature Atrial Contractions
PACs - Answer✔Regularity: underlying atrial rate is regular except for early beat, ventricular
rate is regular
Rate: determined by the underlying rhythm
P wave: upright, smooth, round and uniform shape, EXCEPT for the premature beat, it will
shaped differently
PRI : 0.12 to 0.20 seconds except for early beat
QRS: 0.06 to 0.10 seconds and all are uniform
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Other: because the electrical stimulus is originating somewhere in the atria (but NOT the SA
node) it affects the P wave formation
Atrial Fibrillation - Answer✔Regularity: atrial and ventricular rate irregularly irregular
Rate:
2
APEX EKG Test Exam Questions And
Answers |Latest 2025 | Guaranteed Pass
Sinus Bradycardia - Answer✔Regularity: atrial and ventricular rate are regular
Rate: < 60 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Tachycardia - Answer✔Regularity: atrial and ventricular rate are regular
Rate: >100 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Arrhythmia - Answer✔Regularity: atrial and ventricular rate are the same but the rhythm
will be slightly irregular
Rate: variable, can be bradycardia to normal
P wave: upright, smooth, round and uniform shape, one for every QRS complex
1
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PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Arrest and Sinus Pause - Answer✔Regularity: Regular but interrupted (by a pause)
Rate: can occur at any heart rate
P wave: normal sinus P waves before the pause
PRI: 0.12 to 0.20 seconds before the pause, may be shorter or absent after the pause
QRS: 0.06 to 0.10 seconds on the sinus beats, on the escape beats the QRS may be narrow or
wide depending on which pacemaker of the heart resumes after the pause
QTI: 0.36 to 0.46 seconds for the sinus beats
Premature Atrial Contractions
PACs - Answer✔Regularity: underlying atrial rate is regular except for early beat, ventricular
rate is regular
Rate: determined by the underlying rhythm
P wave: upright, smooth, round and uniform shape, EXCEPT for the premature beat, it will
shaped differently
PRI : 0.12 to 0.20 seconds except for early beat
QRS: 0.06 to 0.10 seconds and all are uniform
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Other: because the electrical stimulus is originating somewhere in the atria (but NOT the SA
node) it affects the P wave formation
Atrial Fibrillation - Answer✔Regularity: atrial and ventricular rate irregularly irregular
Rate:
2
