ECG Final Exam UPDATED ACTUAL
Questions and CORRECT Answers
The _______ supplies the RA and RV with blood - CORRECT ANSWER - Right coronary
artery
Stimulation of the parasympathetic nerve fibers typically results in what action? - CORRECT
ANSWER - Slowed conduction through the AV node
The contribution of blood that is added to the ventricles and results from atrial contraction is
called: - CORRECT ANSWER - Atrial kick
Which of the following are semilunar valves? - CORRECT ANSWER - Aortic and
pulmonic
The left main coronary artery divides into the ____ and ____ - CORRECT ANSWER -
LAD and circumflex
______ cells are specialized cells of the electrical system responsible for the spontaneous
generation and conduction of electrical impulses - CORRECT ANSWER - Pacemaker
cells
When does the absolute refractory period occur? - CORRECT ANSWER - Begins with the
onset of the QRS complex and terminates at approx. the apex of the T wave
Which of the following statements is true regarding the QT interval? - CORRECT
ANSWER - The QT interval represents the time from initial depolarization of the
ventricles to the end of ventricular repolarization
How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular? -
CORRECT ANSWER - Compare the P to P intervals
,Which of the following ECG leads use two distinct electrodes, one of which is positive and the
other negative? - CORRECT ANSWER - Leads I, II, III
In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with _______ -
CORRECT ANSWER - expiration
1) SA block is a disorder of impulse _______;
2) Sinus arrest is a disorder of impulse ________ - CORRECT ANSWER - 1) conduction
2) formation
Signs and symptoms experienced during tachycardia are usually primarily related to: -
CORRECT ANSWER - Decreased ventricular filling time and stroke volume
Which of the following correctly reflects examples of ectopic pacemakers? - CORRECT
ANSWER - the AV junction and ventricles
A wandering atrial pacemaker rhythm with a ventricular rate of 60-100 bpm may also be referred
to as ______ - CORRECT ANSWER - Multiformed atrial tachycardia
The most common type of ventricular tachycardia is ______ - CORRECT ANSWER -
AVNRT
What is meant by the term "uncontrolled atrial fibrillation"? - CORRECT ANSWER - The
overall ventricular rate is greater than 100 bpm
If the onset or end of paroxysmal atrial tachycardia or paroxysmal supraventricular tachycardia is
not observed on the ECG, the dysrhythmia is called: - CORRECT ANSWER -
Supraventricular tachycardia
,What is the most common sustained dysrhythmia in adults - CORRECT ANSWER - Atrial
fibrillation
What is the difference between a PAC and a PJC? - CORRECT ANSWER - a PAC will
have a P wave before the QRS complex, whereas a PJC may/may not have a P wave before.
Wolf Parkinson syndrome is associated with a short PR interval, delta wave, and wide QRS
complex. T or F? - CORRECT ANSWER - True
Which of the following ECG characteristics distinguishes atrial flutter from other atrial
dysrhythmias? - CORRECT ANSWER - The saw tooth picket fence appearance of the
wave forms
When a junctional rhythm is viewed in lead II, where is the location of the P wave on the ECG if
atrial and ventricular depolarization occur simultaneously? - CORRECT ANSWER -
Within the QRS complex
What is the usual rate of nonparoxysmal junctional tachycardia? - CORRECT ANSWER -
101-140 bpm
Depending on the severity of the patients symptoms, management of slow rhythms may require
therapeutic intervention including _________ - CORRECT ANSWER - administration of
atropine
The term for three or more PVCs that occur at a rate of 100 or more beats per minute is called
_______ - CORRECT ANSWER - A run of ventricular tachycardia
PVC's that look alike in the same lead and begin from the same anatomic site are called ______
PVC's - CORRECT ANSWER - Uniform
, What kind of dysrhythmia has QRS complexes that vary in shape and amplitude from beat to
beat and appear to twist from upright to negative and upright and back, resembling a spindle? -
CORRECT ANSWER - Polymorphic ventricular tachycardia
When a delay or interruption in impulse conduction from the atria to the ventricles occurs as a
result of a transient or permanent anatomic or functional impairment, the resulting dysrhythmia
is called _______ - CORRECT ANSWER - AV block
If you see RsR in lead V1, what kind of block is it? - CORRECT ANSWER - Right BBB
The PR interval of a first degree AV block is: - CORRECT ANSWER - Constant and more
than 0.20 sec in duration
Which of the blocks is a complete block? - CORRECT ANSWER - 3rd degree block
Which of the following is true regarding a 2:1 AV block? - CORRECT ANSWER - 1) the
atrial rhythm is irregular
2) the PR is constant****
3) the ventricular rate is 2X the atrial rate
4) the level of the block is located within the SA node
The terms advanced or high grade second degree AV block may be used to describe one or more
consecutive P waves that are not conducted. - CORRECT ANSWER - False (3+ waves are
not conducted)
Which lead is best to use to differentiate between a right and left bundle branch block? -
CORRECT ANSWER - V1
The term capture refers to: - CORRECT ANSWER - the successful conduction of an
artificial pacemakers impulse through the myocardium, resulting in depolarization
