220 Exam 1

Question 1

As the nurse, you know that the following can cause rhythm disorders: (Select all that apply.)
A. Exercise
B. Electrolyte imbalances
C. Myocardial hypertrophy
D. Myocardial damage
E. Eating red meat

Answer 1

B. Electrolyte imbalances
C. Myocardial hypertrophy
D. Myocardial damage

Question 2

As the nurse caring for a patient on a cardiac monitor, you understand which of the following steps are necessary to correctly identify the rhythm? (Select all that apply.)
A. Determine the rate.
B. Determine the regularity.
C. Determine if there is a QRS for every P wave.
D. Determine if there is a P wave for every QRS.
E. Determine if there is a U wave for every QRS.

Answer 2

A. Determine the rate.
B. Determine the regularity.
C. Determine if there is a QRS for every P wave.
D. Determine if there is a P wave for every QRS.

Question 3

Key patient teaching points for AF include which of the following? (Select all that apply.)
A. Medications for HR control
B. Bleeding precautions
C. Signs and symptoms of AF with RVR
D. Cardioversion
E. Defibrillation

Answer 3

A. Medications for HR control
B. Bleeding precautions
C. Signs and symptoms of AF with RVR
D. Cardioversion

Question 4

Which of the following is not an appropriate intervention for all atrial dysrhythmias?
A. An ECG
B. A pulse check
C. Blood pressure
D. Cardioversion

Answer 4

A. An ECG
B. A pulse check
C. Blood pressure

Question 5

The nurse understands that rhythms originating in the ventricle have which of the following characteristics? (Select all that apply.)
A. Wide QRS complexes
B. Narrow QRS complexes
C. Only QRS complexes
D. Only fast rates
E. Only slow rates

Answer 5

A. Wide QRS complexes

C. Only QRS complexes

Question 6

Which of the following dysrhythmias requires defibrillation?
A. Atrial tachycardia
B. Atrial fibrillation
C. Ventricular tachycardia with a pulse
D. Ventricular fibrillation

Answer 6

D. Ventricular fibrillation

Question 7

Signs or symptoms of symptomatic ventricular dysrhythmias include which of the following? (Select all that apply.)
A. Hypotension
B. Dizziness
C. Fever
D. Shortness of breath
E. Hypertension

Answer 7

A. Hypotension
B. Dizziness
D. Shortness of breath

Question 8

The nurse understands that the normal conduction pathway for the heart is which of the following?
A. AV → SA → Ventricles → Purkinje fibers
B. Purkinje fibers → AV → Ventricles → SA
C. SA → AV → Ventricles → Purkinje fibers
D. Ventricles → Purkinje fibers → SA → AV

Answer 8

C. SA → AV → Ventricles → Purkinje fibers

Question 9

Your patient requires immediate cardioversion, which is defined as which of the following?
A. A controlled electrical shock that is triggered by and fires on the P wave
B. A controlled electrical shock that is triggered by and fires on the R wave
C. A controlled electrical shock that is triggered by and fires on the T wave
D. An electrical shock that fires randomly during the cardiac cycle

Answer 9

B. A controlled electrical shock that is triggered by and fires on the R wave

Question 10

The nurse understands transcutaneous pacing is necessary for which symptomatic patient?
A. Sinus tachycardia
B. Sinus rhythm with PACs
C. Atrial fibrillation
D. Complete heart block

Answer 10

D. Complete heart block

Question 11

A patient has VF. The nurse understands that the most effective treatment besides CPR is which of the following?
A. Antiarrhythmics
B. Defibrillation
C. Ventilation
D. Epinephrine

Answer 11

B. Defibrillation

Question 12

While educating a patient about AF, the nurse informs the patient that which of following can be symptoms of AF? (Select all that apply.)
A. Shortness of breath
B. Hypotension
C. Weight loss
D. Dizziness
E. Sweating

Answer 12

A. Shortness of breath
B. Hypotension
D. Dizziness
E. Sweating

Question 13

The nurse knows the heart's normal conduction system starts where?
A. Sinoatrial (SA) node
B. Atrioventricular (AV) node
C. Bundle of His
D. Purkinje fibers

Answer 13

A. Sinoatrial (SA) node

Question 14

The nurse recognizes the QRS complex represents what?
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization and ventricular depolarization
D. Atrial depolarization and ventricular repolarization

Answer 14

B. Ventricular depolarization

Question 15

The nurse recognizes the atrioventricular (AV) node generates electrical impulses at a rate of:
A. ≤ 20 bpm
B. ≤ 40 bpm
C. 40-60 bpm
D. 60-100 bpm

Answer 15

C. 40-60 bpm

Question 16

What is it called when the electrical conduction system is functional, but the heart muscle is not responding with a contraction?

Answer 16

Pulseless Electrical Activity (PEA)

Question 17

Treatment of PEA

Answer 17

Chest compressions, epinephrine and treating the underlying causes.

Question 18

P wave represents

Answer 18

atrial depolarization

Question 19

QRS complex represents

Answer 19

ventricular depolarization

Question 20

T wave represents

Answer 20

ventricular repolarization

Question 21

U wave represents

Answer 21

repolarization of the purkinje fibers (is rarely seen)

Question 22

PR interval

Answer 22

Is the measure of time that it takes an electrical impulse to depolarize the atria and travel to the ventricles. (0.12-0.20 secs)

Question 23

QRS interval

Answer 23

Is the measure of time to depolarize the ventricles. (0.06-0.10 secs)

Question 24

QT interval

Answer 24

Is the measure of time it takes the ventricles to depolarize and then repolarize. (Less than or equal to 0.52secs)

Question 25

Sinus Bradycardia BPM? Causes of Sinus Bradycardia? Symptomatic sinus bradycardia? Treatment for symptomatic SB?

Answer 25

HR is less than 60pm Hypoxia and hypothermia. syncope, chest pain, hypotension, SOB, diaphoresis. Atropine 0.5mg IV push

Question 26

Sinus Tachycardia bpm? Causes of sinus tachycardia? Treatment of sinus tachycardia?

Answer 26

HR is greater than 100bpm Fever, anemia, hypotension, pulmonary embolism and myocardial infarction Treat the underlying cause. Medications such as beta blockers or calcium channel blockers may be used to control or reduce the HR