# EKG interp.

```lOMoARcPSD|13016834
5 Step
EKG INTERPRETATION
Heart rate
Rhythm
P wave
PR interval
(in seconds)
QRS
(in seconds)
60 -100/min
Regular
Present before
0.10 - 0.20
(&lt;5 small squares)
Normal shape
&lt; 0.12
8 x 10 = 80
Heart Rate
1. Normal Sinus Rhythm
Rate - 60 -100
count the peaks - we have 8 here
multiply by 10 = 80 beats!
1
2
3
4
5
6
7
8
Rhythm
2. Rhythm - R peaks are evenly spaced apart.
To quickly measure this simply grab a paper
&amp; mark 2 R peaks then just march it out.
The R peaks should be even every time.
R
R
R-R int.
R
R
R
R
P Wave
R
3. P wave - which is our atria contracting
is it present? &amp; does it have its buddy QRS?
we need a P with QRS every time
R
P
T
Q
PR interval (in seconds)
Q
S
R
5 mm
0.2 sec
0.5 mV
4. PR interval - basically measures the
time it takes between atrial contractions
&amp; ventricular contraction should be 5 mini
boxes or less - or .10 - 2.0 seconds here.
P
PR int.
QRS (in seconds)
R-R int.
PR
5 mm
0.2 sec
ST
seg.
seg.
P
PR int.
T
Q
ST int.
S
QRS
int.
QT int.
0.5 mV
5. QRS - Ventricles contracting
Is it present, upright &amp; TIGHT!
Should NOT be wide should only be
3 boxes - .12 seconds here.
T
P
S
R
```