EKG Final Exam Questions with Detailed Verified
Answers
A branch of the _______ supplies the right atrium and right ventricle with blood
Ans: right coronary artery (RCA)
Stimulation of parasympathetic nerve fibers typically results in what action? Ans:
Slowed conduction through the atrioventricular (AV) node
The contribution of blood that is added to the ventricles and results from atrial
contraction is called: Ans: atrial kick
Semilunar Valves include: Ans: pulmonary valve and aortic valve
The left main coronary artery divides into the Ans: LAD and Cx branches
_____ cells are specialized cells of the electrical conduction system responsible for the
spontaneous generation and conduction of electrical impulses. Ans: Pacemaker
The absolute refractory period beings with.... Ans: begins with the onset of the QRS
complex and terminates at approximately the apex of the T wave
T/F: The QT interval represents the time from initial depolarization of the ventricles to
the end of ventricular repolarization Ans: true
How do you determine whether the atrial rhythm on an ECG tracing is regular or
irregular? Ans: compare P-P intervals
Which ECG leads use two distinct electrodes, one of which is positive and the other
negative? Ans: leads I, II, and III
In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with?
Ans: expiration
, An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR
interval of 0.14 second, a QRS duration of 0.06 second, and one upright P wave before
each QRS. This rhythm is: Ans: sinus bradycardia
SA block is a disorder of ______, and sinus arrest is a disorder of impulse _______.
Ans: SA block is a disorder of conduction
Sinus arrest is a disorder of formation
Signs and symptoms experienced during a tachydysrhythmia are usually primarily
related to: Ans: decreased ventricular filling time and stroke volume
Example that reflects ectopic (latent) pacemaker: Ans: the AV junction and ventricles
A wandering atrial pacemaker rhythm with a ventricular rate of 60 to 100 bpm may
also be referred to as: Ans: multiform atrial rhythm
The most common type of supraventricular tachycardia (SVT) is? Ans: AVNRT-- AV
nodal reentrant tachycardia
If the onset or end of paroxysmal atrial tachycardia or paroxysmal supraventricular
tachycardia (PVST) is not observed on the ECG, the dysrhythmia is called: Ans: SVT
paroxysmal means sudden onset
Most common sustained dysrhythmia in adults? Ans: AFib
T/F: The difference between premature atrial complexes (PACs) and premature
junctional complexes (PJCs) in leads II, III and aVF is a PAC typically has a positive P
wave before the QRS complex, whereas a P wave may or may not be present in a PJC
Ans: true
A Wolff-Parkinson-White (WPW) pattern is associated with a : Ans: short PR
interval, delta wave, and wide QRS complex
© Get it right 2025 Getaway - Stuvia US All rights reserved
Answers
A branch of the _______ supplies the right atrium and right ventricle with blood
Ans: right coronary artery (RCA)
Stimulation of parasympathetic nerve fibers typically results in what action? Ans:
Slowed conduction through the atrioventricular (AV) node
The contribution of blood that is added to the ventricles and results from atrial
contraction is called: Ans: atrial kick
Semilunar Valves include: Ans: pulmonary valve and aortic valve
The left main coronary artery divides into the Ans: LAD and Cx branches
_____ cells are specialized cells of the electrical conduction system responsible for the
spontaneous generation and conduction of electrical impulses. Ans: Pacemaker
The absolute refractory period beings with.... Ans: begins with the onset of the QRS
complex and terminates at approximately the apex of the T wave
T/F: The QT interval represents the time from initial depolarization of the ventricles to
the end of ventricular repolarization Ans: true
How do you determine whether the atrial rhythm on an ECG tracing is regular or
irregular? Ans: compare P-P intervals
Which ECG leads use two distinct electrodes, one of which is positive and the other
negative? Ans: leads I, II, and III
In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with?
Ans: expiration
, An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR
interval of 0.14 second, a QRS duration of 0.06 second, and one upright P wave before
each QRS. This rhythm is: Ans: sinus bradycardia
SA block is a disorder of ______, and sinus arrest is a disorder of impulse _______.
Ans: SA block is a disorder of conduction
Sinus arrest is a disorder of formation
Signs and symptoms experienced during a tachydysrhythmia are usually primarily
related to: Ans: decreased ventricular filling time and stroke volume
Example that reflects ectopic (latent) pacemaker: Ans: the AV junction and ventricles
A wandering atrial pacemaker rhythm with a ventricular rate of 60 to 100 bpm may
also be referred to as: Ans: multiform atrial rhythm
The most common type of supraventricular tachycardia (SVT) is? Ans: AVNRT-- AV
nodal reentrant tachycardia
If the onset or end of paroxysmal atrial tachycardia or paroxysmal supraventricular
tachycardia (PVST) is not observed on the ECG, the dysrhythmia is called: Ans: SVT
paroxysmal means sudden onset
Most common sustained dysrhythmia in adults? Ans: AFib
T/F: The difference between premature atrial complexes (PACs) and premature
junctional complexes (PJCs) in leads II, III and aVF is a PAC typically has a positive P
wave before the QRS complex, whereas a P wave may or may not be present in a PJC
Ans: true
A Wolff-Parkinson-White (WPW) pattern is associated with a : Ans: short PR
interval, delta wave, and wide QRS complex
© Get it right 2025 Getaway - Stuvia US All rights reserved
