Deck 4: Atrial Rhythms

Question 1

An accessory pathway that has one end attached to normal conductive tissue is called a(n) __________.

Answer 1

bypass tract

Question 2

Identify the following rhythm (lead II).

A) Sinus arrhythmia
B) Atrial tachycardia
C) Multifocal atrial tachycardia with a PAC
D) Sinus rhythm with a PAC, a run of PSVT, back to a sinus rhythm

Answer 2

D
The rhythm strip shows a sinus rhythm with a PAC, a run of PSVT, and then a change in the rhythm back to a sinus rhythm.

Question 3

Atrial fibrillation is characterized by _____.

A) one P wave before each QRS and a regular ventricular rate of 60 to 100 beats/min
B) an erratic, wavy baseline and irregular ventricular rhythm
C) "saw-tooth"- or "picket-fence"-shaped waveforms preceding each QRS
D) P waves occurring before, during, or after the QRS complex; when seen, they are inverted

Answer 3

B
Characteristics of atrial fibrillation:
Rhythm-Ventricular rhythm usually irregularly irregular.
Rate-Atrial rate usually 400 to 600 beats/min; ventricular rate variable.
P waves-No identifiable P waves, fibrillatory waves present; erratic, wavy baseline.
PR interval-Not measurable.
QRS duration-0.11 second or less unless abnormally conducted.

Question 4

Which of the following correctly describes multifocal atrial tachycardia?

A) Atrial rhythm is regular.
B) Ventricular rhythm is irregular.
C) Atrial and ventricular rhythms are regular.
D) Atrial and ventricular rhythms are irregular.

Question 5

P waves in this rhythm strip _____.

A) are upright before every QRS complex
B) are inverted before every QRS complex
C) vary in size and shape
D) are not identifiable

Question 6

Identify the following rhythm (lead II).

A) Atrial flutter
B) Atrial fibrillation
C) Wolff-Parkinson-White syndrome
D) AV nodal reentrant tachycardia (AVNRT)

Question 7

P waves in this rhythm strip _____.

A) are upright before every QRS complex
B) are inverted before every QRS complex
C) vary in size and shape
D) are not identifiable

Question 8

P waves in this rhythm strip _____.

A) occur regularly
B) are not identifiable; fibrillatory waves are present
C) are upright before every QRS complex
D) are not identifiable; flutter waves are present

Question 9

Complete the following ECG criteria for atrial tachycardia:

Question 10

To determine whether the ventricular rhythm on an ECG tracing is regular or irregular, compare _____ intervals.

A) PR
B) R-R
C) TP
D) P to P

Question 11

Identify the following rhythm (lead II).

A) Atrial fibrillation
B) Sinus arrhythmia
C) Multifocal atrial tachycardia
D) Sinus tachycardia with premature atrial complexes (PACs)

Question 12

A wandering atrial pacemaker rhythm with a ventricular rate of 60 to 100/min may also be referred to as _____.

A) atrial flutter
B) atrial fibrillation
C) multifocal atrial tachycardia
D) multiformed atrial rhythm

Question 13

PACs associated with a wide QRS complex are called __________ PACs, indicating that conduction through the ventricles is abnormal.

Question 14

Sometimes, when a premature atrial complex (PAC) occurs very prematurely and close to the T wave of the preceding beat, only a P wave may be seen with no QRS after it (appearing as a pause). This type of PAC is termed a _____ PAC.

Question 15

Identify the following rhythm (lead II).

A) Sinus arrhythmia
B) Sinus tachycardia
C) Sinus rhythm with a PAC
D) Sinus tachycardia with a PAC

Question 16

Delivery of an electrical current timed for delivery during the QRS complex is called _____.

Question 17

A 77-year-old woman is complaining of a sudden onset of palpitations. The cardiac monitor reveals atrial fibrillation with a ventricular response of 144 to 210 beats/min while the patient is at rest. In this situation, the ventricular rate associated with this rhythm is considered to be _____.

A) controlled
B) uncontrolled

Question 18

What is meant by the term controlled atrial fibrillation?

A) The overall ventricular rate is less than 100 beats/min.
B) The atrial rate is less than 100 beats/min.
C) The overall ventricular rate is greater than 100 beats/min.
D) The atrial rate is greater than 100 beats/min.

Question 19

The most common type of supraventricular tachycardia (SVT) is _____.

A) atrial tachycardia
B) atrial flutter
C) AV reentrant tachycardia (AVRT)
D) AV nodal reentrant tachycardia (AVNRT)

Question 20

How are frequent PACs usually managed?

A) Defibrillation
B) Synchronized cardioversion
C) Correcting the underlying cause
D) Administration of medications such as atropine or epinephrine

Question 21

Identify the following rhythm (lead II): ____________________

Question 22

Identify the following rhythm (lead II): ____________________

Question 23

Identify the following rhythm (lead II): ____________________

Question 24

Identify the following rhythm (lead II): ____________________

Question 25

Identify the following rhythm (lead II): ____________________

Question 26

Identify the following rhythm (lead II): ____________________

Question 27

Identify the following rhythm (lead II): ____________________

Question 28

Identify the following rhythm (lead II): ____________________

Question 29

Complete the following ECG criteria for atrial fibrillation:

Question 30

Identify the following rhythm (lead II): ____________________

Question 31

Identify the following rhythm (lead II): ____________________

Question 32

Identify the following rhythm (lead II): ____________________

Question 33

Identify the following rhythm (lead II): ____________________

Question 34

Complete the following ECG criteria for AV nodal reentrant tachycardia (AVNRT):

Question 35

Identify the following rhythm (lead II): ____________________

Question 36

Complete the following ECG criteria for Wolff-Parkinson-White (WPW) syndrome:

Question 37

Identify the following rhythm (lead III): ____________________

Question 38

Identify the following rhythm (lead II): ____________________

Question 39

Complete the following ECG criteria for atrial flutter:

Question 40

Identify the following rhythm (lead MCL?): ____________________

Question 41

Individuals with preexcitation syndrome are predisposed to tachydysrhythmias.

Question 42

Multifocal atrial tachycardia is another name for atrial fibrillation.

Question 43

In atrial fibrillation, fibrillatory waves are referred to as f waves.

Question 44

A macroreentrant circuit is one that involves a small area of heart tissue, usually a few centimeters or less.

Question 45

Identify the following rhythm: ____________________

Question 46

In atrial fibrillation, the AV node attempts to protect the ventricles from the hundreds of impulses bombarding it per minute by blocking many of the impulses generated by the irritable sites in the atria.

Question 47

The ventricular rhythm in atrial fibrillation is usually "irregularly irregular."

Question 48

Most patients with type I atrial flutter develop atrial fibrillation.

Question 49

Identify the following rhythm: ____________________

Question 50

Identify the following rhythm (lead II): ____________________

Question 51

Identify the following rhythm: ____________________

Question 52

Upon conversion of atrial fibrillation to sinus rhythm, the patient should be observed for signs of a possible stroke.

Question 53

Identify the following rhythm (lead II): ____________________

Question 54

The presence of an accessory pathway should be considered in atrial fibrillation with a ventricular rate faster than 180 beats/min.

Question 55

Identify the following rhythm (lead II): ____________________

Question 56

Delivery of an electrical current timed for delivery during the QRS complex is called defibrillation.

Question 57

Identify the following rhythm: ____________________

Question 58

Identify the following rhythm (lead II): ____________________

Question 59

Identify the following rhythm (lead II): ____________________

Question 60

Identify the following rhythm (lead II): ____________________