EKG Final Exam Questions With
Correct Answers
A branch of the _______ supplies the right atrium and right ventricle with blood -
answerright coronary artery (RCA)
Stimulation of parasympathetic nerve fibers typically results in what action? - answerSlowed
conduction through the atrioventricula...
A branch of the _______ supplies the right atrium and right ventricle with blood -
answer✔✔right coronary artery (RCA)
Stimulation of parasympathetic nerve fibers typically results in what action? - answer✔✔Slowed
conduction through the atrioventricular (AV) node
The contribution of blood that is added to the ventricles and results from atrial contraction is
called: - answer✔✔atrial kick
Semilunar Valves include: - answer✔✔pulmonary valve and aortic valve
The left main coronary artery divides into the - answer✔✔LAD and Cx branches
_____ cells are specialized cells of the electrical conduction system responsible for the
spontaneous generation and conduction of electrical impulses. - answer✔✔Pacemaker
The absolute refractory period beings with.... - answer✔✔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 - answer✔✔true
How do you determine whether the atrial rhythm on an ECG tracing is regular or irregular? -
answer✔✔compare P-P intervals
Which ECG leads use two distinct electrodes, one of which is positive and the other negative? -
answer✔✔leads I, II, and III
In sinus arrhythmia, a gradual decreasing of the heart rate is usually associated with? -
answer✔✔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: - answer✔✔sinus bradycardia
, THEBRIGHT EXAM SOLUTIONS 8/20/2024 8:37 PM
SA block is a disorder of ______, and sinus arrest is a disorder of impulse _______. -
answer✔✔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: -
answer✔✔decreased ventricular filling time and stroke volume
Example that reflects ectopic (latent) pacemaker: - answer✔✔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: - answer✔✔multiform atrial rhythm
The most common type of supraventricular tachycardia (SVT) is? - answer✔✔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: - answer✔✔SVT
paroxysmal means sudden onset
Most common sustained dysrhythmia in adults? - answer✔✔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 - answer✔✔true
A Wolff-Parkinson-White (WPW) pattern is associated with a : - answer✔✔short PR interval,
delta wave, and wide QRS complex
What is the main difference between atrial flutter and other atrial dysrhythmias? -
answer✔✔Atrial flutter has the saw-tooth or picket-fence appearance of waveforms before the
QRS
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? - answer✔✔during (within) the QRS
complex
The usual rate of nonparoxysmal junctional tachycardia is: - answer✔✔101-140 bpm
Junctional (or ventricular) complexes may come early (before the next expected sinus beat) or
late (after the next expected sinus beat).
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