RELIAS DYSRHYTHMIA BASIC TEST Questions
and ANSWERS 100% VERIFIED BY EXPERT
GRADE A+ Latest Updates 2024
dysrhythmia aka arrhythmia - Correct answer - abnormal cardiac rhythms
which can cause disturbances of:
rate, rhythm, or both rate and rhythm
how are dysrhythmias identified? - Correct answer Electrographic Waveform Analysis
(ECG)
what controls the rate and rhythm of the heartbeat? - Correct answer the heart's
electrical system
explain the heart's electrical system - Correct answer Each electrical signal (impulse)
begins in a group of cells called the sinus node or sinoatrial (SA) node. The SA node is
located in the right atrium. In a healthy adult heart at rest, the SA node sends an
electrical signal to begin a new heartbeat 60 to 100 times a minute. (This rate may be
slower in very fit athletes.)
From the SA node, the electrical signal travels through the right and left atria. It causes
the atria to contract and pump blood into the ventricles.
The electrical signal then moves down to a group of cells called the atrioventricular (AV)
node, located between the atria and the ventricles. Here, the signal slows down slightly,
allowing the ventricles time to finish filling with blood.
The electrical signal then leaves the AV node and travels to the ventricles. It causes the
ventricles to contract and pump blood to the lungs and the rest of the body. The
ventricles then relax, and the heartbeat process starts all over again in the SA node.
normal sinus rhythm (characteristics) - Correct answer 1. Rate:60-100 beats/min
Rhythm: regular
2. P wave: upright .06-.12 sec
3. PR interval: .12-.20 sec
4. QRS complex: <.03 sec
Sinus Bradycardia - Correct answer in sinus bradycardia, the conduction pathway is the
same but the impulse generates in the SA node slower than usual causing a slowed
heart rate >60
-symptomatic sinus bradycardia refers to a HR >60 and is inadequate for the patients
condition causing symptoms
sinus bradycardia (ECG characteristics) - Correct answer 1. Rate: < 60 beats/min
1
,[Date]
, Rhythm: regular
2. P wave: Normal
3. PR interval: Normal
4. QRS complex: Normal
sinus bradycardia clinical associations - Correct answer 1. may be a normal in
ATHLETES and during SLEEP
2. occurs in response to:
carotid sinus massage
Valsalva maneuver
hypothermia
increased intraocular pressure
vagal stimulation
and certain drugs ( Bblockers, Ca channel blockers)
3. disease states associated with it:
hypothyroidism
increased intracranial pressure
hypoglycemia
inferior MI
Sinus Bradycardia: Clinical Significance - Correct answer clinical significance of sinus
bradycardia depends on how the pt tolerates it.
S&S of symptomatic sinus bradycardia include:
pale, cool skin
hypotension
weakness
angina
dizziness/syncope
confusion/disorientation
shortness of breath
treatment for symptomatic sinus bradycardia - Correct answer atropine (anticholinergic)
transcutaneous pacing
dopamine/epinephrine infusion
permanent pacemaker
[Date] 2
and ANSWERS 100% VERIFIED BY EXPERT
GRADE A+ Latest Updates 2024
dysrhythmia aka arrhythmia - Correct answer - abnormal cardiac rhythms
which can cause disturbances of:
rate, rhythm, or both rate and rhythm
how are dysrhythmias identified? - Correct answer Electrographic Waveform Analysis
(ECG)
what controls the rate and rhythm of the heartbeat? - Correct answer the heart's
electrical system
explain the heart's electrical system - Correct answer Each electrical signal (impulse)
begins in a group of cells called the sinus node or sinoatrial (SA) node. The SA node is
located in the right atrium. In a healthy adult heart at rest, the SA node sends an
electrical signal to begin a new heartbeat 60 to 100 times a minute. (This rate may be
slower in very fit athletes.)
From the SA node, the electrical signal travels through the right and left atria. It causes
the atria to contract and pump blood into the ventricles.
The electrical signal then moves down to a group of cells called the atrioventricular (AV)
node, located between the atria and the ventricles. Here, the signal slows down slightly,
allowing the ventricles time to finish filling with blood.
The electrical signal then leaves the AV node and travels to the ventricles. It causes the
ventricles to contract and pump blood to the lungs and the rest of the body. The
ventricles then relax, and the heartbeat process starts all over again in the SA node.
normal sinus rhythm (characteristics) - Correct answer 1. Rate:60-100 beats/min
Rhythm: regular
2. P wave: upright .06-.12 sec
3. PR interval: .12-.20 sec
4. QRS complex: <.03 sec
Sinus Bradycardia - Correct answer in sinus bradycardia, the conduction pathway is the
same but the impulse generates in the SA node slower than usual causing a slowed
heart rate >60
-symptomatic sinus bradycardia refers to a HR >60 and is inadequate for the patients
condition causing symptoms
sinus bradycardia (ECG characteristics) - Correct answer 1. Rate: < 60 beats/min
1
,[Date]
, Rhythm: regular
2. P wave: Normal
3. PR interval: Normal
4. QRS complex: Normal
sinus bradycardia clinical associations - Correct answer 1. may be a normal in
ATHLETES and during SLEEP
2. occurs in response to:
carotid sinus massage
Valsalva maneuver
hypothermia
increased intraocular pressure
vagal stimulation
and certain drugs ( Bblockers, Ca channel blockers)
3. disease states associated with it:
hypothyroidism
increased intracranial pressure
hypoglycemia
inferior MI
Sinus Bradycardia: Clinical Significance - Correct answer clinical significance of sinus
bradycardia depends on how the pt tolerates it.
S&S of symptomatic sinus bradycardia include:
pale, cool skin
hypotension
weakness
angina
dizziness/syncope
confusion/disorientation
shortness of breath
treatment for symptomatic sinus bradycardia - Correct answer atropine (anticholinergic)
transcutaneous pacing
dopamine/epinephrine infusion
permanent pacemaker
[Date] 2
