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Basic Dysrhythmia Course
Exam
Questions and Correct
Answers
SA node - Correct Answer: the major pacemaker of the heart
60-100 - Correct Answer: inherent rate of the SA node
40-60 - Correct Answer: inherent rate of the AV node
20-40 - Correct Answer: inherent rate of the ventricles (purkinjie fibers)
systole - Correct Answer: phase of contraction
diastole - Correct Answer: phase of relaxation
p wave - Correct Answer: what does atrial depolarization show on the ECG?
QRS complex - Correct Answer: what does ventricle depolarization show on the
ECG?
T wave - Correct Answer: what does repolarization show on the ECG?
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, …
increase - Correct Answer: what does sympathetic stimulation do to the
heart rate? decrease - Correct Answer: what does parasympathetic
stimulation do to the heart rate?
absolute refractory period - Correct 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 - Correct 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 - Correct Answer: When is the relative refractory period of the
ventricles?
.20 secs - Correct Answer: how much time is one large box in an ecg strip?
.04 secs - Correct Answer: how much time is one small box in an ecg strip?
0.12-0.20 - Correct Answer: normal range of PR
interval 0.04-0.12 - Correct Answer: normal range of
QRS complex
less than 1/2 the preceding R-R interval - Correct Answer: what is the
normal time of the QT? p to p - Correct Answer: how do you measure the
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Basic Dysrhythmia Course
Exam
Questions and Correct
Answers
SA node - Correct Answer: the major pacemaker of the heart
60-100 - Correct Answer: inherent rate of the SA node
40-60 - Correct Answer: inherent rate of the AV node
20-40 - Correct Answer: inherent rate of the ventricles (purkinjie fibers)
systole - Correct Answer: phase of contraction
diastole - Correct Answer: phase of relaxation
p wave - Correct Answer: what does atrial depolarization show on the ECG?
QRS complex - Correct Answer: what does ventricle depolarization show on the
ECG?
T wave - Correct Answer: what does repolarization show on the ECG?
xxx
, …
increase - Correct Answer: what does sympathetic stimulation do to the
heart rate? decrease - Correct Answer: what does parasympathetic
stimulation do to the heart rate?
absolute refractory period - Correct 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 - Correct 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 - Correct Answer: When is the relative refractory period of the
ventricles?
.20 secs - Correct Answer: how much time is one large box in an ecg strip?
.04 secs - Correct Answer: how much time is one small box in an ecg strip?
0.12-0.20 - Correct Answer: normal range of PR
interval 0.04-0.12 - Correct Answer: normal range of
QRS complex
less than 1/2 the preceding R-R interval - Correct Answer: what is the
normal time of the QT? p to p - Correct Answer: how do you measure the
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