Question 1

Treatment of sinus dysrhythmia:

Accepted Answer

A)  includes administering atropine. 
B)  requires administering beta blockers. 
C)  is unnecessary provided the patient is asymptomatic. 
D)  includes pacing. 
A)  includes administering atropine. 
B)  requires administering beta blockers. 
C)  is unnecessary provided the patient is asymptomatic. 
D)  includes pacing.

Question 2

The characteristic that helps you differentiate sinus dysrhythmia from the other dysrhythmias that arise from the SA node is:

Accepted Answer

A)  a rate that is between 60 and 100 beats per minute. 
B)  the presence of one normal P wave preceding each QRS complex. 
C)  a patterned irregularity to the rhythm. 
D)  QRS complexes which are less than 0.12 seconds in duration 
A)  a rate that is between 60 and 100 beats per minute. 
B)  the presence of one normal P wave preceding each QRS complex. 
C)  a patterned irregularity to the rhythm. 
D)  QRS complexes which are less than 0.12 seconds in duration

Question 3

During normal heart activity, the _______ acts as the primary pacemaker.

Accepted Answer

A)  AV node 
B)  atria 
C)  Purkinje fibers 
D)  SA node 
A)  AV node 
B)  atria 
C)  Purkinje fibers 
D)  SA node

Question 4

Sinus tachycardia may be caused by:

Accepted Answer

A)  an underlying illness such as hypovolemia or respiratory distress. 
B)  excessive parasympathetic nervous system stimulation. 
C)  carotid sinus massage, vomiting or Valsalva's maneuver. 
D)  severe damage to the SA node 
A)  an underlying illness such as hypovolemia or respiratory distress. 
B)  excessive parasympathetic nervous system stimulation. 
C)  carotid sinus massage, vomiting or Valsalva's maneuver. 
D)  severe damage to the SA node

Question 5

Cardiac output is defined as ________________.

Accepted Answer

A)  blood pressure x stroke volume 
B)  peripheral resistance x heart rate 
C)  heart rate x stroke volume 
D)  blood pressure plus systole 
A)  blood pressure x stroke volume 
B)  peripheral resistance x heart rate 
C)  heart rate x stroke volume 
D)  blood pressure plus systole

Question 6

Sinus tachycardia

Accepted Answer

A)  results in decreased cardiac output. 
B)  arises from the SA node. 
C)  is caused by parasympathetic nervous system stimulation. 
D)  leads to improved myocardial oxygenation. 
A)  results in decreased cardiac output. 
B)  arises from the SA node. 
C)  is caused by parasympathetic nervous system stimulation. 
D)  leads to improved myocardial oxygenation.

Question 7

Stimulation of the vagus nerve increases the firing rate of the SA node while stimulation of the sympathetic system decreases it.

Accepted Answer

A) True 
 B)False

Question 8

Sinus dysrhythmia typically has:

Accepted Answer

A)  one P wave preceding each QRS complex. 
B)  wide and bizarre looking QRS complexes. 
C)  longer than normal QT intervals. 
D)  PR intervals of greater than 0.20 seconds in duration. 
A)  one P wave preceding each QRS complex. 
B)  wide and bizarre looking QRS complexes. 
C)  longer than normal QT intervals. 
D)  PR intervals of greater than 0.20 seconds in duration.

Question 9

Sick sinus syndrome is a group of abnormal rhythms that occur with malfunction of the SA node.

Accepted Answer

A) True 
 B)False

Question 10

Sinoatrial exit block:

Accepted Answer

A)  occurs when the SA node fires but conduction to the AV node is delayed or blocked 
B)  is caused by parasympathetic nervous system stimulation. 
C)  commonly produces hypotension. 
D)  is extremely common. 
A)  occurs when the SA node fires but conduction to the AV node is delayed or blocked 
B)  is caused by parasympathetic nervous system stimulation. 
C)  commonly produces hypotension. 
D)  is extremely common.

Treatment of sinus dysrhythmia:

The characteristic that helps you differentiate sinus dysrhythmia from the other dysrhythmias that arise from the SA node is:

During normal heart activity, the _______ acts as the primary pacemaker.

Sinus tachycardia may be caused by:

Cardiac output is defined as ________________.

Sinus tachycardia

Stimulation of the vagus nerve increases the firing rate of the SA node while stimulation of the sympathetic system decreases it.

Sinus dysrhythmia typically has:

Sick sinus syndrome is a group of abnormal rhythms that occur with malfunction of the SA node.

Sinoatrial exit block:

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 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

Putting It All Together

Filters

Exam 11: Origin and Clinical Aspects of Sinus Node Dysrhythmias

Treatment of sinus dysrhythmia:

The characteristic that helps you differentiate sinus dysrhythmia from the other dysrhythmias that arise from the SA node is:

During normal heart activity, the _______ acts as the primary pacemaker.

Sinus tachycardia may be caused by:

Cardiac output is defined as ________________.

Sinus tachycardia

Stimulation of the vagus nerve increases the firing rate of the SA node while stimulation of the sympathetic system decreases it.

Sinus dysrhythmia typically has:

Sick sinus syndrome is a group of abnormal rhythms that occur with malfunction of the SA node.

Sinoatrial exit block:

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 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

Putting It All Together

Filters