Med Surg Cardiac ACTUAL UPDATED
Exam Questions and CORRECT Answers
what is the normal time range for a PR interval - CORRECT ANSWER - 0.12-0.2 seconds
what is the normal time range for a QRS interval - CORRECT ANSWER - 0.04-0.12
seconds
what is the normal time range for a QT interval - CORRECT ANSWER - 0.32-0.4
Describe the following characteristics for a sinus rhythm:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P waves present before every QRS
Normal PR interval length
Rate is 60-100
Rhythm is regular
Describe the following characteristics for a bradycardia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P wave is normal
PR interval is normal
Rate is less than 60
Rhythm is normal
,Which part of the hearts electrical system is responsible for pacing in a sinus rhythm -
CORRECT ANSWER - SA node
What is the definition for a dysrhythmia - CORRECT ANSWER - disorders of formation
or conduction of electrical impulses which can cause rate and/or rhythm issues
Dysrhythmias can alter ________ and cause __________ changes - CORRECT
ANSWER - blood flow; hemodynamic
what are the signs and symptoms of bradycardia - CORRECT ANSWER - cognitive
issues, palpitations, fatigue, and coldness
what are some causes of bradycardia - CORRECT ANSWER - beta blockers, calcium
channel blockers, SA node issue so AV node sets rhythm, lasting MI effects, CAD, hypoxemia,
and vagus nerve simulation
What part of the heart's electrical system is responsible for the pacing in bradycardia -
CORRECT ANSWER - AV node
How do you treat a patient with bradycardia (5 things) - CORRECT ANSWER - atropine
(0.5mg IV), transcutaneous pacing, dopamine, epinephrine, isoproterenol
Describe the following characteristics for a sinus tachycardia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - normal P wave
PR interval is normal
rate is over 100 and under 150
rhythm is normal
, What are the causes of tachycardia - CORRECT ANSWER - anxiety, stress, medications
(stimulants, catecholamines, atropine, illicit drug use), physical activity (intermittent
tachycardia)
What is the treatment for tachycardia (6 things) - CORRECT ANSWER - adenosine, vagal
maneuvers (coughing, carotid massage, gagging, bearing down, cold stimulus to face),
synchronized cardioversion, IV beta blockers and calcium channel blockers, catheter ablation if
nothing else is effective
Describe the following characteristics for a sinus arrythmia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P wave is present before every QRS
PR interval is normal
rate is 60-100
rhythm is irregular
what is the common treatment plan for sinus arrythmia - CORRECT ANSWER - no
treatment is usually needed
what are some causes of sinus arrythmia - CORRECT ANSWER - respiration, heart
disease
what most commonly causes a depressed T wave - CORRECT ANSWER - hypokalemia
what is the normal range for potassium - CORRECT ANSWER - 3.5-5.0 mEq/L
normal rate for supraventricular tachycardia - CORRECT ANSWER - 150-250
Exam Questions and CORRECT Answers
what is the normal time range for a PR interval - CORRECT ANSWER - 0.12-0.2 seconds
what is the normal time range for a QRS interval - CORRECT ANSWER - 0.04-0.12
seconds
what is the normal time range for a QT interval - CORRECT ANSWER - 0.32-0.4
Describe the following characteristics for a sinus rhythm:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P waves present before every QRS
Normal PR interval length
Rate is 60-100
Rhythm is regular
Describe the following characteristics for a bradycardia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P wave is normal
PR interval is normal
Rate is less than 60
Rhythm is normal
,Which part of the hearts electrical system is responsible for pacing in a sinus rhythm -
CORRECT ANSWER - SA node
What is the definition for a dysrhythmia - CORRECT ANSWER - disorders of formation
or conduction of electrical impulses which can cause rate and/or rhythm issues
Dysrhythmias can alter ________ and cause __________ changes - CORRECT
ANSWER - blood flow; hemodynamic
what are the signs and symptoms of bradycardia - CORRECT ANSWER - cognitive
issues, palpitations, fatigue, and coldness
what are some causes of bradycardia - CORRECT ANSWER - beta blockers, calcium
channel blockers, SA node issue so AV node sets rhythm, lasting MI effects, CAD, hypoxemia,
and vagus nerve simulation
What part of the heart's electrical system is responsible for the pacing in bradycardia -
CORRECT ANSWER - AV node
How do you treat a patient with bradycardia (5 things) - CORRECT ANSWER - atropine
(0.5mg IV), transcutaneous pacing, dopamine, epinephrine, isoproterenol
Describe the following characteristics for a sinus tachycardia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - normal P wave
PR interval is normal
rate is over 100 and under 150
rhythm is normal
, What are the causes of tachycardia - CORRECT ANSWER - anxiety, stress, medications
(stimulants, catecholamines, atropine, illicit drug use), physical activity (intermittent
tachycardia)
What is the treatment for tachycardia (6 things) - CORRECT ANSWER - adenosine, vagal
maneuvers (coughing, carotid massage, gagging, bearing down, cold stimulus to face),
synchronized cardioversion, IV beta blockers and calcium channel blockers, catheter ablation if
nothing else is effective
Describe the following characteristics for a sinus arrythmia:
P wave
PR interval
Rate
Rhythm - CORRECT ANSWER - P wave is present before every QRS
PR interval is normal
rate is 60-100
rhythm is irregular
what is the common treatment plan for sinus arrythmia - CORRECT ANSWER - no
treatment is usually needed
what are some causes of sinus arrythmia - CORRECT ANSWER - respiration, heart
disease
what most commonly causes a depressed T wave - CORRECT ANSWER - hypokalemia
what is the normal range for potassium - CORRECT ANSWER - 3.5-5.0 mEq/L
normal rate for supraventricular tachycardia - CORRECT ANSWER - 150-250
