Question 1

When a rhythm speeds up and slows down in a rhythmic fashion it is referred to as _________ irregularity.

Accepted Answer

A)  slight 
B)  frequent 
C)  patterned 
D)  profound 
A)  slight 
B)  frequent 
C)  patterned 
D)  profound C

Question 2

When the atrial to ventricular conduction ratio changes in atrial flutter or AV heart block it:

Accepted Answer

A)  results in the rhythm being regularly irregular. 
B)  produces a regular rhythm. 
C)  is called totally irregular. 
D)  changes the distance between the R-R intervals producing an irregular rhythm. 
A)  results in the rhythm being regularly irregular. 
B)  produces a regular rhythm. 
C)  is called totally irregular. 
D)  changes the distance between the R-R intervals producing an irregular rhythm. D

Question 3

Preexcitation:

Accepted Answer

A)  leads to a delayed depolarization of the ventricles. 
B)  occurs when an impulse arises from a supraventricular site and travels through the AV node to the ventricles more quickly than normal. 
C)  leads to a longer than normal PR interval. 
D)  produces a characteristically abnormal slurring at the onset of the QRS complex and a short PR interval. 
A)  leads to a delayed depolarization of the ventricles. 
B)  occurs when an impulse arises from a supraventricular site and travels through the AV node to the ventricles more quickly than normal. 
C)  leads to a longer than normal PR interval. 
D)  produces a characteristically abnormal slurring at the onset of the QRS complex and a short PR interval. D

Question 4

When the P waves seem to "march through" the QRS complexes it indicates:

Accepted Answer

A)  a complete blockage of the AV node. 
B)  the atria are firing at a much faster rate than the ventricles. 
C)  the impulses are arising from the middle of the left atrium. 
D)  the atria are firing chaotically at a rate of greater than 350 beats per minute. 
A)  a complete blockage of the AV node. 
B)  the atria are firing at a much faster rate than the ventricles. 
C)  the impulses are arising from the middle of the left atrium. 
D)  the atria are firing chaotically at a rate of greater than 350 beats per minute.

Question 5

In atrial flutter and atrial fibrillation the ventricular rate:

Accepted Answer

A)  is the same as the atrial rate. 
B)  is between 60 and 100 beats per minute. 
C)  is most often slower than normal. 
D)  can be slower, normal or faster. 
A)  is the same as the atrial rate. 
B)  is between 60 and 100 beats per minute. 
C)  is most often slower than normal. 
D)  can be slower, normal or faster.

Question 6

Ventricular tachycardia has a rate of _____ beats per minute.

Accepted Answer

A)  100 to 180 
B)  100 to 160 
C)  100 to 250 
D)  160 to 200 
A)  100 to 180 
B)  100 to 160 
C)  100 to 250 
D)  160 to 200

Question 7

The PR intervals get progressively longer in:

Accepted Answer

A)  sinus dysrhythmia. 
B)  2nd degree AV heart block, Type I. 
C)  1st - degree AV heart block. 
D)  3rd - degree AV heart block. 
A)  sinus dysrhythmia. 
B)  2nd degree AV heart block, Type I. 
C)  1st - degree AV heart block. 
D)  3rd - degree AV heart block.

Question 8

A slow ventricular heart rate can be seen in dysrhythmias where there is a rapid atrial rate because:

Accepted Answer

A)  the AV node is blocked and not all the impulses are carried through to the ventricles. 
B)  there is excessive sympathetic nervous system stimulation of the AV node. 
C)  the atria fire and bombard the AV node so rapidly that not all the impulses are conducted through to the ventricles. 
D)  there is excessive parasympathetic nervous system stimulation of the ventricles. 
A)  the AV node is blocked and not all the impulses are carried through to the ventricles. 
B)  there is excessive sympathetic nervous system stimulation of the AV node. 
C)  the atria fire and bombard the AV node so rapidly that not all the impulses are conducted through to the ventricles. 
D)  there is excessive parasympathetic nervous system stimulation of the ventricles.

Question 9

The rhythm is called slightly irregular when:

Accepted Answer

A)  the P-P intervals and R-R vary just somewhat. 
B)  there is a cyclical pattern to the irregularity. 
C)  the rhythm seems to abruptly start and stop. 
D)  the rhythm varies from beat to beat. 
A)  the P-P intervals and R-R vary just somewhat. 
B)  there is a cyclical pattern to the irregularity. 
C)  the rhythm seems to abruptly start and stop. 
D)  the rhythm varies from beat to beat.

Question 10

When the atria fire faster than 350 beats per minute:

Accepted Answer

A)  it produces a chaotic-looking baseline with no discernible P waves. 
B)  "F" waveforms are seen. 
C)  the P' waves continuously change in appearance. 
D)  there are more upright and round P waves than there are QRS complexes. 
A)  it produces a chaotic-looking baseline with no discernible P waves. 
B)  "F" waveforms are seen. 
C)  the P' waves continuously change in appearance. 
D)  there are more upright and round P waves than there are QRS complexes.

Question 11

With 2nd-degree AV heart block, Type II, the PR intervals associated with the P waves which are followed by a QRS complex will be:

Accepted Answer

A)  shorter than normal. 
B)  constant. 
C)  variable. 
D)  constantly changing. 
A)  shorter than normal. 
B)  constant. 
C)  variable. 
D)  constantly changing.

Question 12

Sinus bradycardia:

Accepted Answer

A)  is a slow heart rate. 
B)  arises from the AV junction. 
C)  results from sympathetic nervous system stimulation. 
D)  is caused by failure of the SA node. 
A)  is a slow heart rate. 
B)  arises from the AV junction. 
C)  results from sympathetic nervous system stimulation. 
D)  is caused by failure of the SA node.

