BASIC DYSRHYTHMIAS QUESTIONS
AND UPDATED ANSWERS (BASIC A
DYSRHYTHMIA) RATED 100%
CORRECT
EKG paper is divided into small squares and larger squares - correct answer ✔✔Large squares
are defined by a dark line. They are 5 squares high and 5 squares long (0.20 seconds)
Small squares may be lines or may be dots within the dark lines. They are 0.04 seconds
every mark below EKG grid is 3sec
Artifact - correct answer ✔✔EKG waveforms from sources outside the heart
Interference seen on a monitor or EKG strip
4 causes
Patient movement (i.e. pt. with tremors)
Loose or defective electrodes (fuzzy baseline)
Improper grounding (60 cycle interference)
Faulty EKG apparatus
Normal PR and QRS interval lengths - correct answer ✔✔PR Interval: .12-.20 seconds
QRS Interval: < .12 seconds
Origin of Rhythms - correct answer ✔✔They are named for the structure of the heart where the
foci (a cell sending off an electrical impulse) is located that is producing the abnormal rhythm
, Sinus (Sinus node)
Junctional (Area between the atria & ventricles)
Ventricular (any cell in the ventricles)
Atrial (any cell in the atria)
AV Blocks (AV node blocking some or all of the passage of electricity through it)
Sinus Arrhythmia (SA) - correct answer ✔✔Normal except irregular
The difference between the fastest two heart beats (from 1 QRS to the next QRS) and the
slowest two heart beats is greater than .12 sec
Asystole - correct answer ✔✔No electrical activity
CODE BLUE
but it does arise from the SA node??
Pulseless Electrical Activity (PEA) - correct answer ✔✔Normal rhythm, but...No Pulse*
Electrical activity is present but there is no pulse, so the heart is not beating! Something has
happened to prevent the muscular tissue from responding to the electrical activity
(i.e. ↓↑ K+, hypothermia, Pneumothorax, cardiac tampanode, hypovolemia, drug overdose,
pulmonary or coronary thrombosis)
Rhythms arising from the SA Node - correct answer ✔✔Sinus Rhythm
Sinus Tachycardia
Sinus Bradycardia
Sinus Arrhythmia
Asystole
Pulseless Electrical Activity
AND UPDATED ANSWERS (BASIC A
DYSRHYTHMIA) RATED 100%
CORRECT
EKG paper is divided into small squares and larger squares - correct answer ✔✔Large squares
are defined by a dark line. They are 5 squares high and 5 squares long (0.20 seconds)
Small squares may be lines or may be dots within the dark lines. They are 0.04 seconds
every mark below EKG grid is 3sec
Artifact - correct answer ✔✔EKG waveforms from sources outside the heart
Interference seen on a monitor or EKG strip
4 causes
Patient movement (i.e. pt. with tremors)
Loose or defective electrodes (fuzzy baseline)
Improper grounding (60 cycle interference)
Faulty EKG apparatus
Normal PR and QRS interval lengths - correct answer ✔✔PR Interval: .12-.20 seconds
QRS Interval: < .12 seconds
Origin of Rhythms - correct answer ✔✔They are named for the structure of the heart where the
foci (a cell sending off an electrical impulse) is located that is producing the abnormal rhythm
, Sinus (Sinus node)
Junctional (Area between the atria & ventricles)
Ventricular (any cell in the ventricles)
Atrial (any cell in the atria)
AV Blocks (AV node blocking some or all of the passage of electricity through it)
Sinus Arrhythmia (SA) - correct answer ✔✔Normal except irregular
The difference between the fastest two heart beats (from 1 QRS to the next QRS) and the
slowest two heart beats is greater than .12 sec
Asystole - correct answer ✔✔No electrical activity
CODE BLUE
but it does arise from the SA node??
Pulseless Electrical Activity (PEA) - correct answer ✔✔Normal rhythm, but...No Pulse*
Electrical activity is present but there is no pulse, so the heart is not beating! Something has
happened to prevent the muscular tissue from responding to the electrical activity
(i.e. ↓↑ K+, hypothermia, Pneumothorax, cardiac tampanode, hypovolemia, drug overdose,
pulmonary or coronary thrombosis)
Rhythms arising from the SA Node - correct answer ✔✔Sinus Rhythm
Sinus Tachycardia
Sinus Bradycardia
Sinus Arrhythmia
Asystole
Pulseless Electrical Activity
