EKG review Flashcards
Steps of EKG reading
- Rhythm
- Rate
- QRS Axis
- P waves/PR interval
- QRS complex
- ST Segment
- T waves
regular rhythm strip
R-R intervals: <0.12 secs
if regular rhythm, how to determine rate?
300
150
100
75
60
50
if irregular rhythm how to determine rate?
count # of R waves in 6 sec strip and multiply by 10
If LAD is based on I and aVF, what lead should be checked?
Lead II
QRS predominately positive in Lead II
abnml or nml axis?
normal axis (0-30)
If QRS is predominantly neg in Lead II
abnml or nml axis?
LAD < -30 degrees
What leads do you look in for P wave morphology?
II & V1
P wave morphology in normal sinus rhythm?
positive/upright in I, II, aVF
negative in aVR
each P wave must be followed by a QRS comples
How long is a normal PR interval?
between .12-.20 sec
What shows left atrial enlargement?
m-shaped P wave in Lead II >0.12secs
biphasic P wave in V1 with larger terminal component
What shows R atrial enlargement?
tall P wave in Lead II >3mm
Biphasic P in V1 with larger initial component
normal QRS complex
<0.12 sec
should you worry about blocks if the QRS is narrow?
NO
Left BBB
Wide QRS > 0.12
Broad, slurred R in V5, 6
Deep S wave in V1
Right BBB
Wide QRS > 0.12sec
RdR’ in V1,2
Wide S wave in V6
