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where is lead V1 placed at?
fourth intercostol space, left to the sternum
where is lead V2 placed at?
fourth intercostol space, right of the sternum
where is lead V3 placed at?
between V2 & V4. at a angle
Where is lead V4 placed at?
fifth intercostal space left midclavicular
Where is lead V5 placed at?
Fifth intercostol space anterior- axillary
Where is lead V6 placed at?
Fifth intercostol space, midaxillary
What is the Purpose of the EKG?
-used to record the electrical impulsses that produce the cardiac cycle.
What is a electrocardiograph
the machine used to record electrical impulses on the electriocardiograms
What is Deflections/
waves on the EKG that creates peaks and valleys
How many Leads are used in the medical field?
we only use 10 but we get 12 lead readings.
Limb leads aka ...
limb lead are placed on the arms and legs
leads are placed on
deltoids and calfs
Standard leads monitor
2 limb leads
What monitors one limb lead and 1 precordial midway between the other 2 limbs
Augmented Voltage leads
AVF stands for
Augmented Voltage Foot
AVL stands for
Augmented Voltage Left
AVR stands for
Augmented Voltage Right
electrodes placed on the body
Precordial Leads aka
How many leads are placed on intercostal spaces of the chest
6 unipolar leads (numbered V1-V6)
The SA bundle Nodes conducts the
shock to make atriums contract
- first electrical impulse of depolarization in the atrium.
- small upward curve on tracing.
impulse traveling from the atrium down the septum, first downward curve on tracing
- Large upward spike representing the impulse going through the left ventricle
- -this shows how hard the ventricle has to pump to send the blood through the aorta to the body
Downward reflection and it represents impulse going through both of your ventricles
- upward curve!!
- reflecting repolarization of the ventricles
- small upward curve seen after T wave
- (not common)
- heart getting ready to get shocked
20 little boxes create big box
4 big boxes creates 1 unit
P-wave no bigger than two small boxes
Q-wave. a flat line or a downward spike no bigger than 2 small boxes
R-wave - should not be bigger than 2 big boxes (if bigger its abnormal)
S-wave-should be no bigger than 3 small boxes
Twave- no more than 2 small boxes height - and one small box wide
width shows how long it takes to recharge.
the higher the box the more intense the movement is
Most common EKG artifact is
Artifacts of EKG
- alternating current interference(electrical pull)
- Somatic interference
mounting EKGs are for
single channel EKG tracings only. Several type of mounts are slotted folders, and folders with self adhesive surfaces
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