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Title: EKG
Description: this is an easy way to remember and learn how to read an EKG
Description: this is an easy way to remember and learn how to read an EKG
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EKG
steps in reading an EKG
Frequency:
we start by 300/nb of big squares
if irregular we count 30 big squares and x10 the nb of qrs complexes
if Sinus bradycardia we treat with Atropine
Rhythm:
it's sinus if we have a P for every QRS and a QRS after every P
regularly irregular if the irregularity is in a pattern (usually 2nd degree AV blocks)
irregularly irregular if the whole pattern is random (Afib)
Axis:
eza lead I and lead II are +ve then it's normal
eza lead I +ve and II and III are -ve then it's a right axis deviation upward
eza lead I -ve and lead II and III are +ve then its a left axis deviation downwards
Hypertrophy: V1 or V2 + V5 or V6 eza above u big squares then we have a
hypertrophy
Ischemia: ST depression (1mm deviation) in 2 consecutive leads
...
look at consecutive leads as they are geographically
Lateral: I, AvL, V5, V6
Anterior: V3, V4
Septal: V1, V2
Inferior: II, III, AvF
EXCEPTION 1: if we have a ST depression in V1, V2, V3 then we have to exclude
a Posterior Infarct by performing a back EKG and if we see an ST elevation there
then it's an infarct
EXCEPTION 2: if we have ST depression in the inferior leads then it could be 1
of 3 things so we have to rule out:
Right ventricle infarction by performing a Right EKG and checking for ST
elevations there
...
Inferior wall Ischemia is the diagnosis if others are ruled out
...
AV Block:
prolonged QT interval >200
if >230 we stop B blocker since it's a side effect
2
...
Mobitz type I:
increasing PR interval until 1 P will be missed
...
Mobitz type II:
constant prolonged PR interval until 1 is missed
this is not benign
we need to put a pacemaker
3
...
AV Block:
complete AV dissociation
we 1st treat with Atropine however it usually doesn't work
we then treat with either Dobutamine or Isoproterenol
seen in lyme disease
ST elevation:
2mm deviation in 2 consecutive precordial leads
1mm deviation in 2 consecutive limb leads
indicates MI
bundle branch block:
complete if QRS above 120
incomplete if QRS below 120
Title: EKG
Description: this is an easy way to remember and learn how to read an EKG
Description: this is an easy way to remember and learn how to read an EKG