Cardiac Dysrhythmias Advanced
Questions with Accurate Solutions|
Rationales included
What does the T wave represent?
Represents time for ventricular repolarization, should be upright.
What is the normal T wave?
0.16.
What is a possible variation cause for a T wave?
Disturbance usually caused by electrolyte disturbances; ischemia or infarction.
What does the QT interval represent?
Measured from beginning of the QRS to end of the T wave, represents time taken
for entire electrical depolarization and repolarization of the ventricles.
What is the normal QT interval?
0.34 - 0.43.
What is the possible variation cause for a QT interval?
Disturbance usually affected repolarization more than depolarization and cause
by drugs, electrolyte imbalances, and change in hr.
What is the normal firing of the SA Node?
60 - 100 times/min.
What is the normal firing of the AV Node?
40 - 60 times/min.
, What is the normal firing of the Bundle of HIS/Purkinje Fibers?
20 - 40 times/min.
What are the characteristics of Normal Sinus Rhythm?
60 - 100 bpm, regular, normal P wave/PR and QRS.
What are characteristics for Sinus Bradycardia?
< 60 bpm and regular, normal P wave/PR and QRS.
What are causes of Sinus Bradycardia?
May be normal in athletes and sleep, response to carotid artery massage,
valsalva maneuver, hypothermia, increased ICP, vagal stimulation and meds.
What disease states cause Sinus Bradycardia?
Hypothyroidism, increased ICP, hypoglycemia, and inferior wall MI.
What are the signs/symptoms of Sinus Bradycardia?
Pale, cool skin, hypotension, weakness, angina, dizziness, syncope, confusion,
disorientation SOB.
What is treatment for Sinus Bradycardia?
Atropine for the patient with symptoms. Pacemaker may be required. Drugs - hold or
d/c.
What is the characteristics of Sinus Tachycardia?
101 - 200 bpm and regular. Normal P/PR and QRS.
What are the causes of Sinus Tachycardia?
Questions with Accurate Solutions|
Rationales included
What does the T wave represent?
Represents time for ventricular repolarization, should be upright.
What is the normal T wave?
0.16.
What is a possible variation cause for a T wave?
Disturbance usually caused by electrolyte disturbances; ischemia or infarction.
What does the QT interval represent?
Measured from beginning of the QRS to end of the T wave, represents time taken
for entire electrical depolarization and repolarization of the ventricles.
What is the normal QT interval?
0.34 - 0.43.
What is the possible variation cause for a QT interval?
Disturbance usually affected repolarization more than depolarization and cause
by drugs, electrolyte imbalances, and change in hr.
What is the normal firing of the SA Node?
60 - 100 times/min.
What is the normal firing of the AV Node?
40 - 60 times/min.
, What is the normal firing of the Bundle of HIS/Purkinje Fibers?
20 - 40 times/min.
What are the characteristics of Normal Sinus Rhythm?
60 - 100 bpm, regular, normal P wave/PR and QRS.
What are characteristics for Sinus Bradycardia?
< 60 bpm and regular, normal P wave/PR and QRS.
What are causes of Sinus Bradycardia?
May be normal in athletes and sleep, response to carotid artery massage,
valsalva maneuver, hypothermia, increased ICP, vagal stimulation and meds.
What disease states cause Sinus Bradycardia?
Hypothyroidism, increased ICP, hypoglycemia, and inferior wall MI.
What are the signs/symptoms of Sinus Bradycardia?
Pale, cool skin, hypotension, weakness, angina, dizziness, syncope, confusion,
disorientation SOB.
What is treatment for Sinus Bradycardia?
Atropine for the patient with symptoms. Pacemaker may be required. Drugs - hold or
d/c.
What is the characteristics of Sinus Tachycardia?
101 - 200 bpm and regular. Normal P/PR and QRS.
What are the causes of Sinus Tachycardia?
