BASIC ARRHYTHMIA Sentara Test Questions and Answers
Graded A+
5 steps to EKG Interpretation - -1) Look for wave: Upright, uniform, round, before each QRS
P waves PRI: 0.12 - 0.20 seconds QRS: 0.06 - 0.12
If present are they uniform and upright? seconds
Does every P wave have a QRS? Rhythm: Regular Rate: 60-100
2) Measure PR Interval (PRI)
3) Measure QRS
QT interval is important to measure as many What indicates that the electrical impulse is
medications can affect its' duration, however, this generated by the sinus node and is following the
does not alter the interpretation. normal conduction pathway through the atria? -
4) Identify Rhythm as regular or irregular -Rounded upright P waves
5) Count Rate
Sinus Bradycardia Interpretation - -P wave:
PR interval length - -0.12 - 0.20 seconds Upright, uniform, rounded, before each QRS PRI:
0.12 - 0.20 seconds QRS: 0.06 - 0.12 seconds
Rhythm: Regular Rate: Less than 60
QRS Interval length - -0.06 - 0.12 seconds
Sinus Tachycardia Interpretation - -P wave:
QT Interval length - -0.32 - 0.44 seconds Upright, uniform, round, before each QRS PRI:
0.12 - 0.20 seconds QRS: 0.06 - 0.12 seconds
Rhythm: Regular Rate: 101-150
Length of small squares on EKG - -0.04
seconds
Sinus Arrhythmia Interpretation - -P wave:
Upright, uniform, before each QRS PRI: 0.12 -
Length of regular squares on EKG - -0.2 0.20 seconds QRS: 0.06 - 0.12 seconds Rhythm:
seconds Irregular (regularly irregular) Rate: 60 -100
P wave represents - -atrial depolarization Sinus Arrest Interpretation - -P wave:
(contraction) Upright, uniform, before each QRS PRI: 0.12 -
0.20 seconds QRS: 0.06 - 0.12 seconds Rhythm:
Regular R to R in Sinus Rhythm; R to R
irregularity across pause Rate: Usually 60 -100
QRS represents - -ventricular
but could be bradycardic rate
depolarization (contraction)
How do you calculate length of pause (in time) for
QTI represents - -Inherent Rate of
sinus arrest? - -by counting the number of
Purkinjie fibers
small boxes between the two R waves that come
right before and right after the pause and
multiplying by 0.04 seconds.
Normal Sinus Rhythm Interpretation - -P
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Graded A+
5 steps to EKG Interpretation - -1) Look for wave: Upright, uniform, round, before each QRS
P waves PRI: 0.12 - 0.20 seconds QRS: 0.06 - 0.12
If present are they uniform and upright? seconds
Does every P wave have a QRS? Rhythm: Regular Rate: 60-100
2) Measure PR Interval (PRI)
3) Measure QRS
QT interval is important to measure as many What indicates that the electrical impulse is
medications can affect its' duration, however, this generated by the sinus node and is following the
does not alter the interpretation. normal conduction pathway through the atria? -
4) Identify Rhythm as regular or irregular -Rounded upright P waves
5) Count Rate
Sinus Bradycardia Interpretation - -P wave:
PR interval length - -0.12 - 0.20 seconds Upright, uniform, rounded, before each QRS PRI:
0.12 - 0.20 seconds QRS: 0.06 - 0.12 seconds
Rhythm: Regular Rate: Less than 60
QRS Interval length - -0.06 - 0.12 seconds
Sinus Tachycardia Interpretation - -P wave:
QT Interval length - -0.32 - 0.44 seconds Upright, uniform, round, before each QRS PRI:
0.12 - 0.20 seconds QRS: 0.06 - 0.12 seconds
Rhythm: Regular Rate: 101-150
Length of small squares on EKG - -0.04
seconds
Sinus Arrhythmia Interpretation - -P wave:
Upright, uniform, before each QRS PRI: 0.12 -
Length of regular squares on EKG - -0.2 0.20 seconds QRS: 0.06 - 0.12 seconds Rhythm:
seconds Irregular (regularly irregular) Rate: 60 -100
P wave represents - -atrial depolarization Sinus Arrest Interpretation - -P wave:
(contraction) Upright, uniform, before each QRS PRI: 0.12 -
0.20 seconds QRS: 0.06 - 0.12 seconds Rhythm:
Regular R to R in Sinus Rhythm; R to R
irregularity across pause Rate: Usually 60 -100
QRS represents - -ventricular
but could be bradycardic rate
depolarization (contraction)
How do you calculate length of pause (in time) for
QTI represents - -Inherent Rate of
sinus arrest? - -by counting the number of
Purkinjie fibers
small boxes between the two R waves that come
right before and right after the pause and
multiplying by 0.04 seconds.
Normal Sinus Rhythm Interpretation - -P
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