ecg made easy_revised (1)
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ELECTROCARDIOGRAM
The electrocardiogram (ECG) i a gra!hicrecordi"g o# the electrical !ote"tial !rod$ced %&the cardiac ti$e' Electrical im!$le #ormatio" occ$r ithi" the
co"d$ctio" &tem o# the heart' Ecitatio" o# the m$cle #i%er thro$gho$t the
m&ocardi$m re$lt i" cardiac co"tractio"'
The ECG i recorded %& a!!l&i"g electrode to*ario$ locatio" o" the %od& $r#ace a"dco""ecti"g them to a recordi"g a!!arat$'
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ELECTROCARDIOGRAM
Cli"ical +al$e o# the ECG Atrial e"largeme"t a"d *e"tric$lar h&!ertro!h&
M&ocardial ichemia a"d i"#arctio" Pericarditi
S&temic dieae that a##ect the heart
Determi"atio" o# the e##ect o# cardiac dr$g
Dit$r%a"ce i" electrol&te %ala"ce E*al$atio" o# #$"ctio" o# cardiac !acema,er
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ELECTROCARDIOGRAM
Co"idera%le diag"otic *al$e Co"d$ctio" dela& o# atrial a"d *e"tric$lar
electrical im!$le Determi"atio" o# the origi" a"d %eha*ior o#
d&rh&thmia
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-. LEAD ECG
Lim% LeadRARed Right arm
LA YelloLe#t arm
LL Gree" Le#t legRLRL Blac,Blac, Right leg
Chet Lead+1 Red /thICS RPSB
+2 Yello /thICS LPSB
+3 Gree" Mida& %etee" +2a"d +4
+4 Bro" 0thICS LMCL
++55 Blac,Blac, LAAL Lateral 1 hori2o"tal to +4
+6 +iolet LMAL Lateral 1 hori2o"tal to +4
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ELECTROPHYSIOLOGY O3 THE
HEART
3o$r Electro!h&iologic E*e"t I"*ol*ed i"
the Ge"ei o# the ECG
Im!$le #ormatio" Tra"miio" o# the im!$le
De!olari2atio"
Re!olari2atio"
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CO4D5CTIO4 SYSTEM O3 THE
HEART
SA Node
Atrial Muscle
AV Node
Bundle of His
Bundle BranchesPurkinje Fibers
Ventricular Muscle
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ECG PAPER
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THE 4ORMAL
ELECTROCARDIOGRAM
P a*e Ge"erated %& acti*atio" o# the atria
PR egme"t Re!ree"t the d$ratio" o# atrio*e"tric$lar (A+)
co"d$ctio"
6RS com!le
Prod$ced %& acti*atio" o# %oth *e"tricle ST7T a*e
Re#lect *e"tric$lar reco*er&
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STA4DARD -. LEAD ECG
The P a*eAtrial acti*atio"
Height 8 9'. m+ (. mm) D$ratio" 8 9'-. ec
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STA4DARD -. LEAD ECG
P7R I"ter*al I"traatrial: i"ter"odal: Hi !$r,i";e co"d$ctio"
D$ratio" 9'-. to 9'.9 or 9'.. ec
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STA4DARD -. LEAD ECG
The 6RS Com!le +e"tric$lar acti*atio"
D$ratio" o# -99 mec
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STA4DARD -. LEAD ECG
The ST7egme"t Phae . o# tra"mem%ra"e !ote"tial
Ioelectric i" "ormal $%;ect
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STA4DARD -. LEAD ECG
The T a*e 5!right a#ter the age o# -
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