Basic EKG Interpretation (Baycare)
Exam Questions & Answers8
What wave is normal for it to not be there on an EKG? - ANSWERS-Q Wave
What does the P wave represent? - ANSWERS-atrial depolarization (atrial contraction)
Where does the P wave originate? - ANSWERS-SA node
What does the QRS complex represent? - ANSWERS-ventricular depolarization (contraction)
How long is the PR interval? - ANSWERS-0.12-0.20 seconds (3-5 small boxes)
*Measure from the beginning of the P wave to beginning of the QRS
How long is the QRS complex? - ANSWERS-0.10 seconds or less
*Measure from the beginning of the QRS to end of QRS
How long is the QT interval? - ANSWERS-≤ 0.40 seconds
*Varies according to the rate. Measure from the beginning of the QRS to the end of the T
What are sinus rhythms? - ANSWERS-rhythms that originate in the SA node
, What are the characteristics of sinus bradycardia? - ANSWERS-Rate: <60
Rhythm: Regular
P waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
What are the characteristics of sinus tachycardia? - ANSWERS-Rate: >100 <180
Rhythm: Regular
P Waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
What are the characteristics of sinus block? - ANSWERS-Rate: Usually 50 - 80s
Rhythm: Irregular
- Measure R - R after the pause - does it come right back onto the R wave?
P waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: normal
What are the characteristics of sinus arrest? - ANSWERS-Rate: 40 - 70's - 80's
Rhythm: Blatantly Irregular
- Measure R-R intervals. If does NOT come back onto R wave, it is sinus arrest. When you call
MD, must know the length of the arrest
P Waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
Exam Questions & Answers8
What wave is normal for it to not be there on an EKG? - ANSWERS-Q Wave
What does the P wave represent? - ANSWERS-atrial depolarization (atrial contraction)
Where does the P wave originate? - ANSWERS-SA node
What does the QRS complex represent? - ANSWERS-ventricular depolarization (contraction)
How long is the PR interval? - ANSWERS-0.12-0.20 seconds (3-5 small boxes)
*Measure from the beginning of the P wave to beginning of the QRS
How long is the QRS complex? - ANSWERS-0.10 seconds or less
*Measure from the beginning of the QRS to end of QRS
How long is the QT interval? - ANSWERS-≤ 0.40 seconds
*Varies according to the rate. Measure from the beginning of the QRS to the end of the T
What are sinus rhythms? - ANSWERS-rhythms that originate in the SA node
, What are the characteristics of sinus bradycardia? - ANSWERS-Rate: <60
Rhythm: Regular
P waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
What are the characteristics of sinus tachycardia? - ANSWERS-Rate: >100 <180
Rhythm: Regular
P Waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
What are the characteristics of sinus block? - ANSWERS-Rate: Usually 50 - 80s
Rhythm: Irregular
- Measure R - R after the pause - does it come right back onto the R wave?
P waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: normal
What are the characteristics of sinus arrest? - ANSWERS-Rate: 40 - 70's - 80's
Rhythm: Blatantly Irregular
- Measure R-R intervals. If does NOT come back onto R wave, it is sinus arrest. When you call
MD, must know the length of the arrest
P Waves: Upright, look alike, one for every QRS
PRI: Normal
QRS: Normal
