Deck 4: Atrial Rhythms

Question 1

Multifocal atrial tachycardia is another name for atrial fibrillation.

Answer 1

False
When a wandering atrial pacemaker rhythm is associated with a ventricular rate of more than 100 beats/min,the dysrhythmia is called multifocal atrial tachycardia (MAT)or chaotic atrial tachycardia.

Question 2

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

Answer 2

C
This rhythm strip shows multifocal atrial tachycardia in which the P waves vary in size and shape.

Question 3

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

Answer 3

False
Synchronized cardioversion is the delivery of a shock to the heart by means of a defibrillator to terminate a rapid dysrhythmia.A synchronized shock means that the shock is timed to avoid the relative refractory period of the cardiac cycle.On the ECG,this period occurs during the peak of the T wave to approximately the end of the T wave.Defibrillation is the delivery of an electrical current across the heart muscle over a very brief period to terminate an abnormal heart rhythm.Defibrillation is also called unsynchronized countershock or asynchronous countershock,because the delivery of current has no relationship to the cardiac cycle.

Question 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

Most patients with type I atrial flutter develop atrial fibrillation.

Question 12

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 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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

Question 18

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

Question 19

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

Question 20

Individuals with preexcitation syndrome are predisposed to tachydysrhythmias.

Question 21

Identify the following rhythm (lead II): ____________________

Question 22

Identify the following rhythm (lead II).

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

Question 23

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

Question 24

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

Question 25

Complete the following ECG criteria for atrial tachycardia:

Question 26

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

Question 27

Identify the following rhythm (lead II): ____________________

Question 28

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 29

Identify the following rhythm (lead II): ____________________

Question 30

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

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

Question 31

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 32

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 33

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

Question 34

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 35

Complete the following ECG criteria for atrial flutter:

Question 36

Complete the following ECG criteria for atrial fibrillation:

Question 37

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

Question 38

Identify the following rhythm (lead II): ____________________

Question 39

Identify the following rhythm (lead II): ____________________

Question 40

Identify the following rhythm (lead II): ____________________

Question 41

Identify the following rhythm (lead MCL?): ____________________

Question 42

Identify the following rhythm (lead II): ____________________

Question 43

Identify the following rhythm (lead II): ____________________

Question 44

Identify the following rhythm: ____________________

Question 45

Identify the following rhythm: ____________________

Question 46

Identify the following rhythm (lead II): ____________________

Question 47

Identify the following rhythm (lead II): ____________________

Question 48

Identify the following rhythm (lead II): ____________________

Question 49

Identify the following rhythm (lead II): ____________________

Question 50

Identify the following rhythm (lead II): ____________________

Question 51

Identify the following rhythm (lead II): ____________________

Question 52

Identify the following rhythm (lead II): ____________________

Question 53

Identify the following rhythm (lead II): ____________________

Question 54

Identify the following rhythm: ____________________

Question 55

Identify the following rhythm (lead II): ____________________

Question 56

Identify the following rhythm (lead II): ____________________

Question 57

Identify the following rhythm (lead II): ____________________

Question 58

Identify the following rhythm: ____________________

Question 59

Identify the following rhythm (lead III): ____________________

Question 60

Identify the following rhythm (lead II): ____________________