Question 13

1st-degree AV heart block can occur with any rhythm originating in the SA node, such as sinus rhythm, bradycardia, or tachycardia.

Accepted Answer

A) True 
 B)False

Question 14

An escape pacemaker that arises from the AV junction as a result of SA node arrest will have a rate of __________ beats per minute.

Accepted Answer

A)  50 to 80 
B)  20 to 40 
C)  40 to 60 
D)  10 to 50 
A)  50 to 80 
B)  20 to 40 
C)  40 to 60 
D)  10 to 50

Question 15

Sinus arrest:

Accepted Answer

A)  is seen as a regular rhythm. 
B)  occurs when the SA node initiates an early impulse. 
C)  produces a sudden absence of a P wave, QRS complex and T wave in an otherwise normal looking rhythm. 
D)  produces a shorter than normal R-R interval because of the dropped beat. 
A)  is seen as a regular rhythm. 
B)  occurs when the SA node initiates an early impulse. 
C)  produces a sudden absence of a P wave, QRS complex and T wave in an otherwise normal looking rhythm. 
D)  produces a shorter than normal R-R interval because of the dropped beat.

Question 16

The P' waves in atrial tachycardia:

Accepted Answer

A)  have a different morphology than normal P waves. 
B)  are buried in the T wave of the preceding beat. 
C)  look the same as those seen in sinus tachycardia. 
D)  are indiscernible. 
A)  have a different morphology than normal P waves. 
B)  are buried in the T wave of the preceding beat. 
C)  look the same as those seen in sinus tachycardia. 
D)  are indiscernible.

Question 17

The PR intervals are not measurable in:

Accepted Answer

A)  wandering atrial pacemaker. 
B)  atrial flutter. 
C)  2nd degree AV heart block, Type I. 
D)  premature atrial complexes. 
A)  wandering atrial pacemaker. 
B)  atrial flutter. 
C)  2nd degree AV heart block, Type I. 
D)  premature atrial complexes.

Question 18

When there are more P waves than QRS complexes it indicates that:

Accepted Answer

A)  impulses are arising from the lower-right atrium near the AV node or in the left atrium. 
B)  the atria are firing so fast that not all the impulses can pass through the AV node and some are blocked. 
C)  impulses are initiated in the SA node or other ectopic sites in the atria but are blocked and do not reach the ventricles. 
D)  impulses are arising from many different locations in the atria. 
A)  impulses are arising from the lower-right atrium near the AV node or in the left atrium. 
B)  the atria are firing so fast that not all the impulses can pass through the AV node and some are blocked. 
C)  impulses are initiated in the SA node or other ectopic sites in the atria but are blocked and do not reach the ventricles. 
D)  impulses are arising from many different locations in the atria.

Question 19

In SA node arrest a slow heart is caused by:

Accepted Answer

A)  blockage of the AV node. 
B)  failure of the heart's primary pacemaker. 
C)  increased excitability of the heart muscle. 
D)  a rapid firing of the atria. 
A)  blockage of the AV node. 
B)  failure of the heart's primary pacemaker. 
C)  increased excitability of the heart muscle. 
D)  a rapid firing of the atria.

Question 20

Premature beats:

Accepted Answer

A)  appear in middle of the R-R interval. 
B)  come early in the cardiac cycle. 
C)  produce a lengthening in the R-R interval between the normal (preceding) beat and the premature beat. 
D)  arise from only the ventricles. 
A)  appear in middle of the R-R interval. 
B)  come early in the cardiac cycle. 
C)  produce a lengthening in the R-R interval between the normal (preceding) beat and the premature beat. 
D)  arise from only the ventricles.

Exam 22: Putting It All Together

When a rhythm speeds up and slows down in a rhythmic fashion it is referred to as _________ irregularity.

When the atrial to ventricular conduction ratio changes in atrial flutter or AV heart block it:

Preexcitation:

When the P waves seem to "march through" the QRS complexes it indicates:

In atrial flutter and atrial fibrillation the ventricular rate:

Ventricular tachycardia has a rate of _____ beats per minute.

The PR intervals get progressively longer in:

A slow ventricular heart rate can be seen in dysrhythmias where there is a rapid atrial rate because:

The rhythm is called slightly irregular when:

When the atria fire faster than 350 beats per minute:

With 2nd-degree AV heart block, Type II, the PR intervals associated with the P waves which are followed by a QRS complex will be:

Sinus bradycardia:

1st-degree AV heart block can occur with any rhythm originating in the SA node, such as sinus rhythm, bradycardia, or tachycardia.

An escape pacemaker that arises from the AV junction as a result of SA node arrest will have a rate of __________ beats per minute.

Sinus arrest:

The P' waves in atrial tachycardia:

The PR intervals are not measurable in:

When there are more P waves than QRS complexes it indicates that:

In SA node arrest a slow heart is caused by:

Premature beats:

Anatomy and Electrophysiology of the Heart

The Electrocardiogram

Analyzing the Electrocardiogram

Heart Rate

Regularity

P-Waves

QRS Complexes

PR Intervals

ST Segments, T-Waves, QT Intervals, and U-Waves

Overview of Dysrhythmias

Origin and Clinical Aspects of Sinus Node Dysrhythmias

Origin and Clinical Aspects of Atrial Dysrhythmias

Origin and Clinical Aspects of Junctional Dysrhythmias

Origin and Clinical Aspects of Ventricular Dysrhythmias

Origin and Clinical Aspects of AV Heart Blocks

Pacemakers and Implanted Cardioverter-Defibrillators

12 Lead ECGS

Atrial Enlargement and Ventricular Hypertrophy

Bundle Branch Block

Myocardial Ischemia and Infarction

Other Cardiac Conditions and the ECG

Filters