Basics of ECG

EEG
MEI
echocardiography
•
RMP -

90mV
"

SA node node de based Nat
•
e AV
polarisation are on

;n
Ea not

ft un .




Piece 7
9: ④ will be
faster
.


Deflection in
④ A
ventricles as it conducts

I
& electrical
impulse very fast .



o as it has
Purkinje fibres .




to 1-V vector )
( small

( ⑦¥¥t ) Atria
*
Deflection will be
strong ④

cardiac tissue
if piece
vector )
g p ( big
to)
'
in
bigger .




#
Ventricle
Ventricle tissue S Atrial tissue
.

o .




o :
Deflection in
t Deflection
Ventricle in Atria .




Electrical Event
-
in One
-
cardiac
Cycle : -




÷:÷÷¥÷÷÷t¥÷::÷
and
:# :



node in Slow
µ
specialised . AV is
conduction
kills the
.




impulse .
. Bundle n His e
Purkinje are


in Fast
so
tiny way forand specialisedconduction
impulse to in
by Ar node .




go grow
.

, i¥÷÷ I:÷ ÷ ÷ ÷ ÷ i÷ ÷ ÷
"




.
slow conduction
motel fast conduction




:/
•
memb
to
pass Tange & less Resistant
cells
•
Lees
gap junctions "

is:*:::: : in:i÷÷:÷÷ :c:c .
•
RMP -
60 mV a RMP -
90mV
slow Cations
• Cations move . more
fast .




*ElechicalvechorwwysmaH(in# " "

⑦ thus ECG machine does not → Heart in silent
pick the current *
.




up

② but
de
•
Ventricular septal polarisation : small
fast .




°



In
myocardium is depoian.se/9giisi. toouteY
*
¥ ¥ $0 Left ventricle
de
polarisation in
bigger
than ventricle
larger right .




( Ventricle)
④ Ventricle Base

De polarisation Hector depolarizes
Summary-
g -
at last .




mmmm 'm
Rie:::::
if
eerie * ④
from Coale H
firm ③ -




.;; ④
-




electrode at foot
inner )
myocardium .