ECG- Final Exam Questions With 100%
Correct Answers 2026-2027
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
The 12 lead provides a second view of each lead - Correct Answer-2.5 second
Although a RV infarction may occur by itself, it is more commonly associated with a
wall infarction - Correct Answer-inferior
Poor R wave progression is a phrase used to describe R waves that decrease in size
from V1-V4. This is often seen in what walls? - Correct Answer-Anteroseptal
A beat originating in the AV junction that appears later than the next expected sinus
beat is called - Correct Answer-junctional escape beat
A rapid, wide QRS rhythm associated with pulselessness, shock, or heart failure is
called: - Correct Answer-Ventricular tachycardia
Correct Answers 2026-2027
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
The 12 lead provides a second view of each lead - Correct Answer-2.5 second
Although a RV infarction may occur by itself, it is more commonly associated with a
wall infarction - Correct Answer-inferior
Poor R wave progression is a phrase used to describe R waves that decrease in size
from V1-V4. This is often seen in what walls? - Correct Answer-Anteroseptal
A beat originating in the AV junction that appears later than the next expected sinus
beat is called - Correct Answer-junctional escape beat
A rapid, wide QRS rhythm associated with pulselessness, shock, or heart failure is
called: - Correct Answer-Ventricular tachycardia
