QUESTIONS WITH SOLUTIONS GRADED A+
✔✔What rhythm is initiated by the SA node and transmitted through the atria, AV
junction, bundle branches, and Purkinje fibers?
Atrial
Junctional
Sinus
Ventricular - ✔✔Sinus
✔✔All junctional rhythms originate from which pacemaker site?
AV node
AV junction
Bundle branches
SA node - ✔✔AV junction
✔✔What is the initial treatment response for a patient in either pulseless ventricular
tachycardia or ventricular fibrillation?
Provide quality CPR and defibrillate
Monitor the rhythm in another lead
Administer adenosine with rapid IV or IO
Call the physician for expert consultation - ✔✔Provide quality CPR and defibrillate
✔✔What rhythm is delayed in the AV node causing a prolonged PR interval?
2nd degree heart block type I
1st degree heart block
Junctional rhythm
Sinus arrhythmia - ✔✔1st degree heart block
✔✔Which is a key to differentiating 2nd degree block type I from type II?
PR intervals
P waves
Rate
Rhythm - ✔✔PR intervals
✔✔Which heart block is considered normal in some individuals?
Normal sinus rhythm (NSR) with bundle branch block
2nd degree block Type I
Normal sinus rhythm (NSR) with 1st degree block
2nd degree block Type II - ✔✔Normal sinus rhythm (NSR) with 1st degree block
✔✔An antiarrhythmic drug should not be administered with which of the following
rhythms? (Select all that apply)
Asystole or PEA
, Idioventricular rhythm (IVR)
Pulseless ventricular tachycardia
Ventricular fibrillation - ✔✔Asystole or PEA
Idioventricular rhythm (IVR)
✔✔An ECG strip that shows a regular atrial rhythm, an atrial rate greater than the
ventricular rate (some QRS complexes are dropped), and a constant PR interval when
the atrial and ventricular complexes appear together would most likely be identifited as
what rhythm?
2nd degree block Type II
Sinus rhythm with bundle branch block
2nd degree block Type I
Sinus rhythm with 1st degree AVB - ✔✔2nd degree block Type II
✔✔A sustained ventricular tachycardia lasts longer than 30 seconds.
True
False - ✔✔True
✔✔Which of the following statements is inaccurate about idioventricular rhythms?
Occurs when the supraventricular pacemaker fails to fire an impulse
The rate of this rhythm is not adequate to sustain life
The PR interval in this rhythm is within normal range
This rhythm generates wide, bizarre QRS complexes - ✔✔The PR interval in this
rhythm is within normal range
✔✔What does the information found in the last 0.04 seconds from the J point back into
the QRS complex differentiate?
Degree of heart block
Origin of heart block
Right bundle branch block from left bundle branch block
Root cause of bundle branch block - ✔✔Right bundle branch block from left bundle
branch block
✔✔Ventricular rhythms have a QRS of 0.10 or greater due to which of the following?
Atypical ventricular repolarization
Ventricles are stimulated asynchronously
Ventricles depolarize early
Ventricular irritability - ✔✔Ventricles are stimulated asynchronously
✔✔What are premature ventricular complexes (PVCs) that arise from several irritable
sites called?
Unifocal premature ventricular complexes
Multifocal premature ventricular complexes
Premature ventricular complex couplet