Chapter 5-7 Flashcards
P Wave =’s
Depolarization of the atrium
You are only looking at the electrical impulse of the heart
Not the mechanical
QRS =’s
Depolarization of the ventricles
PR interval
Time electricity takes to travel from SA node to the AV node.
.12 to .20
Is the PR interval constant throughout
QRS interval
Less than .12
All QRS complexes look the same
Big box on EKG paper
.20
Little box on EKG paper
.04
5 step approach to read an EKG
- Heart Rate
- Heart Rhythm
- P Wave - for every QRS complex
- PR Interval - .12 to .20
- QRS Complex - less than .12
Heart rate with 300 method
0 / 300 / 150 / 100 / 75 / 60 / 50 / 42
Heart Rates
Bradycardia = 59 or less Normal = 60-100 Tachycardia = 101 or higher
Heart Rhythm
Regular - pattern of QRS
Irregular
Irregular Irregular
P Wave characteristics
Do I have a P Wave for every QRS
Is it upward or downward deflection
ST Segment characteristics
Is it at baseline
Elevated
Depressed
Depressed ST Segment indication of post MI up to 6 months
T Wave characteristics
Upward deflection (normal) Downward deflection
Sinus Rhythm classification.
Sinus Rhythm Sinus Tachycardia Sinus Bradycardia Sinus Disrhythmia Sinus Arrest
Sinus Rhythm
Regular
60-100 BPM
P Wave for every QRS
PR Interval .12 - .20
Sinus Tachycardia
Regular
Over 100 BPM
P Wave for every QRS
PR Interval .12 - .20
Sinus Disrhythmia
Irregular
60 - 100
P Wave for every QRS
PR a Interval .12 - .20