Exam 1: Dysrhythmias
Exam 1: Dysrhythmias Study Guide
Review Questions and Answers/ A+
Score Solutions 2024-2025.
Normal Sinus Rhythm - Answer: This refers to a rhythm that starts in the SA node
at a rate of 60-100 times per minute and follows the normal conduction pathway
PR Interval - Answer: ECG
1
, Exam 1: Dysrhythmias
This is the time it takes for the impulse to spread through the atrium and just
before it continues with ventricular contraction
QRS Interval - Answer: ECG
This is measured from the beginning to the end of ventricular contraction
QT Interval - Answer: ECG
This interval measures the time of depolarization and repolarization of the
ventricles
Atrifact - Answer: ECG
This is a recording of excessive movement. It can be caused when the leads are
not secure, or the patient is moving
Patient - Answer: Assessment of Heart Rhythm
It is important to interpret the rhythm AND assess the clinical status of the
________
Femoral - Answer: Assessment of Heart Rhythm
2
, Exam 1: Dysrhythmias
To assess for hemodynamic stability, which pulse location is the best to assess?
Sinus Bradycardia - Answer: Types of Dysrhythmias
The conduction pathway is the same as sinus rhythm, but the SA node fires at a
rate less than 60 bpm.
Sinus Bradycardia - Answer: Types of Dysrhythmias
This refers to a HR that is less than 60 and is inadequate for a patients condition.
This causes symptoms such as pale, cool skin; hypotension; weakness; angina;
dizziness or syncope; confusion; and shortness of breath
Sinus Tachycardia - Answer: Types of Dysrhythmias
In this dysrhythmia, the sinus node increases because of vagal inhibition or
sympathetic stimulation. The sinus rate is 101-200 bpm.
S&S: Dizziness, dyspnea, and hypotension because of decreased CO
Paroxysmal Superventricular Tachycardia (PSVT) - Answer: Types of Dysrhythmias
This is a dysrhythmia starting in an ectopic focus anywhere above the bifurcation
of the bundle of His. The HR is 150-220 and rhythm is regular or slightly irregular.
A prolonged episode will cause decreased CO because of reduced stroke volume
3
, Exam 1: Dysrhythmias
S&S: hypotension, palpitations, dyspnea, angina
Atrial Flutter - Answer: Types of Dysrhythmias
This is an atrial tachydysrhythmia identified by recurring, regular, sawtooth-
shaped flutter waves that originate from a single ectopic focus in the right atrium.
In 2:1 conduction, the ventricular rate is typically found to be about 150 bpm
when the atrial rate is 200-350 bpm
Atrial Flutter - Answer: Types of Dysrhythmias
Which dysrhythmia can also precipitate stroke due to potential thrombus
formation?
Disorganization - Answer: Atrial Fibrillation
Atrial fibrillation is characterized by a total _______________ of electrical activity
as many sites within the atria attempt to initiate impulses at the same time
P - Answer: Atrial Fibrillation
In atrial fibrillation, there are no discernible _____ waves
1st-Degree AV Block - Answer: AV Block
4
Exam 1: Dysrhythmias Study Guide
Review Questions and Answers/ A+
Score Solutions 2024-2025.
Normal Sinus Rhythm - Answer: This refers to a rhythm that starts in the SA node
at a rate of 60-100 times per minute and follows the normal conduction pathway
PR Interval - Answer: ECG
1
, Exam 1: Dysrhythmias
This is the time it takes for the impulse to spread through the atrium and just
before it continues with ventricular contraction
QRS Interval - Answer: ECG
This is measured from the beginning to the end of ventricular contraction
QT Interval - Answer: ECG
This interval measures the time of depolarization and repolarization of the
ventricles
Atrifact - Answer: ECG
This is a recording of excessive movement. It can be caused when the leads are
not secure, or the patient is moving
Patient - Answer: Assessment of Heart Rhythm
It is important to interpret the rhythm AND assess the clinical status of the
________
Femoral - Answer: Assessment of Heart Rhythm
2
, Exam 1: Dysrhythmias
To assess for hemodynamic stability, which pulse location is the best to assess?
Sinus Bradycardia - Answer: Types of Dysrhythmias
The conduction pathway is the same as sinus rhythm, but the SA node fires at a
rate less than 60 bpm.
Sinus Bradycardia - Answer: Types of Dysrhythmias
This refers to a HR that is less than 60 and is inadequate for a patients condition.
This causes symptoms such as pale, cool skin; hypotension; weakness; angina;
dizziness or syncope; confusion; and shortness of breath
Sinus Tachycardia - Answer: Types of Dysrhythmias
In this dysrhythmia, the sinus node increases because of vagal inhibition or
sympathetic stimulation. The sinus rate is 101-200 bpm.
S&S: Dizziness, dyspnea, and hypotension because of decreased CO
Paroxysmal Superventricular Tachycardia (PSVT) - Answer: Types of Dysrhythmias
This is a dysrhythmia starting in an ectopic focus anywhere above the bifurcation
of the bundle of His. The HR is 150-220 and rhythm is regular or slightly irregular.
A prolonged episode will cause decreased CO because of reduced stroke volume
3
, Exam 1: Dysrhythmias
S&S: hypotension, palpitations, dyspnea, angina
Atrial Flutter - Answer: Types of Dysrhythmias
This is an atrial tachydysrhythmia identified by recurring, regular, sawtooth-
shaped flutter waves that originate from a single ectopic focus in the right atrium.
In 2:1 conduction, the ventricular rate is typically found to be about 150 bpm
when the atrial rate is 200-350 bpm
Atrial Flutter - Answer: Types of Dysrhythmias
Which dysrhythmia can also precipitate stroke due to potential thrombus
formation?
Disorganization - Answer: Atrial Fibrillation
Atrial fibrillation is characterized by a total _______________ of electrical activity
as many sites within the atria attempt to initiate impulses at the same time
P - Answer: Atrial Fibrillation
In atrial fibrillation, there are no discernible _____ waves
1st-Degree AV Block - Answer: AV Block
4
