©EVERLY 2024/2025 ALL RIGHTS RESERVED.
Basic Dysrhythmia Course Exam Study
Guide.
SA node - Answer✔the major pacemaker of the heart
60-100 - Answer✔inherent rate of the SA node
40-60 - Answer✔inherent rate of the AV node
20-40 - Answer✔inherent rate of the ventricles (purkinjie fibers)
systole - Answer✔phase of contraction
diastole - Answer✔phase of relaxation
p wave - Answer✔what does atrial depolarization show on the ECG?
QRS complex - Answer✔what does ventricle depolarization show on the ECG?
T wave - Answer✔what does repolarization show on the ECG?
increase - Answer✔what does sympathetic stimulation do to the heart rate?
decrease - Answer✔what does parasympathetic stimulation do to the heart rate?
absolute refractory period - Answer✔the period immediately following the firing of a nerve fiber
when it cannot be stimulated no matter how great a stimulus is applied
relative refractory period - Answer✔during the ventricular cardiac cycle when all cardiac cells
are not fully repolarized and a strong enough stimulus can excite cardiac tissue and initiate
arrhythmias
last half of t wave - Answer✔When is the relative refractory period of the ventricles?
.20 secs - Answer✔how much time is one large box in an ecg strip?
.04 secs - Answer✔how much time is one small box in an ecg strip?
0.12-0.20 - Answer✔normal range of PR interval
0.04-0.12 - Answer✔normal range of QRS complex
less than 1/2 the preceding R-R interval - Answer✔what is the normal time of the QT?
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, ©EVERLY 2024/2025 ALL RIGHTS RESERVED.
p to p - Answer✔how do you measure the atrial rate?
R to R - Answer✔how do you measure the ventricular rate?
sinus rhythm - Answer✔
sinus bradycardia - Answer✔
assess pt
atropine
pacing
IV, O2 - Answer✔tx for sinus bradycardia
sinus tachycardia - Answer✔
treat underlying cause (Fever, pain, hypoxia) - Answer✔tx for sinus tachycardia
sinus arrhythmia - Answer✔irregular rhythm that varies with respiration; rate increases with
inspiration and decreases with expiration
Premature Atrial Contraction - Answer✔rhythm with an early P wave, but the next P wave
comes on time
Premature Atrial Contraction (PAC) - Answer✔
continue to monitor
check electrolytes and oxygen
possible betablocker/calcium channel blocker - Answer✔tx for PAC
Atrial Tachycardia - Answer✔atrial Rate: 160-250 beats per minute, reglular rhythm/QRS/
betablockers/calcium channel blocker
cardioversion
adenosine**
vagal manuever - Answer✔tx for atrial tachycardia
atrial flutter - Answer✔
atrial flutter - Answer✔atrial rate of 250-350
"saw tooth pattern"
atrial flutter
complete heart block - Answer✔which rhythms do you HAVE to use the exact rate measurement
card?
2|Page
Basic Dysrhythmia Course Exam Study
Guide.
SA node - Answer✔the major pacemaker of the heart
60-100 - Answer✔inherent rate of the SA node
40-60 - Answer✔inherent rate of the AV node
20-40 - Answer✔inherent rate of the ventricles (purkinjie fibers)
systole - Answer✔phase of contraction
diastole - Answer✔phase of relaxation
p wave - Answer✔what does atrial depolarization show on the ECG?
QRS complex - Answer✔what does ventricle depolarization show on the ECG?
T wave - Answer✔what does repolarization show on the ECG?
increase - Answer✔what does sympathetic stimulation do to the heart rate?
decrease - Answer✔what does parasympathetic stimulation do to the heart rate?
absolute refractory period - Answer✔the period immediately following the firing of a nerve fiber
when it cannot be stimulated no matter how great a stimulus is applied
relative refractory period - Answer✔during the ventricular cardiac cycle when all cardiac cells
are not fully repolarized and a strong enough stimulus can excite cardiac tissue and initiate
arrhythmias
last half of t wave - Answer✔When is the relative refractory period of the ventricles?
.20 secs - Answer✔how much time is one large box in an ecg strip?
.04 secs - Answer✔how much time is one small box in an ecg strip?
0.12-0.20 - Answer✔normal range of PR interval
0.04-0.12 - Answer✔normal range of QRS complex
less than 1/2 the preceding R-R interval - Answer✔what is the normal time of the QT?
1|Page
, ©EVERLY 2024/2025 ALL RIGHTS RESERVED.
p to p - Answer✔how do you measure the atrial rate?
R to R - Answer✔how do you measure the ventricular rate?
sinus rhythm - Answer✔
sinus bradycardia - Answer✔
assess pt
atropine
pacing
IV, O2 - Answer✔tx for sinus bradycardia
sinus tachycardia - Answer✔
treat underlying cause (Fever, pain, hypoxia) - Answer✔tx for sinus tachycardia
sinus arrhythmia - Answer✔irregular rhythm that varies with respiration; rate increases with
inspiration and decreases with expiration
Premature Atrial Contraction - Answer✔rhythm with an early P wave, but the next P wave
comes on time
Premature Atrial Contraction (PAC) - Answer✔
continue to monitor
check electrolytes and oxygen
possible betablocker/calcium channel blocker - Answer✔tx for PAC
Atrial Tachycardia - Answer✔atrial Rate: 160-250 beats per minute, reglular rhythm/QRS/
betablockers/calcium channel blocker
cardioversion
adenosine**
vagal manuever - Answer✔tx for atrial tachycardia
atrial flutter - Answer✔
atrial flutter - Answer✔atrial rate of 250-350
"saw tooth pattern"
atrial flutter
complete heart block - Answer✔which rhythms do you HAVE to use the exact rate measurement
card?
2|Page