Questions and CORRECT Answers
The _______ supplies the RA and RV with blood - CORRECT ANSWER - Right coronary
artery
Stimulation of the parasympathetic nerve fibers typically results in what action? - CORRECT
ANSWER - Slowed conduction through the AV node
The contribution of blood that is added to the ventricles and results from atrial contraction is
called: - CORRECT ANSWER - Atrial kick
Which of the following are semilunar valves? - CORRECT ANSWER - Aortic and
pulmonic
The left main coronary artery divides into the ____ and ____ - CORRECT ANSWER -
LAD and circumflex
______ cells are specialized cells of the electrical system responsible for the spontaneous
generation and conduction of electrical impulses - CORRECT ANSWER - Pacemaker
cells
When does the absolute refractory period occur? - CORRECT ANSWER - Begins with the
onset of the QRS complex and terminates at approx. the apex of the T wave
Which of the following statements is true regarding the QT interval? - CORRECT
ANSWER - The QT interval represents the time from initial depolarization of the
ventricles to the end of ventricular repolarization
How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular? -
CORRECT ANSWER - Compare the P to P intervals
,Which of the following ECG leads use two distinct electrodes, one of which is positive and the
other negative? - CORRECT ANSWER - Leads I, II, III
In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with _______ -
CORRECT ANSWER - expiration
1) SA block is a disorder of impulse _______;
2) Sinus arrest is a disorder of impulse ________ - CORRECT ANSWER - 1) conduction
2) formation
Signs and symptoms experienced during tachycardia are usually primarily related to: -
CORRECT ANSWER - Decreased ventricular filling time and stroke volume
Which of the following correctly reflects examples of ectopic pacemakers? - CORRECT
ANSWER - the AV junction and ventricles
A wandering atrial pacemaker rhythm with a ventricular rate of 60-100 bpm may also be referred
to as ______ - CORRECT ANSWER - Multiformed atrial tachycardia
The most common type of ventricular tachycardia is ______ - CORRECT ANSWER -
AVNRT
What is meant by the term "uncontrolled atrial fibrillation"? - CORRECT ANSWER - The
overall ventricular rate is greater than 100 bpm
If the onset or end of paroxysmal atrial tachycardia or paroxysmal supraventricular tachycardia is
not observed on the ECG, the dysrhythmia is called: - CORRECT ANSWER -
Supraventricular tachycardia
,What is the most common sustained dysrhythmia in adults - CORRECT ANSWER - Atrial
fibrillation
What is the difference between a PAC and a PJC? - CORRECT ANSWER - a PAC will
have a P wave before the QRS complex, whereas a PJC may/may not have a P wave before.
Wolf Parkinson syndrome is associated with a short PR interval, delta wave, and wide QRS
complex. T or F? - CORRECT ANSWER - True
Which of the following ECG characteristics distinguishes atrial flutter from other atrial
dysrhythmias? - CORRECT ANSWER - The saw tooth picket fence appearance of the
wave forms
When a junctional rhythm is viewed in lead II, where is the location of the P wave on the ECG if
atrial and ventricular depolarization occur simultaneously? - CORRECT ANSWER -
Within the QRS complex
What is the usual rate of nonparoxysmal junctional tachycardia? - CORRECT ANSWER -
101-140 bpm
Depending on the severity of the patients symptoms, management of slow rhythms may require
therapeutic intervention including _________ - CORRECT ANSWER - administration of
atropine
The term for three or more PVCs that occur at a rate of 100 or more beats per minute is called
_______ - CORRECT ANSWER - A run of ventricular tachycardia
PVC's that look alike in the same lead and begin from the same anatomic site are called ______
PVC's - CORRECT ANSWER - Uniform
, What kind of dysrhythmia has QRS complexes that vary in shape and amplitude from beat to
beat and appear to twist from upright to negative and upright and back, resembling a spindle? -
CORRECT ANSWER - Polymorphic ventricular tachycardia
When a delay or interruption in impulse conduction from the atria to the ventricles occurs as a
result of a transient or permanent anatomic or functional impairment, the resulting dysrhythmia
is called _______ - CORRECT ANSWER - AV block
If you see RsR in lead V1, what kind of block is it? - CORRECT ANSWER - Right BBB
The PR interval of a first degree AV block is: - CORRECT ANSWER - Constant and more
than 0.20 sec in duration
Which of the blocks is a complete block? - CORRECT ANSWER - 3rd degree block
Which of the following is true regarding a 2:1 AV block? - CORRECT ANSWER - 1) the
atrial rhythm is irregular
2) the PR is constant****
3) the ventricular rate is 2X the atrial rate
4) the level of the block is located within the SA node
The terms advanced or high grade second degree AV block may be used to describe one or more
consecutive P waves that are not conducted. - CORRECT ANSWER - False (3+ waves are
not conducted)
Which lead is best to use to differentiate between a right and left bundle branch block? -
CORRECT ANSWER - V1
The term capture refers to: - CORRECT ANSWER - the successful conduction of an
artificial pacemakers impulse through the myocardium, resulting in depolarization
