NURS 468 EKG Rhythms and Treatment
NURS 468 EKG Rhythms and Treatment
Study online at https://quizlet.com/_j4ogd5
1. SA Node The normal pacemaker of the heart
The place where the electrical activity should begin
The term sinus rhythm indicates the impulse that begins in this node
The impulse traveling through the upper chambers is responsible for the
contraction of the atria
2. Conduction System After the impulse leaves the SA Node it travels to the A-V Node (atrioventricular
node). The impulse slows down a bit allowing the ventricles time to fill
Then the impulse reaches the Bundle of His and then proceeds down to the
Purkinje Fibers
The stimulus through this lower conduction system is responsible for the
ventricular contraction
3. SA Node Rate 60-100 times/min
4. AV Node Rate 40-60 times/min
5. Ventricular (Purkin- 20-40 times/min
jie) Initiation
6. P Wave First waveform represents atrial depolarization
7. Q Wave The first negative deflection before the R wave
8. R Wave First positive deflection after the P wave
9. S Wave Negative deflective after the R wave
10. QRS Complex Represents ventricular depolarization
11. T Wave Follows the QRS complex and represents ventricular repolarization
12. QT Interval Beginning of the Q wave to the end of the T wave
13. 0.04 seconds
, NURS 468 EKG Rhythms and Treatment
NURS 468 EKG Rhythms and Treatment
Study online at https://quizlet.com/_j4ogd5
How many seconds
is a small square?
14. How many seconds 0.20 seconds
is a big square?
15. Sinus Bradycardia Impulse originates in the SA node but at a rate of less than 60 times per minute
PR interval and QRS normal
16. Sinus Bradycardia May be normal, severe pain, vagal response, inferior MI, acute spinal cord
Causes injury, drugs, hypoxia
17. Sinus Bradycardia Are they symptomatic?
Treatment Atropine, dopamine infusion, epinephrine infusion, pacing
18. Sinus Bradycardia
EKG
19. Bradycardia and Hypotension?
PEA Questions Acutely altered mental status?
Signs of shock?
Ischemic chest discomfort
Acute heart failure
20. Sinus Tachycardia ST originates in the SA node
Rate is 100-150 beats per minute (occasionally increases to 180 times per
minute)
Usually due to increase in sympathetic tone
21. Sinus Tachycardia Stress
Causes Exercise
Stimulants
Fever, anemia, hyperthyroidism
Shock, hypoxemia, and heart failure
NURS 468 EKG Rhythms and Treatment
Study online at https://quizlet.com/_j4ogd5
1. SA Node The normal pacemaker of the heart
The place where the electrical activity should begin
The term sinus rhythm indicates the impulse that begins in this node
The impulse traveling through the upper chambers is responsible for the
contraction of the atria
2. Conduction System After the impulse leaves the SA Node it travels to the A-V Node (atrioventricular
node). The impulse slows down a bit allowing the ventricles time to fill
Then the impulse reaches the Bundle of His and then proceeds down to the
Purkinje Fibers
The stimulus through this lower conduction system is responsible for the
ventricular contraction
3. SA Node Rate 60-100 times/min
4. AV Node Rate 40-60 times/min
5. Ventricular (Purkin- 20-40 times/min
jie) Initiation
6. P Wave First waveform represents atrial depolarization
7. Q Wave The first negative deflection before the R wave
8. R Wave First positive deflection after the P wave
9. S Wave Negative deflective after the R wave
10. QRS Complex Represents ventricular depolarization
11. T Wave Follows the QRS complex and represents ventricular repolarization
12. QT Interval Beginning of the Q wave to the end of the T wave
13. 0.04 seconds
, NURS 468 EKG Rhythms and Treatment
NURS 468 EKG Rhythms and Treatment
Study online at https://quizlet.com/_j4ogd5
How many seconds
is a small square?
14. How many seconds 0.20 seconds
is a big square?
15. Sinus Bradycardia Impulse originates in the SA node but at a rate of less than 60 times per minute
PR interval and QRS normal
16. Sinus Bradycardia May be normal, severe pain, vagal response, inferior MI, acute spinal cord
Causes injury, drugs, hypoxia
17. Sinus Bradycardia Are they symptomatic?
Treatment Atropine, dopamine infusion, epinephrine infusion, pacing
18. Sinus Bradycardia
EKG
19. Bradycardia and Hypotension?
PEA Questions Acutely altered mental status?
Signs of shock?
Ischemic chest discomfort
Acute heart failure
20. Sinus Tachycardia ST originates in the SA node
Rate is 100-150 beats per minute (occasionally increases to 180 times per
minute)
Usually due to increase in sympathetic tone
21. Sinus Tachycardia Stress
Causes Exercise
Stimulants
Fever, anemia, hyperthyroidism
Shock, hypoxemia, and heart failure
