Lead V1 location
4th ICS, RSB
Lead V2 location
4th ICS, LSB
Lead V3 location
5th ICS, between V2 and V4
Lead V4 location
5th ICS, L Midclavicular Line
Lead V5 location
5th ICS, L Anterior Axillary Line
Lead V6 location
5th ICS, L Midaxillary Line
Lead 1 +
L arm
Lead 2 +
L leg
Lead 3 +
L leg
Lead 3 -
L arm
Lead 2 -
R arm
Lead 1 -
R arm
Lead aVR +
R arm
Lead aVL +
L arm
Lead aVF +
L leg
- poles in augmented leads
central terminal
- poles in precordial leads
central terminal
+ electrode
perspective that is looked from in all leads
White lead wire
R arm/subclavicular fossa
Black lead wire
L arm/cubclavicular fossa
Red lead wire
L leg/L lower torso
Green lead wire
R leg/R lower torso
Ground wire
Green wire/R leg/R lower torso
Heart Contraction
depolarization
Heart Relaxation
repolarization
Charge of resting cell
-
Charge of depolarized cell
+
Contraction term
systole
Relaxation term
diastole
Lead for a rhythm strip
lead 2
Anterior of Heart
V1,V2,V3,V4
Lateral Wall
1,aVL,V5,V6
Inferior Wall
2,3,aVF
CA brings blood to inferior wall
R main
CA brings blood to lateral wall
circumflex
CA brings blood to anterior wall
anterior descending
Limb Leads
1,2,3,aVF,aVR,aVL
Precordial leads
V1-V6
Bipolar leads
1,2,3
Unipolar leads
aVF,aVR,aVL,V1-V6
speed of EKG printing
25mm/sec
setting of EKG spaces
50mm/sec
sensitivity of EKG
10mm/mV
Sensitivity or
Gain
standard gain
1
10 electrodes and lead wires
12 lead and stress test
5 electrodes and lead wires
holter and telemetry
at home, long time
holtor and event monitoring
heart response to tachycardia
stress test
3 electrodes and lead wires
continuous monitoring